ADU Regulations in Calaveras County, California (2026)

Regulations at a glance

Local rules & notes

Well Water Capacity Requirements: Detailed requirements for ADUs not served by public water, requiring a source capacity report proving 5 GPM (or 2.5 GPM with storage). Simultaneous Construction / Swap: Allows a property owner to build a new home to serve as the primary dwelling while converting the existing home into the ADU. Emergency Access in SRA: Specific requirement for emergency access/egress compliance with Title 14 if located in State Responsibility Area (SRA) or high fire severity zones.

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

Frequently asked questions about ADU regulations in Calaveras County

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

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

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

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

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

  In Calaveras 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 Calaveras County or county planning for your zone.

• Is ADU approval ministerial in Calaveras County?

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

• Are there parking requirements for ADUs in Calaveras County?

  In Calaveras County, parking for ADUs is generally 1. California law often waives parking for ADUs within a half-mile of transit or in certain historic districts. Check with Calaveras County planning for your address.