ADU Regulations in Moreno Valley, California (2026)

Regulations at a glance

Local rules & notes

Special District Annexation: ADU owners are required to annex into appropriate Special Districts for their area before obtaining an occupancy release. Multiple Species Habitat Conservation Fees: Prior to the issuance of a grading permit, applicants must pay specific habitat conservation fees. Stringent Fire Sprinkler Triggers: Sprinklers are required if the primary house has them, OR if the unit is 150+ feet from a street, OR if a hydrant is 400-600 feet away, OR if water flow is below 1,000 GPM.

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

Frequently asked questions about ADU regulations in Moreno Valley

• What is the maximum ADU size in Moreno Valley, California?

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

• What are the setback requirements for ADUs in Moreno Valley?

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

• What is the maximum height for an ADU in Moreno Valley?

  In Moreno Valley, 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 Moreno Valley or county planning for your zone.

• Is ADU approval ministerial in Moreno Valley?

  In Moreno Valley, 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; Moreno Valley planning can confirm the exact process.

• Are there parking requirements for ADUs in Moreno Valley?

  In Moreno Valley, 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 Moreno Valley planning for your address.