ADU Regulations in Patterson, California (2026)

Regulations at a glance

Local rules & notes

Accessory Building on Separate Lot: An accessory building (including an ADU) may be permitted via Conditional Use Permit on a separate lot from the principal building, provided it is within 400 feet. Rural Farm Housing Multiplier: In the AG/AF district, property owners can build up to five additional residential units for family members as a matter of right, provided each occupies at least 1 acre. Substandard Lot Waiver: Lots recorded prior to the ordinance that do not meet current size or width requirements can still be used as building sites without a variance.

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

Frequently asked questions about ADU regulations in Patterson

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

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

• What are the setback requirements for ADUs in Patterson?

  In Patterson, typical setback requirements are 10 feet from the side property line and 10 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Patterson planning for overlay zones or design standards that could affect your site.

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

  In Patterson, 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 Patterson or county planning for your zone.

• Is ADU approval ministerial in Patterson?

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

• Are there parking requirements for ADUs in Patterson?

  In Patterson, 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 Patterson planning for your address.