ADU Regulations in Del Norte County, California (2026)

Regulations at a glance

Local rules & notes

Delay in Enforcement for Unpermitted Units: Owners of ADUs built before Jan 1, 2020, can request a 5-year delay in enforcement for building code violations, provided they do not threaten health and safety. Septic (OWTS) Certification Requirement: Applicants using onsite wastewater treatment must submit certification from the County Health Department confirming capacity for both the primary and ADU. Complete Parking Waiver: The city waives all off-street parking requirements for ADUs, which is more lenient than the state default (which only waives it near transit, etc.).

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

Frequently asked questions about ADU regulations in Del Norte County

• What is the maximum ADU size in Del Norte County, California?

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

• What are the setback requirements for ADUs in Del Norte County?

  In Del Norte County, 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 Del Norte County planning for overlay zones or design standards that could affect your site.

• What is the maximum height for an ADU in Del Norte County?

  In Del Norte County, 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 Del Norte County or county planning for your zone.

• Is ADU approval ministerial in Del Norte County?

  In Del Norte County, 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; Del Norte County planning can confirm the exact process.

• Are there parking requirements for ADUs in Del Norte County?

  In Del Norte County, 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 Del Norte County planning for your address.