ADU Regulations in Belvedere, California (2026)

Regulations at a glance

Local rules & notes

Free Pre-Approved ADU Plans: The City offers free 'permit ready' ADU plans in sizes of 496, 599, and 749 square feet, including ADA compliant options, saving applicants design and engineering costs. Impact Fee Waiver: Development impact fees are eliminated for ADUs less than 750 square feet. Larger ADUs are assessed proportionally. Amnesty Program: The City has established a de facto amnesty program for unauthorized ADUs to bring them into compliance. Subsidy Program: The City is exploring funding sources to subsidize ADU construction costs for units offering affordable rents.

For the official ordinance and latest updates, check your city or county planning department.

Frequently asked questions about ADU regulations in Belvedere

• What is the maximum ADU size in Belvedere, California?

  In Belvedere, the maximum ADU size is typically 1200 square feet, depending on whether the unit is attached or detached. California state law allows up to 1,200 sq ft for detached ADUs and 800 sq ft for attached in many jurisdictions; Belvedere may follow state defaults or have local limits. Verify with Belvedere planning for your specific lot.

• What are the setback requirements for ADUs in Belvedere?

  In Belvedere, typical setback requirements are 4 feet from the side property line and 4 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Belvedere planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Belvedere?

  In Belvedere, the maximum height for an ADU is generally 16 feet. State law often allows up to 16 feet for detached ADUs and up to 25 feet when within 4 feet of the property line in some cases. Confirm with Belvedere or county planning for your zone.

• Is ADU approval ministerial in Belvedere?

  In Belvedere, ADU approval is typically Ministerial (by-right) per Gov Code §65852.2. Ministerial (by-right) review means the city must approve qualifying applications without discretionary review, per California Gov Code § 65852.2. Your project must still meet objective standards; Belvedere planning can confirm the exact process.

• Are there parking requirements for ADUs in Belvedere?

  In Belvedere, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Belvedere planning for your address.