An accessory dwelling unit may be attached to, or located within, the proposed or existing primary dwelling, including attached garages, storage areas or similar uses, or an accessory structure, or detached from the proposed or existing primary dwelling and located on the same lot as the proposed or existing primary dwelling.
A. Floor Area. The following floor area standards for accessory dwelling units apply:
1. The total floor area of an accessory dwelling unit shall not exceed eight hundred fifty square feet if the accessory dwelling unit has one bedroom or less, and shall not exceed one thousand square feet if the accessory dwelling unit has more than one bedroom.
2. If the accessory dwelling unit is attached to an existing primary dwelling, the maximum total floor area of the accessory dwelling unit shall be limited to the smaller of (a) the square footage specified in subsection (A)(1) of this section, or (b) fifty percent of the total floor area of the existing primary dwelling.
3. Junior accessory dwelling units shall not exceed five hundred square feet.
B. Lot Coverage. The following lot coverage standards for accessory dwelling units apply:
1. The first eight hundred square feet of either an attached or detached accessory dwelling unit will not count towards the lot coverage of the subject property. Any additional footprint after eight hundred square feet will count towards the lot coverage of the property and the lot coverage limits of the underlying zone shall apply.
2. An accessory dwelling unit constructed in the same location and to the same dimensions as an existing accessory structure that is converted to an accessory dwelling does not count towards the lot coverage of the property.
C. Minimum Setbacks. The following setback requirements apply:
1. No setback shall be required for an existing living area or accessory structure or a structure constructed in the same location and to the same dimensions as an existing structure that is converted to an accessory dwelling unit or to a portion of an accessory dwelling unit.
2. For all other accessory dwelling units, a setback of four feet from the side and rear lines shall be required, and the front setback as required in the underlying zoning designation of the subject property shall apply. Accessory dwelling units that are eight hundred square feet or less may be located within the front yard setback area of the underlying zoning designation, if there is no other area on the parcel that can accommodate the accessory dwelling unit, as determined by the director of community development; provided, that the front yard setback shall not be less than four feet.
D. Building Separation. There shall be a minimum of six feet separating all construction of the detached accessory dwelling unit from the main building(s) or other accessory structure(s) on the same lot; however, the building separation shall not preclude the development of an eight-hundred-square-foot accessory dwelling unit, per Government Code Section
66323, subdivision (a)(2).
E. Building Height. The following maximum building height limits (measured from the finished grade to the peak of the roof) apply:
1. A height of sixteen feet for a detached accessory dwelling unit on a lot with an existing or proposed single family or multifamily dwelling unit.
2. A height of eighteen feet for a detached accessory dwelling unit on a lot with an existing or proposed single family or multifamily dwelling unit that is within one-half of one mile walking distance of a major transit stop or a high-quality transit corridor, as those terms are defined in Section
21155 of the Public Resources Code. The city shall also allow an additional two feet in height to accommodate a roof pitch on the accessory dwelling unit that is aligned with the roof pitch of the primary dwelling unit.
3. A height of eighteen feet for a detached accessory dwelling unit on a lot with an existing or proposed multifamily, multistory dwelling.
4. A height of twenty-five feet or the height limitation in the city's zoning code that applies to the primary dwelling, whichever is lower, for an accessory dwelling unit that is attached to a primary dwelling. Notwithstanding the foregoing, no accessory dwelling unit shall exceed two stories.
F. No Passageway. No passageway shall be required in conjunction with the construction of an accessory dwelling unit.
G. Expansion of Existing Structure. An accessory dwelling unit created within an existing accessory structure or an existing primary dwelling may include an expansion of not more than one hundred fifty square feet beyond the same physical dimensions as the existing accessory structure or existing primary dwelling. An expansion beyond the physical limitation of the existing accessory structure or existing primary dwelling shall be limited to accommodating ingress and egress. This expansion will be exempt from local development standards.
1. Accessory structures located within parcels with a single-family dwelling are allowed to be converted and expanded to a maximum of one thousand square feet. The proposed expansion is subject to the development standards of the underlying zone.
2. Accessory structures located within parcels with multi-family dwellings are not allowed to be expanded beyond one hundred fifty square feet as listed in this subsection
G.
H. Parking. One off-street parking space shall be provided for each accessory dwelling unit. These spaces may be provided as tandem parking on a driveway. Off-street parking shall also be permitted in setback areas in locations determined by city or through tandem parking, unless specific findings are made that parking in setback areas or tandem parking is not feasible based upon specific site or regional topographical or fire and life safety conditions. Notwithstanding the foregoing, no additional parking spaces shall be required in any of the following instances:
1. When a garage, carport, covered parking structure, or uncovered parking space is demolished in conjunction with the construction of an accessory dwelling unit or converted to an accessory dwelling unit, those off-street parking spaces need not be replaced.
2. No parking is required for a junior accessory dwelling unit.
3. No parking is required for an accessory dwelling unit in any of the following circumstances:
(a) Where the accessory dwelling unit is located within one-half of one mile walking distance of public transit;
(b) Where the accessory dwelling unit is located within an architecturally and historically significant historic district;
(c) Where the accessory dwelling unit is part of the proposed or existing primary residence or an accessory structure;
(d) When on-street parking permits are required but not offered to the occupant of the accessory dwelling unit;
(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 a new multifamily dwelling on the same lot; provided, that the accessory dwelling unit or the parcel satisfies any other criteria listed in this subdivision.
