(A) Purpose. The purpose of these regulations is to enhance the quality and longevity of buildings in all zoning districts of the city, and to protect citizen investments in property value by ensuring complementary building style, construction, and appearance.
(B) General requirements.
(1) Consistency required. In all districts, all buildings shall be finished on all sides with consistent architectural quality, materials, and design.
(2) New materials. In recognition of the ever-changing marketplace for new finishing materials, the Community Development Department may authorize the use of materials not listed herein if it is determined that such a material is substantially similar or superior to one or more of the approved building materials.
(C) Residential district requirements.
(1) All residence districts. No metal siding shall be permitted wider than 12 inches or without a one-half inch or more overlap and relief.
(2) R-1 and R-2 Districts. A minimum of 15% of the front building façade of any structure in the R-1 or R-2 Districts, less the square footage area of windows and garage doors, shall be covered with brick or stone. Any attached or major detached accessory building that can be seen from the street shall meet this same standard when consistent with the principal structure. Structures with front facades covered by at least 70% stucco or real wood may reduce the brick or stone coverage to 5%. The Planning Commission may approve optional facade treatments prior to building permit through site plan review when additional architectural detailing so warrants. Such detailing may include usable front porches, extraordinary roof pitch or other features.
(3) R-A and T-N Districts. A minimum of 20% of the front building façade of any structure in the R-A or T-N zoning district, less the square footage area of windows and garage doors, shall be covered with brick or stone. Any attached or major detached accessory building that can be seen from the street shall meet this same standard when consistent with the principal structure. Structures with front facades covered by at least 70% stucco or real wood may reduce the brick or stone coverage to 10%.
(4) R-3 District and other districts with multiple-family housing. The R-3 and R-4 District and other districts with multiple-family housing shall be subject to building material standards as follows:
(a) All building walls facing a public street shall be covered with stone, brick, cultured masonry simulating brick or stone, or other enhanced materials to an extent not less than 20% of the exposed wall silhouette area; and
(b) Multiple-family structures of 13 or more units shall, when using lap horizontal siding, be constructed of heavy gauge steel or cement-board, with no use of vinyl or aluminum permitted. Natural wood or species that is resistant to decay may be permitted.
(5) Roofing materials. Roofing materials in residential districts, including for principal and accessory buildings, shall consist of shingles made of asphalt, fiberglass, durable rot-resistant wood (such as cedar), stone (such as slate) or architectural metal (including steel and copper). Heavy gauge steel or copper may be used for standing-seam roofing. Steel may be used only when designed to resemble traditional residential architectural roofing materials.
(D) Business district requirements. In all Business Zoning Districts (see table 3-1), the following building materials standards shall apply.
(1) No galvanized or unfinished steel, galvalum, or unfinished aluminum buildings, except those specifically designed to have a corrosive designed finish such as“corten” steel, shall be permitted in the districts listed herein.
(2) Buildings in these zoning districts shall maintain a high standard of architectural and aesthetic compatibility with conforming surrounding properties to ensure that they will not adversely impact the property values of the abutting properties and shall have a positive impact on the public health, safety, and general welfare, insofar as practicable.
(3) Exterior building finishes in the districts subject to this section shall consist of materials compatible in grade and quality to the following:
(a) Brick.
(b) Natural stone.
(c) Decorative rock face or concrete block.
(d) Cast-in-place concrete or pre-cast concrete panels.
(e) Wood, provided that the surfaces are finished for exterior use and wood of proven exterior durability is used, such as cedar, redwood, or cypress.
(f) Glass.
(g) Exterior insulated finish systems, where said system is manufactured to replicate the look of one of the approved building materials in this section.
(h) Stucco.
(4) Metal exterior finishes shall be permitted only where coordinated into the overall architectural design of the structure, such as in window and door frames, mansard roofs or parapets, and other similar features, and in no case shall constitute more than 15% of the total exterior finish of the building.
(5) Metal roofing. Metal shall be an allowed roofing material in the “B”, Business Districts, provided such material is designed to resemble traditional commercial architecture and/or is designed to complement the architectural design of the building.
