ADU Regulations in Livermore, California (2026)

Regulations at a glance

Local rules & notes

Ordinance Null and Void: HCD states the 2018 ordinance is outdated. If it fails to meet state requirements, it is 'null and void' and the city must apply state standards directly. Enforcement Delay (Amnesty): Mandatory 5-year delay in enforcement for unpermitted ADUs built before Jan 1, 2020, provided there are no health/safety issues. Deemed Approved: Applications are deemed approved if the agency does not act within 60 days.

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

Frequently asked questions about ADU regulations in Livermore

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

  In Livermore, 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; Livermore may follow state defaults or have local limits. Verify with Livermore planning for your specific lot.

• What are the setback requirements for ADUs in Livermore?

  In Livermore, 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 Livermore planning for overlay zones or design standards that could affect your site.

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

  In Livermore, 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 Livermore or county planning for your zone.

• Is ADU approval ministerial in Livermore?

  In Livermore, 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; Livermore planning can confirm the exact process.

• Are there parking requirements for ADUs in Livermore?

  In Livermore, 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 Livermore planning for your address.