ADU Regulations in Perris, California
Everything you need to know about building an ADU in Perris — size limits, setbacks, permits, and costs.
How many ADUs are allowed in Perris?
- → 1 Detached ADU (up to 1,200 sq ft)
- → 1 Attached ADU
- → 1 Junior ADU / JADU (up to 500 sq ft)
- → Up to 8 detached ADUs
- → Interior conversions up to 25% of existing units
All California cities must follow state-law minimums. Perris follows California AB 68 and subsequent ADU laws.
Perris ADU rules & limits.
| ADUs Allowed | Up to 3 units on a single-family lot (primary home + 1 ADU + 1 JADU); up to 8 detached ADUs on multifamily lots |
|---|---|
| Max ADU Size | 1,200 sq ft |
| Setbacks | 4 ft side & rear (CA state baseline) |
| Height | 16 ft detached, 25 ft attached |
| Parking | Not required in most cases; no replacement parking for garage conversions |
| JADU Allowed | Yes — up to 500 sq ft; owner-occupancy required if JADU is present |
| Impact Fees | Waived under 750 sq ft (state law) |
| Permit Timeline | 60 days maximum (state-mandated review window) |
Perris follows the California state ADU baseline. The city's older neighborhoods near downtown have generous lots but aging utilities — we verify panel capacity and sewer condition during the feasibility walk. Newer subdivisions like May Ranch and Villages of Avalon have modern infrastructure that keeps ADU buildout predictable.
Contact: Perris Building and Safety Division
City Pre-Approved ADU Plans
California AB 1332 requires all cities to offer pre-approved ADU plans. Contact the Perris Planning Department to ask about available options.
Contact Perris Building and Safety to ask about pre-approved ADU plans required under AB 1332.
Construction Station can also submit our own engineered plans — no pre-approval needed.
Pre-approved plan availability changes frequently. Always verify current programs directly with your city's Building & Safety Department before starting your project.
What could your Perris ADU earn?
Rental estimates based on current Inland Empire market rates. Actual rents vary by condition, amenities, and local demand.
Four paths to an ADU in Perris.
From idea to reveal.
Free Feasibility Consultation
We walk your lot, check setbacks and lot coverage, and confirm what your jurisdiction will approve.
Design & Engineering
Floor plan, elevations, structural calcs, and Title 24 energy compliance — drawn for your specific lot.
Permit Submission & Approval
We submit to your city or county, manage plan-check corrections, and pay the permit fees.
Construction
Same Construction Station crew handles foundation, framing, MEP, drywall, and finish — start to keys.
Final Inspection & Move-In Ready
Final city inspection, certificate of occupancy where applicable, and two-year workmanship warranty.
Why build an ADU in Perris.
Perris offers some of the best ADU economics in Riverside County: land is affordable, lots are generous, and rental demand keeps climbing with the city's growth. The March Air Reserve Base employment corridor, the massive logistics parks along I-215, Lake Perris recreation traffic, and the Metrolink 91/Perris Valley Line all feed a steady tenant pool for one- and two-bedroom units. Because Perris home prices are lower than the regional median, ADU appraisal lift as a percentage of property value is often higher here than anywhere in the county — and rental income covers a larger share of construction cost. For owners of older downtown properties, an ADU project is also the natural moment to modernize aging utilities and compound the whole parcel's value.
Ready to build an ADU in Perris?
We’ll walk your lot, confirm what Perris will allow, and ballpark cost before you commit to anything.
Perris ADU questions, answered.
How much does an ADU cost in Perris?
How long does it take to get an ADU permit in Perris?
Can I rent my ADU in Perris?
Do I need owner-occupancy for an ADU in Perris?
Does Construction Station build ADUs in Perris?
ADU regulations change frequently. Always verify current requirements with the Perris Planning Department. This page was last updated May 2026.