ADU Regulations in Glendora, California (2026)

Regulations at a glance

Local rules & notes

Reduced Setbacks for Detached ADUs: Glendora allows 3-foot side and rear setbacks for detached ADUs, which is more permissive than the standard 4-foot setback allowed by state law. VHFHSZ Prohibition: ADUs are prohibited in Very High Fire Hazard Severity Zones unless the street is at least 26 feet wide and the site is fully mitigated. Transit Area Height Bonus: Properties within 1/2 mile of the APU/Citrus and Glendora Metro Rail Station are allowed increased height for detached ADUs (18ft + 2ft overrun).

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

Frequently asked questions about ADU regulations in Glendora

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

  In Glendora, the maximum ADU size is typically 1000 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; Glendora may follow state defaults or have local limits. Verify with Glendora planning for your specific lot.

• What are the setback requirements for ADUs in Glendora?

  In Glendora, typical setback requirements are 3 feet from the side property line and 3 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Glendora planning for overlay zones or design standards that could affect your site.

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

  In Glendora, 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 Glendora or county planning for your zone.

• Is ADU approval ministerial in Glendora?

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

• Are there parking requirements for ADUs in Glendora?

  In Glendora, 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 Glendora planning for your address.