9.53   Supplemental Standards for Zoning Districts
   A.   Requirements Applicable to All Zoning Districts
      1.   Environmental Requirements
      No land or building in any district shall be used or occupied in any manner creating dangerous, injurious, noxious, or otherwise objectionable conditions which could adversely affect the surrounding areas or adjoining premises, except that any use permitted by this ordinance may be undertaken and maintained if acceptable measures and safeguards are taken to reduce dangerous and objectionable conditions to acceptable limits as established by the following requirements:
         a.   Air Pollution
            Air pollution shall be subject to the requirements and regulations established by the Ohio Environmental Protection Agency and the Regional Air Pollution Control Agency of the Montgomery County, Ohio Combined General Health District.
         b.   Electrical Disturbance
            No activities shall be permitted which emit electrical disturbance affecting the operation of any equipment other than that of the creator of such disturbances. Any generated electrical disturbance shall comply with all applicable regulations of the Federal Communications Commission.
         c.   Erosion
            No erosion, by either wind or water, shall be permitted which will carry objectionable substances onto neighboring properties.
         d.   Fire and Explosion Hazards
            Adequate safety devices shall be provided where there are activities involving burning or storage of flammable or explosive materials, adequate safety devices shall be provided at any point. Adequate safety devices against the hazards of fire and explosion and adequate fire fighting and fire suppression equipment and devices, standard in the industry shall be provided. Burning of waste materials in open fire is prohibited.
         e.   Glare and Heat
            i.   Any operation producing intense light or heat, such as high temperature processes like combustion or welding, shall be performed within an enclosed building and shall not be visible beyond any lot line bounding the premises.
            ii.   Welding that is required for exterior construction of a structure shall be exempt from these regulations.
         f.   Liquid or Solid Wastes
            i.   No discharge at any point into any public sewer, private sewerage disposal system, stream, or into the ground, of any materials of such nature or tempera-ture as can contaminate any water supply, interfere with bacterial processes in sewage treatment, or otherwise cause the emission of dangerous or offensive elements, shall be permitted, except in accordance with minimum standards approved by the Montgomery County Health Department, the Ohio Department of Health, the Ohio Environmental Protection Agency, or such other governmental agency as shall have jurisdiction over such activities.
            ii.   The use of dumpsters or other types of reasonably accessible waste containers for the disposal of potentially dangerous liquid or solid waste materials shall not be permitted.
            iii.   The storage of large quantities of toxic material shall be prohibited.
         g.   Odors (Ord. 7-18)
         No objectionable odor shall be emitted by any use permitted in any district in such quantities as to be readily detectable on a persistent basis by a person not located on the premises. Temporary or intermittent odors shall be exempt.
         h.   Radioactive Materials
         No activities shall be permitted which utilize fissionable or radioactive materials if their use results at any time in the release or emission of any fissionable or radioactive material into the atmosphere, the ground, or sewerage systems.
         i.   Sound
            i.   No premises shall emit, beyond any lot line bounding the premises, sound in excess of the maximum sound levels permitted by this ordinance, except that when the existing ambient sound level is at or above the maximum permitted sound level. A premises may not add more than 3 dBA to the existing ambient sound level.
            ii.   Sound level (dBA) shall mean the "A" weighted measurement of a sound pressure level in decibels (referenced to 0.0002 dynes per square centimeter) in accordance with the American National Standard Specification for Sound Level Meters, ANSI S1.4 1971.
            iii.   Construction Noise. Temporary construction noise during the daytime shall be exempt from these sound level requirements.
Maximum Permitted Sound Levels (dBA)
Premises Receiving Sound
Source of Sound and Time
Residential
Commercial
Industrial
Maximum Permitted Sound Levels (dBA)
Premises Receiving Sound
Source of Sound and Time
Residential
Commercial
Industrial
Residential
   Daytime
55
60
60
   Night time
50
50
50
Commercial
   Daytime
55
60
65
   Night time
50
50
55
Industrial
   Daytime
55
60
70
   Night time
50
50
60
Night time shall mean the hours between 10:00 P.M. and 7:00 A.M.
