ADU Regulations in Inyo County, California (2026)

Regulations at a glance

Local rules & notes

Pre-Approved ADU Program: Inyo County offers pre-approved architectural plans (e.g., 1 Bedroom B, 558 s.f.) to streamline the permitting process. Existing Solar System Exception: The ADU may utilize the main house's existing photovoltaic system if it is of sufficient size, avoiding the need for a new dedicated system. VHFHSZ Fire Sprinkler Requirement: Fire sprinklers are explicitly required if the property is in a Very High Fire Hazard Severity Zone, regardless of the primary dwelling's status.

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

Frequently asked questions about ADU regulations in Inyo County

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

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

• What are the setback requirements for ADUs in Inyo County?

  In Inyo 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 Inyo County planning for overlay zones or design standards that could affect your site.

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

  In Inyo 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 Inyo County or county planning for your zone.

• Is ADU approval ministerial in Inyo County?

  In Inyo 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; Inyo County planning can confirm the exact process.

• Are there parking requirements for ADUs in Inyo County?

  In Inyo County, 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 Inyo County planning for your address.