ADU Regulations in Temecula, California (2026)

Regulations at a glance

Local rules & notes

Unpermitted ADU Amnesty: Local agencies are prohibited from denying a permit for an unpermitted ADU built before 2020 based on building code violations unless they are a health and safety threat. Pre-approved Plan Fast-Track: Agencies must approve or deny applications using pre-approved plans within 30 days, significantly faster than the standard 60-day window. JADU Owner-Occupancy Waiver: Under new 2026 addendum rules, if a JADU contains its own sanitation facilities, the owner-occupancy requirement is removed.

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

Frequently asked questions about ADU regulations in Temecula

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

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

• What are the setback requirements for ADUs in Temecula?

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

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

  In Temecula, 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 Temecula or county planning for your zone.

• Is ADU approval ministerial in Temecula?

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

• Are there parking requirements for ADUs in Temecula?

  In Temecula, parking for ADUs is generally false. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Temecula planning for your address.