A licensed father-and-sons crew that builds ADUs across the Inland Empire. We handle design, Fontana permits, and construction — starting with a free, honest walk-through of your lot.
Permits approved in ≤60 days by CA law · Impact fees waived under 750 sq ft · Se habla español
Tell us where you are — we'll walk your lot and give you a straight answer, even if it's "don't build."
Prefer to talk? Call or text (909) 208-8655
Fontana waives its own permit fees on ADUs under 750 sq ft — on top of the statewide impact-fee waiver — and offers pre-approved plans, with a 60-day approval clock.
A 1-bedroom ADU in Fontana rents for about $1,800/month at 97% occupancy, and adds roughly $148,000 to the median home.
North Fontana's older ranch-style lots and the detached-garage tracts south of Foothill are ideal garage-conversion candidates. Newer Sierra Lakes and Coyote Canyon lots often suit a detached backyard unit instead.
| Project type | Typical investment | Timeline |
|---|---|---|
| Garage Conversion ADU | $90,000 – $150,000 | 3–5 months |
| Attached ADU | $150,000 – $250,000 | 6–10 months |
| Detached ADU (new build) | $180,000 – $280,000 | 9–14 months |
Full cost breakdown, permit timeline, financing options, and FAQ on our main ADU page →
Free feasibility walk-through — a straight answer, even if it's "don't build."
Also building ADUs in: Rancho Cucamonga · Ontario · Rialto · Riverside