(6) Building materials and design for the CCD District. All buildings within the CCD shall meet the materials and design standards of the Comprehensive Plan as defined by the Downtown Monticello Small Area Plan Amendment, the requirements of the CCD District, as well as the standards in § 153.070 for Business District requirements. In the case of a conflict between these standards, the stricter of the standards shall be applied.
(E) Industrial requirements.
(1) In the Industrial and Business Campus District (IBC), the following building materials and standards shall apply:
(a) Buildings shall maintain a high standard of architectural and aesthetic compatibility with conforming surrounding properties to ensure that they will not adversely impact the property values of the abutting properties and shall have a positive impact on the public health, safety, and general welfare, insofar as practicable.
(b) Exterior building finishes shall not consist of galvanized or unfinished steel, or unfinished aluminum.
(c) Exterior building finishes shall consist of materials compatible in grade and quality to the following:
1. Brick;
2. Natural stone;
3. Decorative rock face block or burnished block;
4. Wood, provided that the surfaces are finished for exterior use and wood of proven exterior durability is used, such as cedar, redwood, or cypress;
5. Glass;
6. Stucco or substantially similar finish product;
7. Exterior insulated finish systems, where said system is manufactured to replicate the look of one of the approved building materials in this section;
8. Cast in place concrete or pre-cast concrete panels.
(d) Metal exterior finishes shall be permitted only where coordinated into the overall architectural design of the structure, such as in window and door frames, mansard roofs or parapets, and other similar features, and in no case shall constitute more than 15% of the total exterior finish of the building.
(e) Any exterior wall adjacent to a public street must have a higher level of aesthetics. This could be accomplished by architectural design features. increased use of stone and/or brick across 15% of the facade area, combination of glass and architectural metals, or a wall plane articulation across 15% of the facade area. Such articulation must extend at least five feet from the primary building line of the principal building structure.
(2) In the Light Industrial District (I-1), the following building material standards shall apply:
(a) Exterior building finishes shall not consist of galvanized or unfinished steel, or unfinished aluminum.
(b) Any exterior wall adjacent to a public street must have a higher level of aesthetics. This could be accomplished by architectural design features, increased use of stone and/or brick across 25% of the façade area, combination of glass and architectural metals, or a wall plane articulation across 25% of the façade area. Such articulation must extend at least five feet from the primary building line of the principal building structure.
(c) Exterior building finishes shall consist of materials compatible in grade and quality to the following:
1. Brick;
2. Natural stone;
3. Decorative rock face block or burnished block;
4. Glass;
5. Stucco or substantially similar finish product;
6. Exterior insulated finish systems. where said system is manufactured to replicate the look of one of the approved building materials in this section;
7. Cast in place concrete or pre-cast concrete panels;
8. Textured finishes on metal panels to simulate stucco or other similar treatments;
9. Commercial-grade siding made of cement board. composition board, or other durable material. not including vinyl.
(3) In the Heavy Industrial (I-2) districts, the following building material standards shall apply:
(a) Exterior building finishes shall not consist of galvanized or unfinished steel, or unfinished aluminum.
(b) Any exterior wall adjacent to a public street must have a higher level of aesthetics. This could be accomplished by architectural design features, increased use of stone and/or brick across 15% of the façade area, combination of glass and architectural metals, or a wall plane articulation across 15% of the façade area. Such articulation must extend at least five feet from the primary building line of the principal building structure.
(c) Exterior building finishes shall consist of materials compatible in grade and quality to the following:
1. Brick;
2. Natural stone;
3. Decorative rock face block or burnished block;
4. Glass;
5. Stucco or substantially similar finish product;
6. Exterior Insulated Finish systems. where said system is manufactured to replicate the look of one of the approved building materials in this section;
7. Cast n place concrete or pre-cast concrete panels;
8. Textured finishes on metal panels to simulate stucco or other similar treatments;
9. Commercial-grade siding made of cement board, composition board, or other durable material, not including vinyl.
(F) Institutional requirements. All institutional uses shall adhere to the building materials requirements spelled out for commercial districts in § 153.070(D) above.
(Ord. 791, passed 11-14-2022; Ord. 799, passed 2-27-2023)