RAR PREMIER BUILDERS
ADU CALCULATOR
Inland Empire ADU Builds
What can we build
in your backyard?
Enter your address and we'll show you what your lot can support, what it'll cost, how long it'll take — and how to finance it without selling your home.
Step 1 — Your home address
We pull your lot from satellite and check your city's ADU rules. Nothing is saved unless you submit the form.
Your lot · —
FEASIBILITY · WHAT'S ALLOWED ON YOUR LOT
—
MAX DETACHED ADU
1,200 sqft
HEIGHT LIMIT
16 ft
SETBACK
4 ft side/rear
IMPACT FEES
Waived <750sqft
—
Based on city ordinance summaries as of 2025. We confirm exact rules with the planning department during your feasibility consultation.
ADU Size
1,200 sqft
Studio (400)
3BR (1,200)
Finish Level
Premium
Your City
YOUR BUILD ESTIMATE
Turnkey pricing for your lot, your size, your finish.
TOTAL BUILD COST
$280K
Permit-to-keys, all-in
$ PER SQ FT
$280
Premium finish
TIMELINE
~28 weeks
RENTAL POTENTIAL
$2,800/mo
YOUR PROJECT TIMELINE
1
Feasibility & Design
On-site walkthrough, zoning confirmation, schematic plans.
2-4 wks
2
Permits & Approvals
We submit, manage corrections, and pull your permit.
6-10 wks
3
Site Prep & Foundation
Excavation, utilities, slab pour, framing kickoff.
3-4 wks
4
Build & Finish
Framing through final walk-through. You're handed keys.
12-16 wks
FINANCING IN-HOUSE · ROCA LENDING
"How do I pay for it?" — Already handled.
We work directly with ROCA Lending (NMLS #1894896) for ADU-specific financing — HELOCs, construction-to-perm, cash-out refis. Below-market rates, IE-focused. Pre-approval in 24-48 hours, no need to shop banks separately.
LET'S BUILD IT
Book your free feasibility consultation
We'll walk your property, confirm what you can build, and send you a fixed-price proposal with timeline and financing options. No pressure, no obligation.
RAR Premier Builders Inc. · Licensed General Contractor · Inland Empire
✓
Got it. Talk soon.
We'll reach out within 24 hours to schedule your on-site feasibility walkthrough. Your custom estimate PDF is ready below.
Need answers now? (951) 446-0777