01 / Plan pathChoose the right production starting point.
The City runs a Pre-Approved ADU Plans Program with three floor plans from a 554-square-foot studio to a 1,001-square-foot two-bedroom, each offered in Cottage, Ranch and Spanish styles. A custom path is also available.
Express PlanStarting at $4,500For a qualifying jurisdiction preapproved plan adapted into the property-specific architectural production set.
Custom PlanStarting at $6,500For an original floor plan and architectural production set developed around the property and homeowner.
Size affects more than floor area.
City materials describe an ADU as an additional or existing space of 1,200 square feet or less relative to the single-family dwelling, with separate bathroom and kitchen facilities from the main structure.
Fees require confirmation with Building and Safety. The City has paired pre-approved plans with funding assistance to encourage ADU production.
500 SFConfirm school-fee assessment rules750 SFState impact-fee protection checkpoint1,000 SFTwo-bedroom state minimum allowance1,200 SFCommon local upper-range checkpoint
03 / Site conditionsProperty conditions can change the path.
- Whether a pre-approved plan suits the lot
- Very High Fire Hazard Severity Zone status
- Hillside and grading conditions
- Oak tree protection
- Fire access and water supply
04 / Consultant screenLikely disciplines to evaluate.
- Structural engineering
- Title 24 energy documentation
- Survey where boundaries or topography require it
- Geotechnical, civil or arborist review when triggered
Consultants are retained only when required by the property, design, or reviewing agency. Their proposals and coordination are separate from the architectural production fee unless stated otherwise in the agreement.
05 / Property-specific next stepTurn the guide into a preliminary project report.
Enter the address to screen jurisdiction, mapped constraints, likely agencies, drawing requirements, consultants, and the preliminary fee path.
Important: This guide is general planning information, not a zoning determination, permit approval, fee quote, or guarantee of feasibility. Current parcel records, adopted codes, agency interpretations, utility requirements, site investigation, and written agency confirmation control.