ADU Regulations in Seaside, California (2026)

Regulations at a glance

Local rules & notes

ADU Plan Sets Book: The city provides pre-approved design concepts from local architects. Homeowners using these designs receive expedited permit processing. Wage Subsidy and Apprentice Program: Unique program established to provide financial assistance and labor support for ADU construction. Covered Parking Waiver: Construction of an ADU triggers a waiver for the primary residence's covered parking requirement, which is a significant zoning incentive.

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

Frequently asked questions about ADU regulations in Seaside

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

  In Seaside, the maximum ADU size is typically 800 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; Seaside may follow state defaults or have local limits. Verify with Seaside planning for your specific lot.

• What are the setback requirements for ADUs in Seaside?

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

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

  In Seaside, 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 Seaside or county planning for your zone.

• Is ADU approval ministerial in Seaside?

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

• Are there parking requirements for ADUs in Seaside?

  In Seaside, 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 Seaside planning for your address.