 
         j.   Standards and Measurement Procedures
         Standards and measurement methods and procedures for the determination of the existence of any dangerous and objectionable elements shall conform to applicable standards and measurement procedures published by the American Standards Association, Inc., New York, the Manufacturing Chemists' Association, Inc., Washington, D.C., the United States Bureau of Mines, the Ohio Environmental Protection Agency, Montgomery County Environmental Health District, and other similarly recognized organizations.
         k.   Trash Collection Facility
            i.   A trash collection facility shall include a large container such as a dumpster or a small container such as a garbage can, bag or other similar container. No trash collection facility shall be located or stored in the front yard of a premises.
            ii.   A small trash container(s) may be placed at the public right of way during the normal trash collection day.
            iii.   A large trash collection facility shall be situated in a permanent location and placed on a concrete pad (3000 psi minimum). A dumpster pad shall be of a dimension that will allow a dumpster to sit entirely on the pad and to permit the front wheels of a trash disposal truck to rest on the pad while emptying said dumpster. A large trash collection facility shall also be screened so as to not be visible from a public right-of-way or an adjacent property by using an opaque fence or wall composed of wood, brick, or stone not to exceed seven (7) feet in height. (Ord. 17-14)
         l.   Vibration
         Every use shall be so operated that ground vibration inherently and recurrently generated is not perceptible, without instruments, beyond any lot line bounding the premises. No vibration at any time shall produce an acceleration of more than 0.1G or shall result in any combination of amplitudes and frequencies beyond the "safe" range of the most recent edition of Table 7, U.S. Bureau of Mines Bulletin No. 442. The equation of said bulletin shall be used to determine the values for enforcement.
   B.   Standards for Residential Land Uses
      1.   Average Depth of Front Yard
      In the Agricultural or Residential Zoning Districts, where the average depth of at least 2 existing front yards on lots within 100 feet of a lot in question and within the same block front is less or greater than the least front yard depth prescribed elsewhere in this Ordinance, the required depth of the front yard on such lot shall be modified. In such a case, the depth of the front yard shall not be less than the average depth of existing front yards, or the average depth of existing front yards of the 2 lots immediately adjoining, or, in the case of a corner lot, the depth of the front yard immediately adjoining. The depth of a front yard on any lot shall be at least 10 feet but not required to be more than 60 feet.
      2.   Erection of 1 Principal Building on a lot
      In no case shall more than 1 principal building, and its accessory buildings, be located on 1 lot unless granted by approval, Section 5.09.
      3.   Yard Projections in Residential Districts. Certain architectural features may project into required yards as follows:
         a.   A cornice, canopy, eaves, or other architectural feature of a principal building may project into a required yard a distance not exceeding 4 feet.
         b.   A bay window, balcony, or chimney may project into a required yard a maximum distance of 4 feet, provided such features do not occupy, in the aggregate, more than 1/3 of the length of the building wall on which they are located. (Ord. 17-13)
         c.   Architectural features shall not project into the public right-of-way.
   C.   Architectural Standards for Non-Residential Land Uses
      1.   Purpose
      The goal of these regulations is to encourage development that contributes to the City of Centerville as a unique place, reflecting the community's physical character and adding to it in appropriate ways. The architectural design of non-residential developments, particularly large-scale developments, determines much of the character and attractiveness along the thoroughfares of the City, the windows to our Community. These standards require a basic level of architectural variety, detail siding and roof materials that are considered traditional in Centerville, provide compatible scale and mass to surrounding development, and to mitigate negative impacts. These regulations serve as a basis to promote creative architectural design that is in context with its surroundings.
      2.   General Architectural Design Requirements
         a.   These general architectural design requirements of exterior building elevations shall apply to all non-residential uses within any base zoning district:
            i.   Architectural elevations for all buildings shall be that the design, massing, materials, shape, and scale, of all new or modified principal buildings, and accessory buildings shall create a unified design on the premises and shall be visually compatible with the surrounding buildings.
            ii.   The Planning Commission must review and approve the architectural design of all new non-residential buildings and additions to existing buildings in accordance to the requirements of this ordinance.
            iii.   The Planning Commission shall adopt and maintain a Design Guideline to provide additional information and clarification of the standards contained in this Ordinance.
         b.   Building Design and Mass
            i.   All architectural elevations of principal buildings shall consist of a base, a body, and a cap.
