ADU Regulations in Paso Robles, California (2026)

Regulations at a glance

Local rules & notes

Fractional Density Units: The city recognizes small units as fractions of a full unit for density calculations: Studios/1BR < 600 sqft = 0.50 unit; 1BR 601-1,000 sqft = 0.66 unit. Whichever is Greater Size Rule: Unlike most California cities that limit ADUs to the 'lesser' of two sizes, Paso Robles allows the 'greater' of 30% of the primary or 1,200 sq. ft. Connection Fee Waiver: The city has explicitly removed connection fees for ADUs to encourage production.

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

Frequently asked questions about ADU regulations in Paso Robles

• What is the maximum ADU size in Paso Robles, California?

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

• What are the setback requirements for ADUs in Paso Robles?

  In Paso Robles, typical setback requirements are 5 feet from the side property line and 20 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Paso Robles planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Paso Robles?

  In Paso Robles, the maximum height for an ADU is generally 35 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 Paso Robles or county planning for your zone.

• Is ADU approval ministerial in Paso Robles?

  In Paso Robles, 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; Paso Robles planning can confirm the exact process.

• Are there parking requirements for ADUs in Paso Robles?

  In Paso Robles, 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 Paso Robles planning for your address.