ADU Regulations in San Juan Capistrano, California (2026)

Regulations at a glance

Local rules & notes

Illegal JADU Rental Minimums: The city's ordinance attempted to impose a 30-day minimum rental term on JADUs, which HCD determined violates state law as Gov Code 66333 does not authorize such restrictions for JADUs. Prohibited ADU Deed Restrictions: The city required deed restrictions for ADUs prior to occupancy; HCD ruled this is only permissible for JADUs, not ADUs, per Gov Code 66315. SB 1211 Multifamily ADU Bonus: New state law effective Jan 1, 2025, allows up to 8 detached ADUs on multifamily lots, provided they don't exceed the number of existing units.

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

Frequently asked questions about ADU regulations in San Juan Capistrano

• What is the maximum ADU size in San Juan Capistrano, California?

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

• What are the setback requirements for ADUs in San Juan Capistrano?

  In San Juan Capistrano, 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 San Juan Capistrano planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in San Juan Capistrano?

  In San Juan Capistrano, 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 San Juan Capistrano or county planning for your zone.

• Is ADU approval ministerial in San Juan Capistrano?

  In San Juan Capistrano, 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; San Juan Capistrano planning can confirm the exact process.

• Are there parking requirements for ADUs in San Juan Capistrano?

  In San Juan Capistrano, 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 San Juan Capistrano planning for your address.