               1)   The base shall occupy the lowest portion of the elevation, and shall have a height no less than 8% of the average wall height.
               2)   The body shall occupy the middle portion of the elevation, and shall have a height no less than 60% of the average wall height.
               3)   The cap shall occupy the highest portion of the elevation, excluding the roof, and shall have a height no less than 8% of the average wall height, not to exceed the height of the base.
               4)   The cap shall consist of at least one of the following architectural features: a cornice, parapet, awning, canopy, or eaves.
               5)   The base and cap shall be clearly distinguishable from the body through changes in color, material, pattern, profile, or texture. A cap and base shall incorporate at least three of these design elements.
            ii.   Buildings that are characterized by a flat roof and a continuous wall elevation of uniform height shall contain three-dimensional architectural elements which serve to break up the horizontal emphasis of the elevation. Building entrances, corners and other similar features are examples that may be characterized by a separate mass.
               1)   These architectural elements shall present a balanced design for the entire building.
               2)   For a single story building, required architectural elements shall have a height that exceeds the wall height of the dominant portion of the building by at least 10% but no greater than the maximum building height required by the zoning district.
               3)   Architectural elements shall be distributed in a manner that limits the length of a continuous wall section of uniform height to 100 feet.
         c.   Building Wall Materials
            i.   Building Base: Brick, stone, or textured concrete block shall be permitted as base siding materials.
            ii.   Building Cap: Brick, stone, textured concrete block, wood, or applied materials such as exterior insulation finish system (E.I.F.S.), or other synthetic materials are examples of materials permitted for the building cap. Materials not specifically mentioned may also be permitted with the specific approval of the Planning Commission.
            iii.   Building Body: Wood, brick, and stone shall be permitted as siding materials for the body of the building. The following body materials are considered inappropriate, however, may be permitted with the specific approval by the Planning Commission on a case-by-case basis:
               1)   Siding that imitates wood lap siding such as aluminum or vinyl siding or siding that imitates brick or stone,
               2)   Ceramic tile or ceramic block,
               3)   Sheet metal, corrugated metal, or other similar metal panels,
               4)   Poured concrete, concrete block, textured concrete block, concrete panels, panels with an aggregate surface, or other similar concrete siding, or
               5)   Applied materials such as stucco or E.I.F.S.
         d.   Roof Styles and Materials
            i.   Permitted roof styles shall include gable and hip roofs. Other roof styles shall require specific approval by the Planning Commission on a case-by-case basis.
            ii.   The height of any pitched roof shall not exceed 1/2 of the overall building height.
            iii.   Permitted materials for pitched roofs include wood, slate, fiberglass reinforced asphalt roof shingles and standing seam or terned metal. Except when used on flat roofs that are not generally visible, roll roofing, built-up tar and gravel, metal panel or corrugated metal, plastic, or fiberglass roofing materials, other than fiberglass reinforced asphalt roof shingles shall be prohibited. Other roof materials shall require specific approval by the Planning Commission on a case-by-case basis.
         e.   Roof Mounted Mechanical Equipment
            Building walls, parapets, and/or roof systems shall be designed to conceal all roof-mounted mechanical equipment from view to adjacent properties and public rights-of-way.
         f.   Building Colors
            i.   Building Body: The body shall read as a single, subdued, earth-tone color. A maximum of three accent colors are also permitted that are compatible with the body color.
            ii.   Building Base: The base shall read as a single, subdued, earth-tone color.
            iii.   Building Cap: The cap shall consist of colors that are compatible with the building body color, any accent color and to each other.
            iv.   Roof: The roof color shall read as a single color that is compatible with all building wall colors.
            v.   Any building color or color combinations whose major function is to convey visual information or to attract visual attention is considered a sign and subject to the requirements of the sign section of this ordinance.
         g.   Additional Design Requirements
            i.   These requirements apply to all non-residential uses EXCEPT those industrial uses that are EXCLUSIVELY and SOLELY stated as permitted or conditional use within Table 9.1, Permitted Land Uses in Base Zoning Districts for I-1, Light Industrial District and, I-PD, Industrial Planned Development in the UDO. Permitted or conditional uses in these zoning districts that are either permitted or conditional uses in other zoning districts shall be subject to these regulations.
            ii.   These requirements are in addition to the General Architectural Design Requirements contained in this ordinance.
            iii.   Massing of Buildings
               1)   Buildings shall be designed in a manner which disrupts and/or disperses the massing of the building through the use of projections and recesses. Building elevations shall reflect spaces that are either carved out of a mass or multiple masses of varying sizes grouped together. Examples include recesses, arcades, courtyards, vertical offsets, and horizontal offsets. See Figure 9.12.
