ADU Regulations in Los Gatos, California (2026)

Regulations at a glance

Local rules & notes

FAR Incentive Program: The town allows a ten percent increase in Floor Area Ratio (FAR) standards specifically to create opportunities for ADUs on properties with limited unbuilt FAR. Privacy Design Standards: Specific objective standards limit second-story window types and prohibit balconies, rooftop terraces, or decks for ADUs within 10 feet of a side or rear property line. Total Traffic Impact Fee Waiver: While state law only mandates impact fee waivers for units under 750 sq ft, Los Gatos currently exempts all ADUs from traffic impact fees regardless of size.

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

Frequently asked questions about ADU regulations in Los Gatos

• What is the maximum ADU size in Los Gatos, California?

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

• What are the setback requirements for ADUs in Los Gatos?

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

• What is the maximum height for an ADU in Los Gatos?

  In Los Gatos, 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 Los Gatos or county planning for your zone.

• Is ADU approval ministerial in Los Gatos?

  In Los Gatos, 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; Los Gatos planning can confirm the exact process.

• Are there parking requirements for ADUs in Los Gatos?

  In Los Gatos, 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 Los Gatos planning for your address.