ADU Regulations in Upland, California
Everything you need to know about building an ADU in Upland — size limits, setbacks, permits, and costs.
How many ADUs are allowed in Upland?
- → 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. Upland follows California AB 68 and subsequent ADU laws.
Upland 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 |
| 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) |
Upland follows the California state ADU baseline. Older neighborhoods south of Foothill Boulevard have mature landscaping and tree-canopy considerations that can affect detached ADU placement.
Contact: Upland Planning: (909) 931-4130
What could your Upland 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 Upland.
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 Upland.
Upland's combination of historic character, mature neighborhoods, and proximity to Claremont Colleges and Ontario employment makes it one of the more desirable Inland Empire ADU markets. Long-term rental demand is steady from Claremont graduate students, Mt. San Antonio College faculty, and professionals commuting to Pomona, Ontario, and the L.A. County job centers via the 210 freeway. ADU rents in Upland for a well-finished 600–900 sq ft one-bedroom tend to be at or above the regional median. Larger foothill lots can accommodate full 1,200 sq ft detached ADUs with room to spare; older downtown bungalow lots are stronger candidates for JADUs and garage conversions. Property appreciation has been steady in Upland for over a decade, which compounds the ADU appraisal lift over time.
Ready to build an ADU in Upland?
We’ll walk your lot, confirm what Upland will allow, and ballpark cost before you commit to anything.
Upland ADU questions, answered.
How much does an ADU cost in Upland?
How long does it take to get an ADU permit in Upland?
Can I rent my ADU in Upland?
Do I need owner-occupancy for an ADU in Upland?
Does Construction Station build ADUs in Upland?
ADU regulations change frequently. Always verify current requirements with the Upland Planning Department at (909) 931-4130. This page was last updated May 2026.