Unified Development Ordinance

Article 2.6. Additional Housing Patterns

Article 2.6. Additional Housing Patterns aaron.sheppard… Mon, 05/08/2023 - 10:05

Sec. 2.6.1. Cottage Court

Sec. 2.6.1. Cottage Court aaron.sheppard… Tue, 05/23/2023 - 09:43
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  1. Description
    A cottage court is a group of small detached houses, attached houses, townhouses (two-unit maximum per building), or tiny houses sharing a common courtyard. The courtyard enhances the character of the area through the provision of consolidated open space. A cottage court may be developed on individual lots or with a common form of ownership.
  2. Districts Allowed In
    R-2, R-4, R-6, R-10
  3. Building Types Allowed
    Detached house, attached house, townhouse (two-unit maximum per
    building), tiny house
  4. Site and Lot Dimensions
      R-2 R-4 R-6 R-10
    D1 Net site area (min) 53,200 sf 26,600 sf 16,000 sf 13,000 sf
    D2 Site Width (min) 140' 140' 120' 90'
    D3 Site Depth (min) 120'  120'  100'  90' 
    D4 Site area per non-Tiny House dwelling unit over four (min) 13,300 sf  6,650 sf  4,000 sf  2,650 sf 
    D5 Site area per Tiny House dwelling unit over four (min) 10,000 sf  5,000 sf  3,000 sf  2,000 sf 
    D6 Dwelling units per site (max) 30  30  30  30 
    D7 Dwelling unit gross floor area (max)1 1,800 sf  1,800 sf  1,800 sf  1,800 sf 
    D8 Detached accessory structure footprint (max)2 450 sf  450 sf  450 sf  450 sf 
    D9 Individual lot area (min) No min.  No min.  No min.  No min. 
    1 A Tiny House may be no larger than 800 sf in building footprint and no more than 1200 sf in gross floor area.
    2 A detached accessory structure must be less than the gross floor area of the principal dwelling.
  5. Internal Courtyard
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      R-2 R-4 R-6 R-10
    E1 Area (min)  4,000 sf  3,250 sf  2,600 sf  2,100 sf 
    E2 Width as measured parallel to primary street for first 15' of site depth (min)1  60'  50'  40'  30' 
    E3 Courtyard area per non-Tiny House unit over four (min)  1,000 sf  850 sf  700 sf  550 sf 
    E4 Courtyard area per Tiny House unit over four (min)  750 sf  425 sf  350 sf  225 sf 
    E5 Setback from primary street (max)  0'  0'  0'  0' 
    1 No portion of the minimum internal courtyard area (E1) may be less than 20 feet in width and length.
  6. Principal Building/Structure Setbacks (Site)
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      R-2 R-4 R-6 R-10
    F1 From primary street (min)  20'  20'  10'  10' 
    F2 From side street (min)  15'  15'  10'  10' 
    F3 From side site line (min)  10'  10'  10'  10' 
    F4 From rear site line (min)  20'  20'  20'  20' 
    F5 From alley (min)  5'  5'  5'  5' 
    F6 Building separation (min)  6'  6'  6'  6' 
    F7 From internal cottage court lot line (min) 3' 3' 3' 3'
    F8 From shared internal townhouse lot (min) 0' 0' 0' 0'
    Residential infill rules (Sec. 2.2.7) do not apply
  7. Surface Parking Setbacks
      R-2  R-4  R-6  R-10 
    G1 From primary street if not screened from primary street by C3 yard or principal structure (min)  90'  90'  90'  90' 
    G2 From primary street if screened from primary street by C3 yard or principal structure (min) 50'  50'  50'  50' 
    G3 From side street (min) 10'  10'  10'  10' 
    G4 From side lot line (min) 5'  5'  5'  5' 
    G5 From rear lot line (min) 5'  5'  5'  5' 
    G6 From alley (min) 0'  0'  0'  0' 
    Parking setbacks shall not apply to driveways serving individual dwelling units or shared between two dwelling units.
  8. Height
      R-2  R-4  R-6  R-10 
    H1 Non-Tiny House building height (max) 30'  30'  30'  30' 
    H2 Tiny House building height (max) 26'  26'  26'  26' 
    Residential Infill rules (Sec. 2.2.7) do not apply.
  9. Courtyard Requirements and Restrictions
    1. At least 60% of the courtyard must be one contiguous open space.
    2. Courtyard may not be parked or driven upon.
    3. One common building (detached house building type) not to exceed 3,000 square feet in gross floor area may be permitted in the courtyard under the following conditions:
      1. The common building may not be used as a dwelling.
      2. Uses within the common building must be accessory to the cottage court development.
      3. The common building shall not count towards the maximum number of dwelling units per site (Sec. 2.6.1.D.6.)
      4. Notwithstanding the forgoing, the common building must comply with all other requirements of Section 2.6.1.
    4. Inclusive of the common building, up to 20% of the minimum internal courtyard area (Sec. 2.6.1.E.1.) may be covered, however only 10% of the minimum internal courtyard area (Sec. 2.6.1.E.1.) may be enclosed.
    5. Stormwater detention wet ponds and dry ponds shall not count towards the minimum internal courtyard area (Sec. 2.6.1.E.1.) Green Stormwater Infrastructure (GSI) practices may be used to meet up to 50% of the minimum internal courtyard area (Sec. 2.6.1.E.1.)
    6. Tree Conservation Areas shall not be included as part of the minimum internal courtyard area (Sec. 2.6.1.E.1.)
    7. Retaining walls within the courtyard may be no taller than 4’ in height. Retaining walls that are 2’ or less in height may be spaced as close as 10’ apart. All other retaining walls must be spaced a minimum of 20’ apart.
    8. Pedestrian Access meeting the requirements of Section 8.3.5. shall be provided from each dwelling unit to the courtyard and any other common areas.
  10. Additional Requirements for Manufactured Homes to Qualify as Tiny Houses
    A Tiny House may be a Manufactured Home as defined Article 12.2. if it meets all of the following:
    1. The predominant roofline shall have a pitch of 5:12 or greater.
    2. The eave projections of the roof must not be less than ten inches (excluding roof gutters) unless the roof pitch is 8:12 or greater.
    3. The minimum height of the first-story exterior wall must be at least seven feet, six inches.
    4. Materials used as exterior wall covering shall be of a non-reflective material.
    5. Foundation skirting shall comply with the requirements set forth in Section 4.5.3.D.

