ADU Regulations in Mendota, California (2026)

Regulations at a glance

Local rules & notes

Alley Lot Size Credit: Properties adjoining a dedicated public alley can include half the width of the alley in their total lot area calculation to meet the 5,000 sq. ft. minimum. Annual Occupancy Affidavit: Owners are required to file a yearly affidavit with the zoning administrator to prove they still reside on the property. Front Exterior Stair Prohibition: Exterior stairways for upper-floor ADUs are strictly prohibited on the front of the building to maintain neighborhood character.

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

Frequently asked questions about ADU regulations in Mendota

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

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

• What are the setback requirements for ADUs in Mendota?

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

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

  In Mendota, 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 Mendota or county planning for your zone.

• Is ADU approval ministerial in Mendota?

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

• Are there parking requirements for ADUs in Mendota?

  In Mendota, 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 Mendota planning for your address.