A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Chino, CA
An ADU in Chino typically costs $180,000 to $320,000 for a detached one-bedroom unit, and most projects take 6 to 10 months from design to final inspection. Garage conversions run $95,000 to $160,000 before permit fees. Chino’s flat lots, older single-story homes from the 1950s through 1970s, and its specific zoning rules for accessory units mean the work here moves differently than in nearby hillside cities like Chino Hills. Call (361) 315-4177 to get your written price before any work starts.
Why Chino Homes Are Different
Chino sits on the flat valley floor of the western Inland Empire, and that simple fact shapes most of the ADU work we do here. The lots in neighborhoods north of Schaefer Avenue and south of the 60 Freeway are generous by Southern California standards, often 7,000 to 10,000 square feet, which gives homeowners room for a detached unit without eating their entire backyard. The housing stock is mostly single-story ranch and early mid-century construction, which means garage conversions here usually deal with older slab foundations and roof lines that were not built with living space in mind.
Clark Ranch and surrounding subdivisions have mandatory HOA approval for exterior changes, including the sight lines and siding color of any new structure. We handle that paperwork as part of the permit process. The city also enforces specific fire-safety setbacks for detached ADUs, particularly on lots that back up to the agricultural buffer zones east of Euclid Avenue. Chino’s summer heat, routinely over 100 degrees, pushes us toward higher insulation values and HVAC sizing that a coastal contractor would not spec by default.
Our Main Chino Services
Three ADU Company services account for nearly everything we build in Chino. Each has its own page with local pricing, timelines, and permit details.
Room Addition Contractor in Chino
Room additions in Chino usually mean extending an existing ranch home at the rear or converting a covered patio into conditioned space. The work requires matching roof pitch to the original structure, bringing the new footprint up to current California energy code, and, on many of Chino’s older lots, working around sewer lines that run close to the surface. Reed Calloway reviews every plan before it goes to the city. See Room Addition Contractor in Chino for cost breakdowns and a typical Chino timeline.
Garage Conversion Contractor in Chino
Chino has thousands of attached two-car garages sitting empty because the driveway is used for parking anyway. Converting one means raising the slab to meet living-space requirements, framing the garage door opening, and often upgrading the existing electrical panel to support the added load. The city requires that the conversion preserve the architectural look of the home’s front elevation, so we match stucco and roofline details from the original build. Read Garage Conversion Contractor in Chino for the full span of Chino conversion prices.
ADU Builders in Chino
Detached ADUs in Chino range from compact 400-square-foot studios to two-bedroom units with a footprint over 1,000 square feet. Chino’s Development Impact Fees apply to new detached units but are often reduced for ADUs under a set square footage, which changes the math depending on your lot. We build both conventional and prefab, so we can price a unit around your actual site conditions. Visit ADU Builders in Chino for the full cost table and the brands we install here.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in Chino
We install and finish prefab units from Abodu, Cover, and Dvele, and we handle conventional builds with Tuff Shed structures and James Hardie siding. Parts for the major platforms are staged through our Inland Empire dispatch yard, so Chino projects do not wait on long lead times. Our brands page lists the full range and what each method costs per square foot.
Pricing for ADU Company in Chino, CA
| Service | Typical range in Chino |
|---|---|
| Detached one-bedroom ADU (600 – 750 sq ft) | $180,000 – $280,000 |
| Detached two-bedroom ADU (800 – 1,000 sq ft) | $220,000 – $320,000 |
| Garage conversion (standard attached two-car) | $95,000 – $160,000 |
| Room addition (single room, 200 – 300 sq ft) | $55,000 – $95,000 |
| Room addition (primary suite, 300 – 500 sq ft) | $85,000 – $140,000 |
| Prefab ADU (Abodu, Cover, or Dvele) | $200,000 – $340,000 delivered and finished |
| Permit fees and city plan check (Chino) | $6,000 – $14,000 typically |
| Utility trenching and new subpanel | $4,000 – $9,000 |
The two things that push a Chino ADU price up most are soil conditions (expansive clay in the older parts of town) and HOA design review cycles, which add time but not cost if the plan is submitted clean. The written price we hand you before day one is the number on the final invoice. No change orders, no door-price adjustments.
Neighborhoods We Serve in Chino
We work across all of Chino, from the historic core near the civic center to the newer tracts south of Pine Avenue. Response time for an estimate visit is typically two to three business days after the initial call, depending on the week’s job load.
- Clark Ranch
- College Park
- Liberty Square
- La Cuesta Fontana
- Butterfield Ranch
Service Area – Cities Near Chino
While this page covers Chino, we also build in Norco, CA, Chino Hills, CA, Corona, CA, and Ontario, CA. Each of those pages has local pricing and permit notes for that city. Chino dispatch and scheduling coordinate out of our Inland Empire office.
Serving Chino, CA - Our Local Coverage Area
We’re based in the Chino area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Company in Chino
Yes. Every project we build in Chino is permitted through the city, and we carry the plan through every inspection. If an HOA in Clark Ranch or another community requires design review, we submit that package as well. The permit fees for a typical detached ADU in Chino run $6,000 to $14,000. Call (361) 315-4177 for an exact number on your lot.
A standard detached ADU in Chino takes 6 to 10 months from first site visit to final city sign-off. Garage conversions run 3 to 5 months. Chino’s plan check window adds about a month compared to smaller Inland Empire cities. We give you a written schedule with the written price, so the timeline is set before work starts.
That is how we work. The price goes on paper before any work begins, and the guarantee is spelled out beside it. The Garrison Standard covers workmanship defects for 365 days; if something fails within that year, we come back and fix it at no charge. Call (361) 315-4177 to set up a free estimate in Chino.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Chino Customers Say
"Room addition over the back patio. Framing is square, windows are tight, and the roofline matches."
- Danny L."Foundation and slab poured on schedule. Crew kept the yard orderly."
- Marian J."Garage conversion with a new bath and kitchenette. Permit was handled by them. Inspection passed first time."
- Sheila B.