Figure 9.12: Articulation of Building Mass and Bulk by the Use of Offsets and Recesses
 
               2)   Spaces that are carved out of a mass, and/or multiple masses grouped together, shall appear as proportional to one another and shall establish a pattern or rhythm to the building facade.
               3)   Building elevations greater than 100 feet in length, measured horizontally, shall incorporate projections or recesses in the wall plane. A projected or recessed area should comprise at least 20% of the overall length of the elevations and have a minimum depth or projection equal to 3% of the total elevation length. The length and depth of any projection or recess that is less than this minimum requirement may be approved by the Planning Commission on a case-by-case basis.
               4)   The maximum length of an uninterrupted wall plane shall be 100 feet.
               5)   Walls greater than 50 feet in length shall be uniformly divided into bays through the use of columns, projecting ribs, offsets or reveals. See Figure 9.13.
Figure 9.13: Treatment of Wall Greater than 50 Feet in Length
 
            iv .    Wall Openings (Doors and Windows)
               1)   Building elevations that directly front a public street should contain windows which occupy at least 25% of the total wall surface area. The percent of the wall surface area used for windows that is less than this minimum requirement may be approved by the Planning Commission on a case-by-case basis.
               2)   Doors and windows shall be positioned in an orderly manner. Where appropriate, these elements shall form a pattern or visual rhythm along the building elevation.
               3)   All doors and windows shall be articulated through the use of lintels, sills, and thresholds. Windows larger than 20 square feet that are not used for display purposes shall be divided into panes through the use of mullions and/or sashes. Doors and windows shall be rectangular in shape. Other types may be permitted with the specific approval of the Planning Commission on a case-by-case basis.
               4)   All buildings with frontage to a public street shall contain at least one entrance on any facade fronting on a public street. All entrances designated for public or employee use shall be characterized by a separate mass and providing at least one of the following features: an overhang, awning, canopy, portico, or projection.
               5)   Emergency exits, when located on the side or rear building elevation shall be exempt from this provision.
   D.   Supplemental Standards for the Architectural Preservation District, APD
      1.   Purpose
      The City of Centerville, recognizing the unique panorama of architectural history that has developed along the major cross-roads of our community, hereby declares as a matter of public policy that the preservation, protection, perpetuation, and use of areas, places, structures, works of art or similar objects having a special historical, cultural, or aesthetic interest or value is a public necessity, and is required in the interest of the health, safety, convenience, comfort, prosperity, or general welfare of the citizens of Centerville. The purpose of this section of the UDO is to: (Ord. 20-22)
         a.   Protect the historic and architecturally significant buildings within the APD.
         b.   Ensure architectural harmony between buildings of widely varying architectural periods and styles with modern development that compliments the architecturally significant buildings.
         c.   Protect and expand the existing residential uses within the APD.
         d.   Stabilize, improve, and protect the property values of businesses within the APD.
         e.   Strengthen the economy of the City of Centerville.
         f.   Protect and enhance the visual and aesthetic character, diversity, and interest in the City of Centerville.
         g.   Promote the use and preservation of historic sites and structures for the education and general welfare of the citizens of the City of Centerville.
         h.   Establish standards and criteria for the APD.
         i.   Promote development that encourages architectural features on front and back of the building adjacent to public streets, public parking lots and public spaces in the APD.
         j.   Create a pedestrian friendly environment for easy access between businesses, public spaces, points of interest, and public parking lots in the APD.
      2.   Development Standards
         a.   Demolition or Moving of Buildings
            i.   The demolition or moving of buildings within the APD shall require the approval of the Board of Architectural Review (BAR); however, staff may approve a demolition application where an extreme safety hazard exists. In order to grant such approval, the BAR must be satisfied that the building meets at least 1 of the following criteria.
