ADU Regulations in Murrieta, California
Everything you need to know about building an ADU in Murrieta — size limits, setbacks, permits, and costs.
How many ADUs are allowed in Murrieta?
- → 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. Murrieta follows California AB 68 and subsequent ADU laws.
Murrieta 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) |
ADU exterior must match the primary residence — roofing, trim, walls, windows, and color palette all subject to design review. Short-term rentals under 30 days are prohibited, and a recorded covenant prohibiting STR is required before the certificate of occupancy is issued.
Contact: Murrieta Planning: (951) 461-6063
What could your Murrieta ADU earn?
Rental estimates based on current Temecula Valley market rates. Actual rents vary by condition, amenities, and local demand.
Four paths to an ADU in Murrieta.
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 Murrieta.
Murrieta has one of the strongest long-term ADU rental markets in Riverside County. The city's population has grown rapidly and the broader Temecula Valley economy — wineries, medical facilities at Loma Linda University Medical Center–Murrieta, the Promenade Mall corridor, and steady commuter demand toward San Diego County via the 15 — all support consistent ADU tenant demand. The 25 ft attached-ADU height allowance is particularly useful for room-addition ADUs on existing two-story master-planned homes. The design-matching requirement is a meaningful constraint but it also protects the appraised value of the ADU as it integrates into the neighborhood character — done right, a Murrieta ADU looks like an original element of the home rather than a backyard add-on. Construction Station has navigated Murrieta design review before.
Ready to build an ADU in Murrieta?
We’ll walk your lot, confirm what Murrieta will allow, and ballpark cost before you commit to anything.
Murrieta ADU questions, answered.
How much does an ADU cost in Murrieta?
How long does it take to get an ADU permit in Murrieta?
Can I rent my ADU in Murrieta?
Do I need owner-occupancy for an ADU in Murrieta?
Does Construction Station build ADUs in Murrieta?
ADU regulations change frequently. Always verify current requirements with the Murrieta Planning Department at (951) 461-6063. This page was last updated May 2026.