All subdivisions and subdivision amendments shall comply with the provisions of this section. This section shall be administered by the planning director.
A. Frontage on Public Streets: All lots or parcels shall have frontage on a public street and the frontage shall comply with the minimum lot width requirements of the underlying zoning district. This standard is not applicable if Title 21A allows lots or parcels without street frontage. This provision may be modified as part of a planned development in accordance with Chapter 21A.55. Access that crosses multiple lots shall include appropriate cross access easements.
B. Buildable Areas: All subdivisions shall result in lots or parcels that provide a practically sized buildable area except for lots or parcels that are:
1. Identified as undevelopable on a subdivision plat;
2. Identified as a public park or open space;
3. Identified as a protection strip intended to prevent access across property provided the protection strip complies with the standards of this title; or
4. Intended to be used for public infrastructure.
C. Minimum Lot or Parcel Size: All lots or parcels shall comply with the minimum lot size and lot width required within the applicable zoning district or overlay district in Title 21A.
D. Lot or Parcel Shape: all lots and parcels shall generally be rectangular in shape except when one of the following conditions exist:
1. The lot or parcel shares a property line with a lot or parcel that is not part of the subject subdivision and that property line is curved, angled, or has multiple angles along the length of the property line;
2. The lot or parcel has frontage on a public right of way or private street and the boundary of the public right of way or private street is curved, angled, or has multiple angles along the length of the boundary. Side property lines shall be approximately at right angles or radial to the street line;
3. The property line follows a natural feature that includes a water way, slope over 30 degrees, rockfall area, wetland, ridge line, or other natural area that necessitates a different shape lot;
4. This standard does not apply when:
a. The shape is approved as part of a planned development;
b. The lot or parcel is a flag lot; or
c. The lot or parcel is in a special purpose zoning district other than MU Mixed Use District.
E. Double Frontage Lots: Double frontage lots are prohibited in subdivisions located in residential zoning districts.
F. Developable Area Limitation on Steep Slopes: The applicant shall provide a slope classification map with any subdivision application when the subdivision is in any foothill zoning district or open space zoning district. The slope classification map shall use a "ten-foot averaging" to determine the locations of any slope that exceeds thirty percent (30%). All slopes that are thirty percent (30%) or greater shall be considered significant steep slopes and are undevelopable. This section shall also apply to zoning map amendments that propose changing the zoning from a foothill zoning district to any other zoning district.
1. All areas of significant steep slope shall be identified as "undevelopable area" on the plat. A legal description of the undevelopable area shall also be included on the plat;
2. The boundary line of the undevelopable area shall be identified as a "transition area" on the plat. The transition area shall be a minimum of ten (10) feet;
3. Undevelopable areas shall be protected from subsequent alteration or encroachment by an open space preservation easement granted to Salt Lake City on the subdivision plat;
4. Grading, landscaping, construction activities, streets (public or private) and other disturbances of the land are prohibited within the portions of the plat designated as an undevelopable area except as follows:
a. Any construction activity necessary to provide utility access to the lot when the undevelopable area is located between the street and the developable area on a lot and there is no other legally existing location to construct the necessary public utilities. Any excavation and grading work necessary to construct necessary utilities shall be the minimum necessary and any disturbance shall be returned to its natural condition;
b. Any driveway or walkway and associated retaining walls necessary to provide access to the building area when the undevelopable area is located between the street and the developable area and there is no other legally existing location to construct the driveway, walkway, and associated retaining walls. No driveway that qualifies for this exception may exceed fifteen (15) feet in width and no walkway may exceed six (6) feet in width. All retaining walls shall comply with the applicable provisions for retaining walls found in Title 21A;
c. Exceptions listed in Subsections a. and b. shall occupy the same space unless the engineering specifications for either requires a different location. The preference of the subdivider or property owner is not a valid reason to allow separate locations; or
d. Modifications to landscaping when necessary to comply with requirements or guidelines for vegetation in wildfire interface zones as recommended by a government agency.
5. A lot that has undevelopable area within its boundaries is allowed to exceed the maximum lot size in the underlying zone without a planned development and without needing to comply with the provisions in Title 21A for exceeding maximum lot size provided:
a. The parcel has a minimum of 1,500 square feet of net buildable area. The net buildable area shall not include any areas of thirty percent (30%) or greater slope or the required zoning setbacks or the portion of the transitional area that is required that lies within the required ten foot (10') minimum setback or twenty foot (20') average setback from the proposed development limit line, as defined by the Salt Lake City Zoning Ordinance;
b. The parcel has city sewer and water services that are located or can be extended to access the lot directly from the street; or
c. The applicant must present a construction plan, acceptable to the city, which demonstrates the ability to manage staging for construction in a manner that will not impact transitional or steep slope areas; and
6. The plat shall include the following language to indicate that the developable area limitation on steep slopes shall be shown on all building permits for new buildings or structures and additions to existing buildings or structures: "The developable area limitations and all undevelopable areas shall be shown on all building permits when the building permit includes the construction of any new building or structure and additions to any existing building or structure. The undevelopable area shall not be used for any construction activity, staging, or storage during the construction process."
G. Solar Oriented Lots: For subdivisions with twenty-five (25) or more single-family residential lots at least fifty percent (50%) of lots less than 15,000 square feet, upon which detached single-family dwelling units are planned for construction, shall be oriented with the longest dimension lot line oriented towards the south to accommodate future solar panel installations on the property. Exceptions to this provision may be made by the planning director when:
1. The land that is proposed to be subdivided is along an existing street that is oriented in a manner that does not make it practical for the lots to comply with this requirement;
2. Where unusual topographic, environmental, soil, and similar conditions exist that, as determined by the planning director, make compliance with these provisions physically infeasible;
3. The property is within an existing subdivision and the proposal is a subdivision amendment; or
4. The existing lot or parcel is proposed to be modified through a lot line adjustment, parcel boundary adjustment, or consolidation. (Ord. 73-23, 2023)