ADU Regulations in Hawaiian Gardens, California (2026)

Regulations at a glance

Local rules & notes

Prohibition of Deed Restrictions: HCD explicitly states the City may not require a deed restriction for ADUs on single-family lots, which is a highly unusual finding as most cities require them. Front Setback Override: The City's ordinance attempts to enforce a 20-foot front setback. HCD clarifies this cannot be enforced if it prevents the construction of an ADU up to 800 square feet. JADU Zoning Restriction: The City attempted to allow JADUs in multifamily zones. HCD corrected this, stating JADUs are only allowed in single-family residential zones.

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

Frequently asked questions about ADU regulations in Hawaiian Gardens

• What is the maximum ADU size in Hawaiian Gardens, California?

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

• What are the setback requirements for ADUs in Hawaiian Gardens?

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

• What is the maximum height for an ADU in Hawaiian Gardens?

  In Hawaiian Gardens, 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 Hawaiian Gardens or county planning for your zone.

• Is ADU approval ministerial in Hawaiian Gardens?

  In Hawaiian Gardens, 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; Hawaiian Gardens planning can confirm the exact process.

• Are there parking requirements for ADUs in Hawaiian Gardens?

  In Hawaiian Gardens, 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 Hawaiian Gardens planning for your address.