7.1.2 Single-Family Detached House
A. Description
A single-family detached house is located on an individual lot with yards on all four sides of the house. Vehicular access can take place from the front, side, or rear of the lot.
B. Development Standards
A single-family detached house shall be permitted in accordance with the table below. A single-family detached house shall also be permitted in the RR District in accordance with the standards of paragraph 6.2.1A, Dimensional Standards.
|
Single-Family Detached Standards |
RS-20 |
RS-10 |
RS-8 |
RS-M |
RU-M |
||
|---|---|---|---|---|---|---|---|
|
Conventional Subdivision |
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|
Lot Dimensions (min. square feet) |
|||||||
|
Lot Area (w/o averaging) |
20,000 |
10,000 |
8,000 |
5,000 |
5,000 |
3,500 |
5,000 |
|
17,000 |
8,500 |
6,800 |
4,250 |
4,250 |
2,975 |
4,250 |
|
|
Lot Width (feet) |
100 |
75 |
60 |
35 |
45 |
35 |
35 |
|
Street Yard (adjoining collector or greater street) |
35 |
25 |
25 |
25 |
20 |
15 |
10 |
|
Street Yard (adjoining local street) |
35 |
25 |
25 |
20 |
20 |
15 |
10 |
|
Side Yard (single) |
12 |
10 |
9 |
6 |
6 |
6 |
6 |
|
30 |
24 |
22 |
15 |
— |
— |
— |
|
|
25 |
25 |
25 |
25 |
25 |
25 |
25 |
|
|
Cluster Subdivision |
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|
Lot Dimensions (min.) |
|||||||
|
Lot Area (square feet) |
10,000 |
5,000 |
4,000 |
— |
3,500 |
— |
— |
|
Lot Width (feet) |
75 |
40 |
40 |
— |
40 |
— |
— |
|
Yards (min. feet) |
|||||||
|
25 |
20 |
20 |
— |
15 |
— |
— |
|
|
Side Yard (single) |
9 |
6 |
6 |
— |
5 |
— |
— |
|
22 |
13 |
13 |
— |
— |
— |
— |
|
|
25 |
25 |
25 |
— |
25 |
— |
— |
|
1 Lot area with averaging may only be used if the requirements of paragraph 6.3.3C, Lot Averaging, 6.4.3C, Lot Averaging, or 6.5.3B, Lot Averaging, as appropriate, are met.
2 Yard modifications may be required pursuant to a Neighborhood Protection Overlay, or through application of infill regulations (Sec. 6.8, Infill Development in Residential Districts).
C. Small Lot Option
Additional standards, or modifications to the standards, below, may be required pursuant to a Neighborhood Protection Overlay, local historic district, or through application of infill regulations (Sec. 6.8, Infill Development in Residential Districts).
1. Applicability
The small lot option can be applied in the following zoning districts:
a. In any tier: RC, RS-M, RU-M, RU-5, and RU-5(2) zoning districts.
2. Dimensional Standards
|
Lot Dimensions |
|
|
Minimum Lot Area |
2,000 square feet |
|
Minimum Lot Width |
25 feet |
|
Yards |
|
|
Minimum Street Yard |
10 feet |
|
Minimum Individual Side Yard |
5 feet |
|
Minimum Rear Yard |
15 feet |
|
Maximum Height |
25 feet |
3. Maximum Size of Primary Structure
The maximum floor area of the primary structure shall be 1,200 square feet, with a maximum building footprint of 800 square feet. For the purpose of this paragraph, the floor area shall include garages.
4. Additional Requirements
a. Driveway Design
(1) Driveways shall be shared with a recorded shared access agreement for any pair of lots.
(2) Driveways shall be designed as a “ribbon” (a.k.a. “strip”) driveway as follows:
(i) Each strip shall be two to three feet wide with a three-foot separation.
(ii) The strips can terminate at the sidewalk or driveway apron, and to a parking pad at side or rear of the structure, to accommodate side-by-side parking or a garage entry.
KendigKeast Collaborative- Durango, CO
b. Trees
In addition to the required street tree, and in lieu of infill landscaping requirements in Sec. 6.8, if applicable, at least one canopy and one understory tree shall be planted or preserved on the lot.
(1) For tree preservation, the tree protection zone shall be maintained per paragraph 8.3.2, Protection of Existing Vegetation. Protection of invasive or other species precluded for planting pursuant to the Durham Landscape Manual shall not qualify.
(2) For tree planting, the Durham Landscape Manual shall be used to determine appropriate species and planting area.
c. Downspouts
In the Urban Tier, downspouts shall direct stormwater runoff over pervious area and not piped to right-of-way.
d. Alley Access
Where a lot abuts an improved and maintained alley, all vehicular access shall be taken from the alley.
5. Designation on Plat
Utilization of the small lot option shall be recorded on a plat at the time of approval, specifying the housing type and associated limitations.
6. Existing Single-Family Detached and Duplex Residential Structures on Small Lots
An existing single-family detached or duplex structure on a lot of record prior to the effective date of these standards can be improved pursuant to the applicable general standards for the single-family detached or duplex housing type. Such improvements may still be considered improvements or additions to a nonconforming structure pursuant to Sec. 14.4, Nonconforming Improvements and Structures.