A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Chino
ADU construction in Chino runs $180 – $450 per square foot depending on whether you choose a prefab unit, a custom build, or a garage conversion. A 1,200 sq ft detached ADU, which Chino’s ordinance allows on any single-family lot, typically lands between $285,000 and $410,000 when you include site work, permits, and utility connections. We coordinate scheduling from our Inland Empire office and send crews to Chino neighborhoods like Old Chino, The Preserve, and College Park every week. To talk through your lot and get a written price, call (831) 292-4191.
Why Lodgewick ADU Riverside Is Chino’s Preferred ADU Builders Company
Chino homeowners call us because we put the price in writing before any work starts, and we back every build with The Kingswell Guarantee. As a Garage Conversion Contractor - Chino, we apply the same transparency to every project type. That means a written scope, a real arrival window, a clean job site, and a 365-Day Done Right Promise in writing on every project. Russ Delmar, who leads our team, has walked hundreds of Chino lots. He knows which ranch homes on 7,000 – 10,000 sq ft lots can take a 1,200 sq ft backyard unit and which ones will need a panel upgrade or a foundation redesign before the city signs off.
Our ADU Builders team includes background-checked, uniformed crews, so you always know who’s on your property. We answer calls with a live person 24/7, not a voicemail loop. That matters when you’re two weeks into a build and have a question about a shear wall inspection. We serve Chino residents directly, with crews who know the city’s permit counter and inspection rhythm.
ADU Design in Chino
ADU Design in Chino starts with what your lot and existing home can actually support, not with a pretty rendering. A design package for a Chino ADU typically costs $4,500 – $9,800 and includes site analysis, architectural drawings, structural calculations for wind and seismic loads, and the permit set the city requires. On a 1950s ranch in Old Chino, that design phase often surfaces a panel upgrade or a septic setback issue before construction starts, which saves you from a redesign mid-build.
Site-Specific Drawings
Chino’s planning department wants drawings that match your actual lot, not a stock plan. We survey the property, mark mature trees and any leach lines, and design the ADU footprint around what’s there. You get a set of plans you can take to the city with confidence.
Structural Calcs for Wind and Seismic
Every ADU design we produce for Chino includes structural calculations stamped for the city’s current code. That means wind-rated shear wall assemblies, hold-down hardware, and foundation details that pass inspection the first time. We don’t skip this step, and cheap quotes usually do.
Backyard ADU in Chino
Backyard ADU construction in Chino means a detached unit on your existing lot, usually 600 – 1,200 sq ft, built behind the primary home. A prefab backyard ADU from a manufacturer like Abodu or Cover typically runs $180,000 – $320,000 in Chino, including delivery, site prep, foundation, utility hookups, and city inspections. A custom-built backyard unit runs higher, often $265,000 – $410,000, because it includes full architectural plans, framing on site, and custom finishes.
Prefab Backyard Units
We install Abodu and Cover units on Chino lots, which means the module is built in a factory and crane-set onto your foundation. That cuts on-site construction time to weeks instead of months. The unit still has to meet Chino’s wind-load requirements, so we verify the structural rating before we ever place an order.
Custom Backyard Cottages
A custom backyard ADU gives you full control over layout and materials. On larger Chino lots in the 1990s tract developments, we often build two-bedroom units with a separate entrance and a small porch. The cost is higher, but the rental income potential in Chino makes it pencil out for most owners.
Trusted Brands We Service in Chino
We work hands-on with James Hardie siding, Abodu prefab units, and Cover panels on Chino builds. That means you’re not paying a middleman to guess at product specs. We keep common James Hardie profiles and trim in stock for Chino jobs, which speeds up the finish work. If you already have a brand preference or want us to match an existing home’s siding profile, we’ll build that into the written quote before work begins.
Common ADU Builders Problems We See in Chino Homes
- Skipping the percolation test in Old Chino. Septic setbacks on older lots can force a redesign that shrinks the ADU below rentable size. We order the perc test during design, not after the plans are filed.
- Quoting a standard 90 mph wind rating. Chino code requires 110 mph for exposed lots near the Santa Ana wind corridor. A cheap quote leaves that off, then the plans get rejected at the building counter.
- Underestimating panel upgrades on 1950s ranch homes. Many Chino homes still run a 100A panel. A 1,200 sq ft ADU with a kitchen and mini-split usually needs 200A, and that’s a $3,500 – $6,500 line item the low bid leaves out.
- HOA approval issues in The Preserve. Some Preserve HOAs require architectural review before the city will process the permit. We prepare the submittal package so the HOA doesn’t become a delay.
Pricing for ADU Builders in Chino, CA
Here’s what we tell Chino homeowners when they ask for ballpark numbers. A studio ADU around 400 – 500 sq ft runs $105,000 – $155,000. A one-bedroom backyard unit in the 600 – 800 sq ft range lands between $170,000 and $260,000. A full 1,200 sq ft two-bedroom ADU, which Chino allows on any single-family lot, typically costs $285,000 – $410,000. A garage conversion runs lower, often $90,000 – $160,000, because the shell already exists. Your final price depends on panel upgrades, septic work, foundation type, and whether you choose prefab or custom. We give you a written line-item quote before you sign anything. Call (831) 292-4191 for a free estimate.
We Also Serve Cities Near Chino
Our crews work regularly in Chino and the surrounding area, including Mira Loma, Ontario, Montclair, and Upland. If you’re in one of those cities and considering an ADU, give us a call at (831) 292-4191. We’ll come out, walk the lot, and give you a written price.
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 Builders in Chino
Chino code requires a 110 mph wind rating for detached ADUs on exposed lots, particularly near the Santa Ana wind corridor. The rating applies to the shear wall assembly, roof-to-wall connections, and any siding product you choose. James Hardie siding carries a 110 mph wind rating when installed per spec, so we specify it on most Chino builds. Call (831) 292-4191 and we’ll verify what your specific lot requires.
Most 1950s – 70s ranch homes in Chino run a 100A panel, and yes, a 1,200 sq ft ADU with a kitchen, laundry, and mini-split typically requires a 200A service. That upgrade runs $3,500 – $6,500 depending on your meter location and whether the city requires a disconnect at the ADU. We include the line item in your written quote so it doesn’t surprise you at rough-in.
Old Chino properties on septic need a percolation test and the leach line setbacks verified before the city will accept ADU plans. If the setback pushes into your planned footprint, the ADU gets smaller or the septic field gets moved. We run the perc test during design. Call (831) 292-4191 for a lot assessment.
Some Preserve HOAs require architectural review and written approval before Chino will process your ADU permit. The HOA cannot ban ADUs outright under California law, but it can govern design, materials, and placement. We prepare the submittal package for your HOA and the city at the same time.
If your ADU is damaged in a wind event, your insurer will ask whether the structure was built to code for the area. When we build in Chino, we document every inspection and keep a compliance file on the wind-rated assembly, foundation, and connections. That file makes the claim process straightforward. Our crew in Old Chino had a customer whose ADU roof was damaged in a windstorm, and the adjuster accepted our documentation without pushback. Call (831) 292-4191 to talk about your project.
Written by Russ Delmar, Owner at Lodgewick ADU Riverside, serving Chino and the Inland Empire since 2010.