Sec. 2.6.2. Detached House Additions

Sec. 2.6.2. Detached House Additions aaron.sheppard… Tue, 05/23/2023 - 09:44

When an existing detached house is converted to an attached or apartment building type and an addition is added to the existing building, the following regulations apply:

  1. The addition must contain the same building materials as the existing structure;
  2. The roof pitch and form of the addition shall be the same as the existing structure;
  3. The height of the addition shall not exceed the height of the existing structure;
  4. The building addition shall not cumulatively exceed 50% of the floor area of the existing structure; and
  5. Additions made after September 1, 2013, which do not comply with paragraphs A through D. above shall not be used for conversions that add one or more dwelling units.

Sec. 2.6.3. Accessory Dwelling

Sec. 2.6.3. Accessory Dwelling aaron.sheppard… Tue, 05/23/2023 - 09:44
  1. Purpose and Objectives
    The Accessory Dwelling housing pattern provides for the development of an accessory dwelling unit or units on a lot with an existing Detached House or Tiny House as an accessory use to a principal use of Single-unit Living, or on a lot with an existing Attached House, Townhouse or Tiny House as an accessory use to a principal use of Two-unit Living, or on a lot developed with an existing Townhouse as an accessory use to a principal use of Multi-unit Living.
  2. Base Standards Apply
    Except as specifically set forth in this section, the allowed uses, the dimensional requirements, height limits and general development standards of the underlying zoning district apply.
  3. Definition
    An Accessory Dwelling Unit (ADU) is a self-contained dwelling unit that is located on the same lot as a principal dwelling that meets the regulations identified in Section 2.6.3.D. An Accessory Dwelling Unit may be located above a garage. Accessory Dwelling Units may be detached, attached, or internal to the principal dwelling. Only residential uses are permitted in Accessory Dwelling Units with the exception that a Live-Work use, as defined in Sec. 6.7.3.E., may be allowed in an ADU so long as that is the only Live-Work use present on the lot. The Live-Work use must meet the definition of an accessory use to the principal residential use on the lot as described in Sec. 6.7.1.
  4. Accessory Dwelling Unit Regulations
    In accordance with this section, an accessory dwelling unit shall conform with the following development regulations:
    1. An ADU shall be located on the same lot as a principal dwelling and meet both of the following:
      1. The gross floor area of the accessory dwelling shall be less than the gross floor area of the total principal dwelling; and
      2. Shall be affixed to or constructed on a permanent foundation and not be a manufactured home or moveable structure except as specified in Sec. 2.6.3.D.6. below.
    2. There shall be no more than one ADU on the same lot as a principal dwelling unless it is located in a Frequent Transit Area as shown on the City’s Comprehensive Plan which would then allow for up to two ADUs on the same lot as a principal dwelling. However, in the Frequent Transit Area, only one ADU can be attached to the principal dwelling. In the case of a townhouse development only one ADU is permitted per townhouse lot whether within a Frequent Transit Area or not;
    3. It shall be accessed by a lockable external entrance;
    4. Ownership of an ADU shall not be transferred apart from its principal dwelling unit;
    5. It shall meet all relevant standards and requirements of the UDO, provided however accessory dwelling units shall not be subject to Sections 6.7.1. and 6.7.2. with the exception of 6.7.2.B.
    6. An Accessory Dwelling Unit may be a Manufactured Home as defined in Article 12.2 if it meets all of the following:
      1. The predominant roofline shall have a pitch of 5:12 or greater.
      2. The eave projections of the roof must not be less than ten inches (excluding roof gutters) unless the roof pitch is 8:12 or greater.
      3. The minimum height of the first-story exterior wall must be at least seven feet, six inches.
      4. Materials used as exterior wall covering shall be of a non-reflective material.
      5. Foundation skirting shall comply with the requirements set forth in Section 4.5.3.D.
      6. The Manufactured Home is no greater than 600 square feet in gross floor area.
    7. Unless attached thereto by a common wall, an ADU must be separated by at least 6’ from any other building on the lot.
    8. All ADU entrances must be externally accessible by pedestrians from either the driveway, street and/or alley from which the lot takes access.
    9. ADUs are not permitted on Flag Lots.
    10. Encroachments into setbacks are permitted pursuant to Section 1.5.4.D.
    11. Vertical encroachments are permitted pursuant to Sections 1.5.7.D.2. and 1.5.7.D.3.g.
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  5. Description An Accessory Dwelling Unit (ADU) is a self-contained dwelling unit that is located on the same lot as a principal dwelling that meets the regulations identified in Section 2.6.3.D. An ADU may be located above a garage. ADUs may be detached, attached, or internal to the principal dwelling. Only residential uses are permitted in ADUs.
  6. Districts Allowed In
    R-1, R-2, R-4, R-6, R-10
  7. Building Specifications
    Lot Area   Greater than 40,000 sf 10,000 sf to 40,000 sf Less than 10,000 sf
    G1 Gross Floor Area (max)1 1,000 sf 800 sf 800 sf
  8. Detached ADU Setbacks
    Lot Area   Greater than 40,000 sf 10,000 sf to 40,000 sf Less than 10,000 sf
    H1 From primary street (min) Must be located at or behind the front wall of the house.
    H2 From side street (min) 20' 20' 10'
    H3 From side lot line (min)2 10' 5' 5'
    H4 From rear lot line (min)3 10' 5' 5'
    H5 From alley (min) 4' without parking / 20' with parking 4' without parking / 20' with parking 4' without parking / 20' with parking
  9. Height
    Lot Area   Greater than 40,000 sf 10,000 sf to 40,000 sf Less than 10,000 sf
    I1 Overall height (max) 26' 26' 26'
    1Gross floor area shall include all conditioned space. Attached unconditioned space shall be included in the calculation of accessory structure floor area.
    2For townhouse lots, H3 shall only apply to the side site boundary.
    3For townhouse lots, H4 shall only apply to the rear site boundary.

