ADU Regulations in Watsonville, California (2026)

Regulations at a glance

Local rules & notes

Tiered Maximum Size by Lot Area: Watsonville scales the maximum allowable ADU size based on the size of the primary lot, allowing for 1,200 sq ft units on larger parcels. Prohibition of Minimum Lot Sizes: The city is prohibited by state law (AB 68) from requiring a minimum lot size for ADU permit approval.

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

Frequently asked questions about ADU regulations in Watsonville

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

  In Watsonville, the maximum ADU size is typically 1000 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; Watsonville may follow state defaults or have local limits. Verify with Watsonville planning for your specific lot.

• What are the setback requirements for ADUs in Watsonville?

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

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

  In Watsonville, 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 Watsonville or county planning for your zone.

• Is ADU approval ministerial in Watsonville?

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

• Are there parking requirements for ADUs in Watsonville?

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