I. Local Building Code Requirements. Local building code requirements that apply to detached dwellings shall apply to detached accessory dwelling units, except that the construction of an accessory dwelling unit shall not constitute a Group R occupancy change under the local building code, as described in Section 310 of the California Building Code (Title
24 of the California Code of Regulations), unless the city building official makes a written finding based on substantial evidence in the record that the construction of the accessory dwelling unit could have a specific, adverse impact on public health and safety. Nothing in this subsection shall be interpreted to prevent the city from changing the occupancy code of a space that was unhabitable space or was only permitted for nonresidential use and was subsequently converted for residential use pursuant to this chapter.
J. Private Sewage Disposal or On-Site Wastewater Treatment Systems. If a private sewage disposal system will be used in connection with the accessory dwelling unit, approval by the local health officer shall be a condition to the issuance of the permit for the accessory dwelling unit. The city may require, as part of the application for a permit to create an accessory dwelling unit connected to an on-site wastewater treatment system, a percolation test completed within the last five years, or, if the percolation test has been recertified, within the last ten years.
K. Detached Garages. A demolition permit application for a detached garage that is to be replaced with an accessory dwelling unit shall be reviewed with the application for the accessory dwelling unit, and both permits shall be issued at the same time. The applicant shall not be required to provide written notice or post a placard for the demolition of a detached garage that is to be replaced with an accessory dwelling unit, unless the property is located within an architecturally and historically significant historic district.
L. Design Standards. The following design standards shall apply to all accessory dwelling units; however, the facade limitation shall not preclude the development of an eight-hundred-square-foot or less accessory dwelling unit, per Government Code Section
66323, subdivision (a)(1) through (a)(4):
1. An attached accessory dwelling unit shall not involve any changes to existing street facing walls nor to existing floor and roof elevations.
2. This subsection shall not be interpreted to prohibit a prefabricated structure or manufactured home, as defined in Section
18007 of the California Health and Safety Code.
3. Accessory dwelling unit design shall integrate building-mounted lighting consistent with the design and character of the structure, at all proposed exterior entrances.
(a) All exterior lighting shall be shielded in a way so that no light spills onto adjacent properties.
4. The design, pitch, color, material, and texture of the roof and eave details of an accessory dwelling unit shall be substantially the same as the primary unit.
5. The color, material, and texture of all building walls, windows, and doors of an accessory dwelling unit shall be similar to and compatible with the primary unit.
6. Accessory dwelling unit's architectural style and scale shall match the primary dwelling.
7. Except for a master bedroom that leads to an exterior area, no bedroom shall have a door that leads to an exterior area.
M. Garage Conversions. Garage conversions shall be allowed subject to the following provisions:
1. No additional setback shall be required for an existing garage which is converted to an accessory dwelling unit.
2. The garage door shall be removed and replaced with a new facade. The new facade shall include a minimum of one window or entryway.
N. Junior Accessory Dwelling Units.
1. The junior accessory dwelling unit shall be fully located within the walls of an existing or proposed primary dwelling. For purposes of the preceding sentence, enclosed uses within the residence, such as attached garages, are considered a part of the proposed or existing primary dwelling.
a. A junior accessory dwelling unit may be proposed as new construction as long as all the following criteria are met:
i. Junior accessory dwelling unit is limited to five hundred square feet.
ii. Junior accessory dwelling unit is limited to a studio.
iii. New construction to accommodate a junior accessory dwelling unit is subject to all development standards applicable to the underlining zone.
2. The unit shall be no more than five hundred square feet in floor area.
3. The unit shall provide an exterior entrance separate from the primary dwelling entrance.
4. The unit may contain separate sanitation facilities or may share sanitation facilities with the primary dwelling. If those facilities are shared, the junior accessory dwelling unit shall include (in addition to the separate entrance from the main entrance to the structure as required in subsection (N)(3) of this section), an interior entry to the main living area.
5. The unit shall include an efficiency kitchen that shall include the following components:
a. A cooking facility with appliances; and
b. A food preparation counter and storage cabinets.
O. Interior Amenities. Washer/dryer hookups shall be provided within an accessory dwelling unit or the hookups may be provided within a shared common space.
P. Fire Sprinklers. Accessory dwelling units shall not be required to provide fire sprinklers if they are not required for the primary residence. The construction of an accessory dwelling unit shall not trigger a requirement for fire sprinklers to be installed in the existing dwelling.
Q. Utility Connections and Fees.
1. Accessory dwelling units shall not be considered new residential uses for the purposes of calculating city and county connection fees or capacity charges for utilities, including water and sewer service, unless the accessory dwelling unit was constructed in conjunction with a new primary dwelling.
2. For a junior accessory dwelling unit or an accessory dwelling unit located within the existing primary dwelling, a new or separate utility meter shall not be required and a related connection or capacity fee may not be charged, unless the accessory dwelling unit has been constructed with a new primary dwelling.
3. When the accessory dwelling unit is attached or detached, a new or separate utility meter shall not be required.
4. The city shall not impose any impact fee upon the development of an accessory dwelling unit less than seven hundred fifty square feet. Any impact fees charged for an accessory dwelling unit of seven hundred fifty square feet or more shall be charged proportionately in relation to the square footage of the primary dwelling unit. As used herein, "impact fee" has the same meaning as the term "fee" as defined in subdivision (b) of Government Code Section
66000, except that it also includes fees specified in Government Code Section
66477. "Impact fee" does not include any connection fee or capacity charge charged by the city or any other local agency, special district, or water corporation.
(Ord. 2021-01-CC § 3, 1-26-2021; Ord. 2025-01-CC § 1 (Exh. A), 10-14-2025)