A licensed father-and-sons crew that builds ADUs across the Inland Empire. We handle design, Rancho Cucamonga 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
Rancho Cucamonga follows the statewide rules — impact fees waived under 750 sq ft, 60-day approval, no replacement parking for garage conversions. City permit and plan-check fees typically run $2,500–$5,000.
Rancho commands the highest ADU rents in the Inland Empire: 1-bedrooms at $1,700–$2,100 and 2-bedrooms up to $2,400/month.
Alta Loma's half-acre horse lots are the best detached-ADU sites in the region; the older tracts south of Foothill Blvd have detached garages built for conversion. Foothill homes in Very High Fire zones need Chapter 7A materials — we price that up front.
| 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 →