               1)   Health and Safety Hazard. The building has been deemed to be a hazard to public health or safety and repairs are deemed to be unfeasible as determined by the Building Inspector or his designee.
               2)   Deterrent to Major Community Improvement. The building is a deterrent to a major community improvement which the applicant must demonstrate will be of substantial benefit to the community. This improvement must be shown to have great potential for increasing surrounding property values.
               3)   Rehabilitation Not Economically Feasible. Rehabilitation of the building is not economically feasible. It shall be the responsibility of the applicant to prove that rehabilitation of the building would not allow a reasonable economic return on the owner's investment.
               4)   Detriment to Community. The retention of the building would not be in the interest of the community as a whole as is determined by the BAR.
            ii.   Demolition Delay Period. In cases where approval for demolition is granted, for reasons other than public health or safety, such approval shall not become effective until 3 months after the date of the approval decision by the BAR in order to provide a period of time within which it may be possible to relieve a hardship or to cause the property to be transferred to another owner who will retain the building. This in no way implies approval by the Building Department whose approval must also be secured in addition to the approval of the BAR. The BAR may waive any portion of the 3 month demolition delay period.
         b.   Off-Street Parking and Loading
            i.   All parking and loading areas shall be located in the rear yard of all non-residential, multi-family, or mixed residential and non-residential uses. Front yard or side yard parking for these uses shall be prohibited; however, side yard parking for a corner lot shall be permitted.
            ii.   Side or front yard parking shall be permitted for single-family and two-family residential uses.
            iii.   Refer to the Off-Street Parking and Loading, Section 9.29 of this Ordinance for additional requirements.
         c.   Sidewalks
            i.   All sidewalks located within dedicated public right-of-way or public roadway easements in the APD shall be of red brick type surface. This requirement shall be achieved in time through the installation of new brick sidewalks and the replacement of existing non-brick sidewalks.
         d.   Location of Building(s) on the Lot
            i.   Parallel or Perpendicular to the Street. All building fronts shall be located on the lot parallel or perpendicular to the front lot line.
            ii.   Front Yard Building Setback. The dimension of the required front yard of a lot shall be determined by computing the average building setbacks for existing structures along the same block front. The setback line may be modified by the BAR to reflect historic patterns. The BAR shall take into consideration the setback of adjacent buildings, existing and proposed easements, lot configuration, pubic right-of-way, thoroughfare improvements, or applicable goals from Create the Vision.
            iii.   Additional building setback standards in Section 9.05, Table 9.00.
         e.   General Design Requirement for Exterior Building Architectural Elevations (Ord. 20-22)
            The general design requirement for exterior building architectural elevations shall be that the size, shape, location, materials, and architecture of all new or modified principal buildings, accessory buildings, and garages shall be visually compatible with the surrounding buildings. The requirement should also incorporate architectural features on the rear of buildings of commercial, mixed use, and multi-family residential land uses. The more detailed standards of this section of the UDO shall be used to determine the visual compatibility of a building with the surrounding buildings. The Design Review Criteria shall be used to reference architectural styles that may be prevalent in different areas of the Architectural Preservation District. The BAR may vary the architectural standards of Section 9.53, D. of the UDO to assure architectural and historic compatibility in accordance with the Design Review Criteria.
         f.   Shape of Buildings
            i.   General Shape. Buildings shall be of a simple solid, rectangular shape with corners that are clear and defined with walls that extend perpendicularly to the ground.
            ii.   Roof Shape. Buildings shall employ a sloped, pitched roof design with eaves.
            iii.   Large Building and New Addition Shape. Very large new buildings and large additions to existing buildings shall be composed of smaller rectangular building units of varied sizes grouped and attached together.
         g.   Number of Stories (Ord. 20-22)
            No new principal building or an addition to an existing principal building shall exceed four (4) stories in height. For buildings that intend to exceed two (2) stories in height, the applicant must obtain a special approval from the Board of Architectural Review. The architecture, design and layout of the proposed building that intends to exceed two (2) stories shall meet the following standards for the Board of Architectural Review's approval.
