ADU Regulations in Healdsburg, California (2026)

Regulations at a glance

Local rules & notes

Ordinance Null and Void: HCD states that if the existing 2019 ordinance fails to meet State ADU Law requirements, it is 'null and void' and the jurisdiction must apply state standards directly. Deemed Approved Mechanism: Applications for ADUs/JADUs are deemed approved if the local agency does not act within 60 days. Amnesty for Unpermitted Units: Local agencies cannot deny permits for unpermitted ADUs built before Jan 1, 2020, unless there is a health/safety violation.

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

Frequently asked questions about ADU regulations in Healdsburg

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

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

• What are the setback requirements for ADUs in Healdsburg?

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

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

  In Healdsburg, 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 Healdsburg or county planning for your zone.

• Is ADU approval ministerial in Healdsburg?

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

• Are there parking requirements for ADUs in Healdsburg?

  In Healdsburg, 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 Healdsburg planning for your address.