Schedule 18.50.315: Accessory Dwelling Units and Junior Accessory Dwelling Units – Development Regulations | |||
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Unit Classification | JADU | Attached ADU | Detached ADU |
Number of Units | 1 per lot within the envelope of the primary dwelling that may also have an attached or detached ADU. | 1 per lot with a primary dwelling that may also have a JADU. With a multifamily residential use, multiple ADUs within portions of the existing structure that were not used as livable area, to no more than 25 percent of the existing dwelling units on site. | 1 per lot with a primary dwelling that may also have a JADU. With a multifamily residential use, up to 2 detached units per lot. |
Maximum Unit Size | 500 square feet | (1) Statewide Exemption ADU – Up to 800 square feet (not subject to lot coverage or FAR); (2) ADUs (not statewide exemption) subject to applicable development standards. A. Lesser of 50 percent of the primary dwelling floor area, or up to 1,200 square feet; B. Up to 850 square feet regardless of 50% limitation above; and C. Up to 1,000 square feet for more than one bedroom regardless of 50% limitation above. | (1) Statewide Exemption ADU – Up to 800 square feet (not subject to lot coverage or FAR); (2) ADUs (not statewide exemption) subject to applicable development standards. Maximum 1,200 square feet. |
Setbacks | Not applicable | (1) Not permitted within any portion of an established front yard, as defined by PMC § 18.06.745(B). Except front yard setbacks cannot preclude a Statewide Exemption ADU (up to 800 square feet) and must not unduly constrain the creation of all types of ADUs. (2) Minimum 4 feet side, corner side and/or rear yard. (3) Corner side yard setback may be necessary to maintain a sight distance triangle formed by the intersecting street lines and a line joining points on these street lines at a distance of 30 feet from the intersection of these lines if deemed necessary by traffic division for the line of sight and safety distance requirements for corner yard setbacks. | (1) Not permitted within any portion of an established front yard, as defined by PMC § 18.06.745(B). Except front yard setbacks cannot preclude a Statewide Exemption ADU (up to 800 square feet) and must not unduly constrain the creation of all types of ADUs. (2) Must be located at least 4 feet from the walls of the primary dwelling unit or an accessory structure. (3) Minimum 4 feet side, corner side and/or rear yard setback. (4) Corner side yard setback may be necessary to maintain a sight distance triangle formed by the intersecting street lines and a line joining points on these street lines at a distance of 30 feet from the intersection of these lines if deemed necessary by traffic division for the line of sight and safety distance requirements for corner yard setbacks. |
Height | Up to 25 feet with minimum roof pitch of 3:12. | (1) Up to 16 feet with minimum roof pitch of 3:12; (2) Up to 18 feet with minimum roof pitch of 3:12 within 1/2 mile walking distance of a major transit stop or a high-quality transit corridor, as those terms are defined in Public Resources Code (Section 21155), and additional two feet to accommodate a roof pitch of the accessory dwelling unit that is aligned with the roof pitch of the primary dwelling unit; (3) Up to 18 feet with minimum roof pitch of 3:12 on a lot with an existing or proposed multifamily, multi-story dwelling. | |
Exterior Appearance | The junior accessory dwelling unit shall be constructed within the walls of the proposed or existing single-family residence to be compatible with the design of the primary dwelling unit in terms of building materials, colors and exterior finishes and architectural style. | The accessory dwelling unit must be compatible with the design of the primary dwelling unit in terms of building materials, colors and exterior finishes and architectural style. | The accessory dwelling unit must be in harmony with the primary dwelling unit or convey the appearance of a single-family home. |
Conversion of an Existing Structure | An accessory structure lawfully established that does not conform to 1 or more of the development standards contained in this section may be converted to an accessory dwelling unit, provided the structure: (a) meets the criteria established in PMC § 18.50.310; and (b) may be altered up to 150 square feet as not to increase the discrepancy between the existing nonconforming conditions and the standards contained in this section; and (c) any walls within setback areas comply with applicable building and fire codes. | ||
Building Foundation | Permanent foundation required. | ||
Unit Access | The separate entrance of an attached junior accessory dwelling unit and may include an interior connection to the single-family dwelling and may be secured by a locking door. | Separate unit access required. Interior access between an attached accessory dwelling unit and the primary dwelling may be provided and may be a door equipped with a double lock. | Separate unit access required. |
Kitchen Facilities | An efficiency kitchen shall include cooking facilities and a food preparation counter with storage cabinets that are of reasonable size in relation to the size of the junior accessory dwelling unit. | Separate kitchen facilities required. | |
Sanitation Facilities | A junior accessory dwelling unit may include separate sanitation facilities, or may share sanitation facilities with the existing structure. | Separate sanitation facilities required. | |
Utility Meters | Separate gas and electric meters may be permitted if approved by the chief building official and utility provider. | ||
Required Parking | No additional parking stalls required. | 1 spacea or zerob, c | |
Notes: |
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a Required parking space(s) may be in tandem with required parking for the primary dwelling unit. |
b No additional parking shall be required for an accessory dwelling unit which meets one or more of the following: (a) is located within one-half mile of a public transit stop (in such cases, the one-half mile standard shall be based on the actual walking route between the accessory dwelling unit and the transit stop rather than on a straight line between the two points); (b) is located within an architecturally and historically significant historic district; (c) is located entirely within the proposed or existing primary dwelling or an existing accessory structure and results in no net addition of floor area on the property; (d) when on-street parking permits are required but not offered to the occupant of the accessory dwelling unit; or (e) when there is a car share vehicle located within one block of the accessory dwelling unit; or (f) when a permit application for an accessory dwelling unit is submitted with a permit application to create a new single-family dwelling or new multifamily dwelling on the same lot; provided, that the accessory dwelling unit or parcel satisfies any other criteria listed in this paragraph. |
c When a garage, carport, or covered parking structure is demolished in conjunction with the construction of an ADU or converted to an ADU, no replacement of off-street parking is required. |