ADU Construction · Rialto, CA
ADU Construction in Rialto, CA
Detached ADUs, garage conversions, and junior ADUs in Rialto. Plans drawn, permits pulled, built to code by a licensed crew.
Book Free Estimate- CSLB #1083451
- Insured
- 5.0 ★ Google
- Family-owned since 2011
Why Rialto homeowners pick E-Z Contracting
Real licensing, real warranties, real crews — not a middleman with a clipboard.
Local & Licensed
CSLB #1083451, family-owned since 2011. We answer the phone and stand behind our work in writing.
Free Written Quote
Detailed line-item quote within 48 hours. The price you sign is the price you pay — no surprise change orders.
One Crew, No Subs Chain
Our own carpenters, tile setters, electricians, and painters — not a middleman hiring day-laborers.
Permits Done Right
We pull permits with the city, schedule inspections, and hand you signed-off paperwork. Resale stays clean.
How adu construction works in Rialto
Four steps from first call to final walk-through. In writing.
Free Estimate
Book online or call (909) 565-9487. We come to your Rialto home, measure, and listen — no charge, no pressure.
Written Quote
Detailed line-item quote in writing within 48 hours. Materials, labor, timeline — all spelled out.
Permits & Build
We pull Rialto permits, order materials, and build with our own licensed crew. Foundation, framing, MEP, finish — all in-house licensed crew.
Walk-Through & Warranty
Final walk-through, punch list closed, written warranty in your hand.
Recent ADU build projects
Real Rialto-area work. Real photos. Real customers.
ADU Construction FAQs · Rialto
Most Rialto ADUs run $90K–$220K depending on square footage, finish level, and whether it is detached vs. attached. Written line-item quote.
How long does a Rialto ADU build take?
Detached ADU from permit to final inspection: 5–8 months typical. Garage conversion: 3–5 months. Permitting timeline depends on the city.
What size ADU can I build in Rialto?
California state law allows up to 1,200 sq ft for a detached ADU on most lots, plus a junior ADU up to 500 sq ft. Rialto may have additional setback or height rules — we check the city code before quoting.
Do I need plans drawn?
Yes — we draw architectural plans, structural plans, Title 24 energy compliance, and submit the full package to the city for permit. All included in our scope.
Can you finance an ADU?
We do not provide financing directly, but we can refer you to local credit unions and HELOC lenders that specialize in ADU construction loans.
Do you handle utility hookups?
Yes — water, sewer, gas, and electrical sub-panel from main house or new service. Included in the scope.
ADU Construction across the Inland Empire
We also serve: Fontana · Rancho Cucamonga · Ontario · San Bernardino · Colton · Chino · Upland
Ready to start your Rialto ADU build?
Free written estimate within 48 hours. Most projects start within 2–4 weeks of signing.
Book Free Estimate