First, check your property and get example designs:
Number of ADUs allowed:
One ADU per lot is allowed if it includes a proposed or existing single-family dwelling.
Types of ADUs allowed:
Attached, Detached or junior ADU. Conversion of existing space or new construction permitted.
No minimum lot size is imposed on ADUs other than that of the underlying zone.
A local agency may establish minimum and maximum unit size requirements for both attached and detached accessory dwelling units. No minimum or maximum size for an accessory dwelling unit, or size based upon a percentage of the proposed or existing primary dwelling, shall be established by ordinance for either attached or detached dwellings that does not permit at least an efficiency unit to be constructed in compliance with local development standards. The total area of floorspace of an attached accessory dwelling unit shall not exceed 50 percent of the proposed or existing primary dwelling LIVING area or 1,200 square feet . The total area of floorspace for a detached accessory dwelling unit shall not exceed 1,200 square feet .
No setback shall be required for an existing garage that is converted to an accessory dwelling unit or to a portion of an accessory dwelling unit, and a setback of no more than five feet from the side and rear lot lines shall be required for an accessory dwelling unit that is constructed above a garage.
Parking requirements for accessory dwelling units shall not exceed one parking space per unit or per bedroom, whichever is less. These spaces may be provided as tandem parking on a driveway.
(II) Offstreet parking shall be permitted in setback areas in locations determined by the local agency 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.
When a garage, carport, or covered parking structure is demolished in conjunction with the construction of an accessory dwelling unit or converted to an accessory dwelling unit, and the local agency requires that those offstreet parking spaces be replaced, the replacement spaces may be located in any configuration on the same lot as the accessory dwelling unit, including, but not limited to, as covered spaces, uncovered spaces, or tandem spaces, or by the use of mechanical automobile parking lifts.
Notwithstanding any other law, a local agency, whether or not it has adopted an ordinance governing accessory dwelling units in accordance with subdivision (a), shall not impose parking standards for an accessory dwelling unit in any of the following instances:
(1) The accessory dwelling unit is located within one-half mile of public transit.
(2) The accessory dwelling unit is located within an architecturally and historically significant historic district.
(3) The accessory dwelling unit is part of the proposed or existing primary dwelling or an accessory structure.
(4) When on-street parking permits are required but not offered to the occupant of the accessory dwelling unit.
(5) When there is a car share vehicle located within one block of the accessory dwelling unit.
Accessory dwelling units shall not be required to provide fire sprinklers if they are not required for the primary dwelling.
Shape, materials and style:
There are no design requirements imposed on ADUs other than those of the underlying zone.
Height of the ADU is limited to the maximum height of the zone.
When a local agency that has not adopted an ordinance governing accessory dwelling units in accordance with subdivision (a) receives an application for a permit to create an accessory dwelling unit pursuant to this subdivision, the local agency shall approve or disapprove the application ministerially without discretionary review pursuant to subdivision (a) within 120 days after receiving the application. design review. design review is NOT required for an accessory dwelling unit. design review is required for unrelated work to the site or primary dwelling, if that work requires design review for some other reason (e.g., Hillside Design District, etc.) If any work to the primary
residence requires design review, submit the completed design review application to the
Planning Counter. Remove all references to the accessory dwelling unit from the design review submittal (to the maximum extent feasible).
5. OTHER APPLICATIONS REQUIRED. Existing zoning standards may require additional
applications. If a project requests relief from applicable zoning standards please consult the Planning Counter to discuss viable options.
Number of Bedrooms:
Not specified by State Standards.
The unit may be rented separately from the primary dwelling, buy may not be sold or otherwise conveyed separate from the primary dwelling. The unit may be rented separately from the primary dwelling, buy may not be sold or otherwise conveyed separate from the primary dwelling.
Approval by the local health officer where a private sewage disposal system is being used, if required.
(1) Fees charged for the construction of accessory dwelling units shall be determined in accordance with Chapter 5 (commencing with Section 66000) and Chapter 7 (commencing with Section 66012).
(2) accessory dwelling units shall not be considered by a local agency, special district, or water corporation to be a new residential use for the purposes of calculating connection fees or capacity charges for utilities, including water and sewer service.
(A) For an accessory dwelling unit described in subdivision (e), a local agency, special district, or water corporation shall not require the applicant to install a new or separate utility connection directly between the accessory dwelling unit and the utility or impose a related connection fee or capacity charge.
The lot is zoned to allow single-family or multifamily use.
Local building code requirements that apply to detached dwellings, as appropriate.
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Community Development Department (Planning Division)
* upon completion of ADU
CONSTRUCTION COST ESTIMATE
* based on local average price per sqft
Appreciation Estimate = (Base Value: $) / (Home's Living Space: sqft) * (ADU's Living Space: sqft)
Rental Estimate = (Rent Per Sqft: $5.03) * (ADU's Living Space: sqft)
It is important to answer the first questions first, before moving into the more advanced stages of planning your project. These are questions like, what kind of ADU is allowed on my property? How large could it be? What are my goals for the project?
Our goal is to give you the tools you need to answer these questions and give you more information to help at each step of the process, regardless of the type of adu you choose or the professionals you work with to complete your project.
Pre-Planning (typically 3-12 months) Research, budgeting, pre-design, and then more research…
Start the Process (typically 3-6 months) Talk with professional contractors,designers and lenders about your project the get the ball rolling and nail down your design, costs, and timeline.
Permit and Build Your Project (typically 6-12 months) Finalize your design, submit for permits and once they are issued, you are ready to build your project!
Checking your property will give you valuable insights, tools and standardized designs, free of charge, to help you get your project started: