ADU Regulations in Colma, California (2026)

Regulations at a glance

Local rules & notes

Fee Waivers for Single-Family Lot ADUs: Building inspection fees, plan review fees, records retention fees, and site surcharge fees are waived for ADU projects on lots containing a single-family home. (Note: Text states expiration on July 1, 2023, unless extended). Garage Demolition Notice Exemption: Written and posted notice is not required for the demolition of a detached garage that is to be replaced with an ADU, unless the property is in a historic district. Unauthorized Unit Amnesty Program: A screening and legalization process for existing unauthorized dwelling units that allows for the suspension of notices of violation and removal of liens if legalization is approved. Expedited ADU Permit Review: The City mandates approval or denial of ADU applications within 60 days if compliant with Planning Code 207.2.

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

Frequently asked questions about ADU regulations in Colma

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

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

• What are the setback requirements for ADUs in Colma?

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

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

  In Colma, 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 Colma or county planning for your zone.

• Is ADU approval ministerial in Colma?

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

• Are there parking requirements for ADUs in Colma?

  In Colma, parking for ADUs is generally Often waived per state law; check local ordinance. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Colma planning for your address.