ADU Regulations in Perris, California (2026)

Regulations at a glance

Local rules & notes

ADU Production Reality Gap: The City projected 160 ADUs for the cycle (20/year), but HCD noted only 1 ADU was permitted in 2020, requiring a 'twenty-fold increase' that is currently unsupported by past performance. Extreme Minimum Lot Size Constraints: Specific plans in the city (Green Valley, New Perris, Parkwest) require massive minimum lot sizes for multifamily projects (up to 25 acres), which HCD identifies as a significant barrier to housing. Mandated ADU Specialist: HCD suggests the City establish a dedicated ADU specialist within the planning department to facilitate development.

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

Frequently asked questions about ADU regulations in Perris

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

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

• What are the setback requirements for ADUs in Perris?

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

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

  In Perris, 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 Perris or county planning for your zone.

• Is ADU approval ministerial in Perris?

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

• Are there parking requirements for ADUs in Perris?

  In Perris, 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 Perris planning for your address.