A licensed father-and-sons crew that builds ADUs across the Inland Empire. We handle design, Rialto 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
Rialto follows the statewide rules — impact fees waived under 750 sq ft, 60-day approvals, no parking replacement on garage conversions — with some of the lowest city permit fees in the IE (typically $2,000–$4,000).
Rialto ADUs rent for $1,500–$1,900/month — and because build costs here are among the lowest in the region, payback is often under 8 years.
Rialto's 1950s–70s tracts have large lots and detached garages on most streets — classic conversion territory. North Rialto near the foothills suits detached backyard units.
| 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: Fontana · Rancho Cucamonga · Ontario · Riverside
