ADU Regulations in Carpinteria, California (2026)

Regulations at a glance

Local rules & notes

Mandatory Utility Undergrounding: New detached ADUs are explicitly required to underground utilities, which can be a significant added cost. Beach Neighborhood Overlay District: Properties in this overlay are subject to discretionary review, potential technical reports (geology/flooding), and stricter parking requirements (no exemptions listed). Soils Report Requirement: Soils reports are mandatory for new structures and additions over 700 sq. ft., adding to soft costs. Coastal Development Permit: Due to location in the coastal zone, a Coastal Development Permit is required for new detached ADUs on single-family lots.

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

Frequently asked questions about ADU regulations in Carpinteria

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

  In Carpinteria, the maximum ADU size is typically 1000 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; Carpinteria may follow state defaults or have local limits. Verify with Carpinteria planning for your specific lot.

• What are the setback requirements for ADUs in Carpinteria?

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

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

  In Carpinteria, 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 Carpinteria or county planning for your zone.

• Is ADU approval ministerial in Carpinteria?

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

• Are there parking requirements for ADUs in Carpinteria?

  In Carpinteria, parking for ADUs is generally true. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Carpinteria planning for your address.