ADU Regulations in Westlake Village, California (2026)

Regulations at a glance

Local rules & notes

Affordable ADU Fee Waiver: The City explicitly states it will waive or reduce permit and development impact fees for ADUs that provide affordable housing. Pre-approved ADU Architectural Plans: The City works with the County to provide pre-approved plans to incentivize the creation of affordable ADUs. ADUs in Mixed-Use Zones: The City amended its Zoning Ordinance to specifically permit ADUs in mixed-use zones following the adoption of the North Business Park Specific Plan.

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

Frequently asked questions about ADU regulations in Westlake Village

• What is the maximum ADU size in Westlake Village, California?

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

• What are the setback requirements for ADUs in Westlake Village?

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

• What is the maximum height for an ADU in Westlake Village?

  In Westlake Village, 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 Westlake Village or county planning for your zone.

• Is ADU approval ministerial in Westlake Village?

  In Westlake Village, 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; Westlake Village planning can confirm the exact process.

• Are there parking requirements for ADUs in Westlake Village?

  In Westlake Village, 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 Westlake Village planning for your address.