            i.   The building improvement of more than two (2) stories may not exceed the block requirements of building frontage for three or four stories in Figure 9.15.
            ii.   There must be additional accessory architectural details that complement the building design and street block. These examples include, but are not limited to, the following: cornices, dentils, soffits, vents, lentils, sills, shutters, window mullions and muntins, cupolas, railings, ornamental glass, lighting fixtures, or other architectural items adorning on and around building walls. Recesses of the building walls and planes are encouraged but not required as an architectural detail.
            iii.   Additions to historic buildings must be compatible to the historic buildings and display clear distinctions in architecture. While modern materials may be used, the design should not hinder or clutter the historic character to the original historic building.
            iv.   The application shall be consistent with the design guidelines set forth within the Design Review Criteria.
Figure 9.14 Number of Stories, APD (Ord. 20-22)
Street
Side of Street
# of properties
Building Frontage (in feet)
To
From
% of principal buildings 3 stories or higher
% of principal buildings - 4 stories
Figure 9.14 Number of Stories, APD (Ord. 20-22)
Street
Side of Street
# of properties
Building Frontage (in feet)
To
From
% of principal buildings 3 stories or higher
% of principal buildings - 4 stories
South Main Street
West
9
532
Edenhurst
Cranston
60%
20%
South Main Street
West
9
535
Cranston
Franklin
50%
10%
South Main Street
East
8
450
South Main Access
Martha
50%
10%
South Main Street
East
9
391
Martha
Franklin
50%
10%
North Main Street
West
11
193
Franklin
West Ridgeway
50%
20%
North Main Street
West
11
716
West Ridgeway
Bradstreet
40%
20%
North Main Street
West
3
139
Bradstreet
City Boundary
67%
33%
North Main Street
East
8
364
Franklin
East Ridgeway
40%
10%
North Main Street
East
8
686
East Ridgeway
Bradstreet
40%
0%
North Main Street
East
5
410
Bradstreet
Zengel
67%
40%
West Franklin Street
North
15
648
Normandy
Virginia
50%
30%
West Franklin Street
North
5
242
Virginia
Westerfiel d
30%
10%
West Franklin Street
North
10
440
Westerfiel d
Main Street
50%
0%
West Franklin Street
South
5
269
Virginia
Westerfield
40%
10%
West Franklin Street
South
9
506
Westerfiel d
Main Street
50%
0%
East Franklin Street
North
5
213
North Main
Maple
50%
0%
East Franklin Street
North
11
578
Maple
Cemetery
25%
0%
East Franklin Street
South
5
228
North Main
Maple Avenue
50%
0%
East Franklin Street
South
11
373
Maple
Edge of APD
25%
0%
Maple Avenue
West
4
47
Franklin
Irongate Park
50%
0%
Irongate Park Drive
North
7
305
Main
Maple
40%
0%
Irongate Park Drive
South
2
186
Main
Maple
75%
20%
East Ridgeway Drive
South
2
144
Main
Maple
50%
0%
Note: If a corner property is proposed to be developed where one street is not listed in this chart, the other street must be used and calculated for building frontage of three (3) or four (4) stories.
 
         h.   Width to Height Proportion
            The width and height of the front elevation of the building shall appear as a rectangle with the longest side of the rectangle being the width of the front elevation of the building.
         i.   Roofs
            i.   Design and Styles
               1)   Pitched Roof. All buildings shall have a pitched roof with eaves.
               2)   Proportion of Building Height as Roof. No more than 1/2 of the building height may appear as a roof.
               3)   Cornices. Roofs and walls shall be joined by a cornice.
               4)   Roof Styles (Ord. 20-22)
                  a.   Permitted. Gable, gambrel, flat, shed or hip roof styles shall be permitted.
                  b.   Prohibited. Mansard, false fronts, and other style roofs not specifically permitted shall be prohibited.
               5)   Roof Additions. If it is necessary to add a roof, the original roof form shall be maintained by constructing the additions as gables, dormer windows, shed dormers, or cupolas.
               6)   Removal of Architectural Features Prohibited. The stripping of roof architectural features such as dormer windows, cupolas, risers, and gables from existing roofs is prohibited.
            ii.   Materials and Texture
               1)   Roof Material. Roof material shall be in harmony with the style and features of the building.
