ADU Regulations in Morgan Hill, California (2026)

Regulations at a glance

Local rules & notes

Pre-approved Master Plan Program: Cities can implement programs where vendors submit ADU plans for city approval, allowing homeowners to select from a catalog and receive over-the-counter permits. ADU Amnesty and Legalization: Amnesty programs help clear backlogs of unpermitted units by offering fee reductions and flexible development standards in exchange for code compliance. Impact Fee Waivers: Waiving or reducing development impact fees (system development charges) is a significant financial incentive that can dramatically increase permit applications.

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

Frequently asked questions about ADU regulations in Morgan Hill

• What is the maximum ADU size in Morgan Hill, California?

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

• What are the setback requirements for ADUs in Morgan Hill?

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

• What is the maximum height for an ADU in Morgan Hill?

  In Morgan Hill, 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 Morgan Hill or county planning for your zone.

• Is ADU approval ministerial in Morgan Hill?

  In Morgan Hill, 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; Morgan Hill planning can confirm the exact process.

• Are there parking requirements for ADUs in Morgan Hill?

  In Morgan Hill, 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 Morgan Hill planning for your address.