Sec. 2.6.4. Flag Lots

Sec. 2.6.4. Flag Lots aaron.sheppard… Tue, 05/23/2023 - 09:45
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A. Districts Allowed In
A1 Zoning Districts R-4, R-6, R-10
B. Building Types Allowed
B1 Flag Lot Tiny House
B2 Residual Lot Determined by base zoning district
C. Flag Lot Dimensions Non-Frequent Transit Areas Frequent Transit Areas
C1  Lot Width (min)  10' 10'
C2  Lot Depth (min)  R-4: 70' R-4: 70'
R-6: 50' R-6: 50'
R-10: 40' R-10: 40'
C3  Lot Area (min)  3,500 sf 2,500 sf
D. Flag Lot Principal Building Setbacks
D1  From Primary Street (min)  R-4: 20' R-4: 20'
R-6: 10' R-6: 10'
R-10: 10' R-10: 10'
D2  From Side Street (min)  R-4: 20' R-4: 20'
R-6: 10' R-6: 10'
R-10: 10' R-10: 10'
D3  From Side Lot Line (min)  5' 5'
D4  Residual Lot Boundary Line (min)  5' 5'
D5  From Rear Lot Line (min)  10' 10'
D6  Setback - From Alley (min)  4' or 20' min 4' or 20' min
D7  Residential Infill Rules may apply (See Sec. 2.2.7)  no no
E. Flag Lot Driveway 
E1  Driveway Treatment  Only Ribbon style or Permeable Surface.  Only Ribbon style or Permeable Surface. 
E2  Driveway Spacing  See Sec. 8.3.5.C.2.  See Sec. 8.3.5.C.2. 
E3  Driveways and Cross Access  See Article 9.5 of the Raleigh Street Design Manual  See Article 9.5 of the Raleigh Street Design Manual 
E4  Residential Infill Rules may apply (See Sec. 2.2.7)  Yes, however driveway spacing only applicable adjacent to lots external to the flag lot subdivision.  Yes, however driveway spacing only applicable adjacent to lots external to the flag lot subdivision.

 

  R-4 R-6 R-10
F. Residual Lot Dimensions (min)
F1 Lot Width (min) 48' 33' 25'
F2 Lot Depth (min) 70' 50' 40'
G. Residual Lot Setbacks (min)
G1 Rear setback to Flag Lot (min). However, standard District Rear Yard Setbacks (min) for the Principal Structure must be maintained to all rear yard properties external to the flag lot subdivision/ recombination. 5' 5' 5'
G2 Side setback to Flag Lot Pole (min)1 5' 5' 5'
G3 Residential Infill Rules may apply (See Sec. 2.2.7) Yes Yes Yes
Unless provided for above, refer to applicable building type regulations set forth in
Articles 2.2.
1 G2 may be less than 5' if a no-build easement is recorded on the adjacent Flag Lot Pole.
The width of the setback on the residual lot plus the width of the no-build easement must
be a minimum of 10'.