               2)   Consistent Roof Materials. Roof materials shall be consistent over the entire roof.
               3)   Roof Texture. Roof textures shall be subtle and unobtrusive.
         j.   Chimneys and Flues
            i.   Construction Materials. Chimneys and flues shall be constructed of brick, stone or metal. Metal flues or chimneys shall be sized and located so as to be a subtle and unobtrusive element of the roof design.
            ii.   Materials Prohibited. Imitation stone or brick or metal formed to look like stone or brick is prohibited.
         k.   Walls
            i.   Design and Styles
               1)   Ground Mounted. Walls shall extend from the ground up to the roof and have clearly defined corners.
               2)   Rectangular Building Block Construction. The walls shall fit together to form simple rectangular building blocks.
               3)   Flat Walls with Square Corners. Flat walls with square corners shall be required when additions are attached to the basic building.
               4)   Styles Prohibited. Fin walls, open arcades, walls constructed in suspended cantilevered forms, and exposed frames with infill panel walls are prohibited.
            ii.   Materials, Pattern, Texture, Features, and Cleaning
               1)   Permitted Siding Materials.
                  a.   Siding used on any building must be architecturally appropriate to the period which the building was built or designed.
                  b.   Wood, brick, or stone shall be permitted as siding materials.
                  c.   Fiber cement siding may be used as an alternative to wood siding subject to approval by the BAR.
               2)   Wood Siding
                  a.   Siding Width. Siding width shall be architecturally appropriate to the building. In no case shall wood siding exceed 8 inches in overall board width.
                  b.   Construction Pattern. Wood siding shall be situated horizontally. Board and batten siding may be placed on any accessory building.
                  c.   Siding used for additions or alterations to an existing building shall match the old siding in size and texture.
                  d.   Where fiber cement siding is substituted for wood siding, final usage and finish shall be subject to approval by the BAR. Fiber Cement siding is prohibited for use on any portion of a building deemed historically significant in accordance with Section 9.45, Landmarks.
               3)   Brick Siding
                  a.   New Bricks. New bricks, that replace old bricks on an existing building or used as a siding material for an addition to an existing building, shall match the old bricks in size, color, and texture. Bricks, used in new construction, shall be situated horizontally.
                  b.   Construction Patterns for Restorations or Alterations. Bricks shall be laid in the same pattern as was used in the original structure.
                  c.   Mortar Used for Restorations or Alterations. Mortar shall duplicate the composition, color, texture, joint size, and joint profile of the original structure.
               4)   Stone Siding
                  a.   New Stone. New stone, used for the restoration of an existing building or as a siding material for an addition or alteration to an existing building, shall match the old stone in size, color, and texture.
                  b.   Construction Patterns, for Restorations or Alterations. Stone shall be laid in the same pattern as was used in the original structure.
                  c.   Mortar Used for Restorations and Alterations. Mortar shall duplicate the composition, color, texture, joint size, and joint profile of the original structure.
               5)   Types of Siding (Ord. 20-22)
                  a.   The use of aluminum, metal, or other materials that are stamped, molded, cast, rolled, or pressed, as an exterior siding material may be permitted with specific approval by the Board of Architectural Review. The proposal must meet the following standards:
                     i.   The proposal shall not be located on any historic architecture or building.
                     ii.   The application shall be consistent with the design guidelines set forth in the Design Review Criteria.
                  b.   Stone or Concrete Panels or Concrete Block Prohibited. The use of marble, granite, exposed aggregate, or other similar stone or concrete panels or the use of concrete block as a siding material shall be prohibited.
                  c.   Stucco Prohibited. The use of stucco for exterior building walls shall be prohibited.
                  d.   The use of vinyl shall be prohibited.
               6)   Trim, Sill, and Corner Boards
                  a.   The design and size of trim including fascia, sill, and corner boards shall be appropriate for the architectural style of the building.
                  b.   Natural materials such as wood, brick, or stone shall be permitted as trim materials.
                  c.   Alternative materials may be used for trim elements subject to approval by the BAR.
