ADU Regulations in Calistoga, California (2026)

Regulations at a glance

Local rules & notes

Stricter Setbacks for New Development: While state law allows for 4-foot side and rear setbacks, this specific subdivision plan lists 5-foot setbacks for ADUs in the Rural Residential (RR) district. Front Yard Setback Enforcement: The development standards explicitly require a 20-foot front yard setback for ADUs, which is often waived in other jurisdictions if it precludes construction, but is enforced here in this greenfield development. Max Yard Coverage Limit: The development standards impose a 50% maximum yard coverage specifically for the ADU, distinct from the general lot coverage.

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

Frequently asked questions about ADU regulations in Calistoga

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

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

• What are the setback requirements for ADUs in Calistoga?

  In Calistoga, typical setback requirements are 5 feet from the side property line and 5 feet from the rear. These may be reduced to 4 feet under California Government Code § 65852.2 where applicable. Check with Calistoga planning for overlay zones or design standards that could affect your site.

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

  In Calistoga, 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 Calistoga or county planning for your zone.

• Is ADU approval ministerial in Calistoga?

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

• Are there parking requirements for ADUs in Calistoga?

  In Calistoga, 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 Calistoga planning for your address.