               7)   Special Architectural Features
                  Special architectural features such as brackets, scrollwork, railings and pediments shall be retained.
               8)   Methods of Cleaning Prohibited
                  Sandblasting or waterblasting of wood, brick, or stone or the use of chemical cleaners on limestone is prohibited.
         l.   Wall Openings (Doors and Windows)
            i.   Architectural Compatibility
               The architectural design of all wall openings (windows and doors) including the number, location, size, shape, style, trim, casing, lintel, sill, shutters, awnings, screening, storm protection, materials, and color shall be architecturally compatible with the proposed or existing building and the surrounding buildings.
            ii.   Pattern of Wall Openings
               Patterns and rhythms in window and door spacing that occur in surrounding buildings shall be incorporated into the proposed building wall planes.
            iii.   Floor Levels
               Floor levels shall be clearly indicated by the door and window arrangement and by the porch and roof design.
            iv.   Portion of the Building Front Wall Plane Area Devoted to Wall Openings
               Approximately 1/3 of the building front wall plane area shall be devoted to wall openings. Building walls containing large areas of glass shall be prohibited. Display windows located on the ground floor of commercial storefronts shall be permitted.
            v.   Projecting and Deeply Recessed Wall Openings Prohibited
               Wall which appear to be projecting or deeply recessed from the plane of the wall shall be prohibited.
            vi.   Rectangular Shaped Wall Openings
               All wall openings shall appear rectangular in shape with the width of the wall opening being the shortest side of the rectangle. Picture windows and display windows located on the ground floor shall be permitted exceptions to this requirement, if they are compatible with the surrounding building window designs.
            vii.   Arches
               Only flat or flattened (segmented) arch construction at the top of wall openings shall be permitted. Italianate, High Roman, and Gothic arches are prohibited.
         m.   Exterior Color Chart
            i.   BAR Color Chart. Any color scheme selected from the BAR color chart shall be permitted. The BAR color chart shall be available for review by the public at the City of Centerville Offices.
            ii.   Color Harmony on the Property. The color(s) used on each property shall harmonize.
            iii.   Color Compatibility with Surrounding Properties. The color(s) used on each property shall be visually compatible with those colors used on adjacent properties.
            iv.   Number of Colors. A maximum of 3 different colors; 1 base color with 2 complimentary colors, shall be used on the exterior of each building.
            v.   Natural Color and Painting of Brick or Stone. Brick or stone natural color shall be reddish, beige, or white. Yellow, gray, and salt and pepper (black and white) colored brick are prohibited. The painting or repainting of brick or stone shall be permitted, but the color shall be in accordance with the BAR color chart.
            vi.   Siding or Wall Color. Siding or wall color above the foundation line of the building shall be of a single muted, earth tone color. Bright, flashy wall colors shall be prohibited.
            vii.   Trim Color. Trim color shall be the same color as the wall or of another single color which harmonizes and contrasts with the wall color. Bright colors may be used for the trim; however, the trim color shall not clash with the wall color. Shutters or another major trim feature may be painted a third harmonizing color.
            viii.   Roof Color. Roof color shall be of a muted, subdued color that harmonizes with the other colors of the building. Bright, clashing roof colors that attract attention to the roof shall be prohibited.
         n.   Fences
            i.   Permitted. Wooden fences of solid plain vertical boards, picket fences, or split rail fences shall be permitted with all building styles. Wrought iron or cast iron fences shall be permitted with brick or wood buildings.
            ii.   Prohibited. The following fence types are prohibited:
               1)   Brick fences used with a stone building are prohibited.
               2)   Wooden fences with diagonal or basket weave board structure, or uneven tops are prohibited.
               3)   Cinder block, plaster, chain link, cyclone, and all other wire fences are prohibited.
         o.   Works of Art. Works of art that meet all of the following standards shall be permitted:
            i.   Quantity. The quantity of works of art per property shall be limited to the number that results in an uncluttered appearance to the property.
            ii.   Architectural Compatibility on Property. The size, scale, proportion, and design of the works of art shall be architecturally compatible with the other buildings, structures, and other works of art located on the property.
            iii.   Architectural Compatibility with Surrounding Properties. The work(s) of art shall be architecturally compatible with the surrounding properties.