New Detached ADU in Chino - One Fixed Price, Permits Handled

Fast, Reliable New Detached ADU Across Chino

A new detached ADU in Chino typically costs $285,000-$485,000 all-in, from the first site survey through final inspection, and most projects clear permit in 4-6 months with construction lasting 5-8 months depending on finish level. We’re Ellery ADU Studio, and our New Detached ADU in Chino work is coordinated from our Inland Empire office, with crews serving Chino neighborhoods directly. Call (951) 456-4467 to schedule your free estimate - written price before any work starts, per Haven Standard Clause 1.

Call (951) 456-4467

Why Ellery ADU Studio Chino Hills Is Chino’s Preferred New Detached ADU Company

We’ve designed, permitted, and built Garage Conversion ADUs in Chino and more across the city’s distinct lot types - from the oversized dairy-era tracts off Riverside Drive to the tighter master-planned streets of College Park. Nadia Ellery founded this studio in 2015, the year California’s ADU laws shifted, and we’ve completed 900+ ADUs since with a written price on every one.

Chino homeowners find us through referral from neighbors in the 91710 zip and through search in the College Park and Preserve areas. Our crews know the difference between a 1978 tract slab and a pre-1960 downtown foundation, and we file the party-wall notice before demolition, not after a neighbor complaint.

Dispatch and scheduling run from our Inland Empire office, but the crews on your Chino lot live and work in the western San Bernardino Valley. That matters when you’re pouring concrete in July heat or staging a conveyor truck on a 60-foot-wide lot where the front setback is already tight.

Every visit produces a documented photo record - you receive evidence of what we found and what we did, not a summary of how it felt. Under Clause 5 of The Haven Standard, the scope is locked at signing; no door-side upsells, no scope creep.

Our New Detached ADU Services in Chino

Custom Built ADU

Custom built ADUs in Chino run $320,000-$485,000 all-in, drawings through final inspection. We design the permit set in-house, then build under the same contract at the same written price. On Chino’s dairy-era lots - 10,000, 12,000, even 15,000 square feet - a custom 1,200 sq ft detached unit often clears setback and coverage limits without a variance. That’s not true in Montclair or Ontario, where comparably priced lots are half the size. We specify James Hardie cladding for the valley’s heat and UV exposure, and we size HVAC for 105°F, not “typical” Inland Empire weather.

Prefab ADU Installation

Prefab ADU installation in Chino typically ranges $285,000-$395,000, including foundation, utility tie-ins, and finish. We specify and coordinate Abodu and Cover repair in Chino systems within our single-contract model - the factory build happens offsite, but the foundation, crane set, and final connections are our scope, at one written price. On Chino’s flat lots, crane access is usually straightforward; on tighter tracts near College Park, we survey the lift radius before quoting. The Haven Standard applies to prefab exactly as it does to stick-built: written price before work starts, documented photo record on every visit, 365-Day Done Right Promise.

Modular ADU

Modular ADUs in Chino run $295,000-$420,000, depending on module count and finish level. We work with Dvele and Mighty Buildings systems, coordinating the transport from factory to your Chino lot and the set-and-stitch work on site. Modular makes sense when speed matters - the factory build runs parallel with site prep - but the permit set still has to be right. We prepare it, we file it, and we own the inspection schedule. On one recent project off Riverside Drive near downtown Chino, we pre-filed the party-wall notice and work-hour compliance plan before the modules arrived; final inspection passed on the first walk.

Studio ADU & 1-Bed & 2-Bed ADU

Studio ADUs in Chino start around $285,000 all-in; 1-bed units run $295,000-$385,000; 2-bed units run $340,000-$485,000. The dairy-to-tract legacy means even a 2-bed detached unit often fits comfortably on a standard Chino lot. We size the split-system HVAC for the San Bernardino Valley’s trapped-heat pattern, not coastal California assumptions, and we specify mechanical ventilation and filtration because Chino’s air quality makes it a code and comfort necessity, not an upgrade. Every unit receives a written price before any work starts - Haven Standard Clause 1 - and a documented photo record on every visit.

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Trusted Brands We Service in Chino

We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie - all within the same single contract. For Chino’s climate, we often lean on James Hardie fiber-cement cladding for its UV and thermal stability, and we pair it with HVAC systems sized for 100°F+ valley peaks. Our New Detached ADU team stocks common hardware and connection kits locally, so when a Chino project needs a fast adjustment, we’re not waiting on a FedEx from out of state.

Common New Detached ADU Problems We See in Chino Homes

• Staging in the front setback on a 60-foot lot. A 10-yard dumpster or material delivery parked in the front setback triggers a neighbor complaint and a stop-work notice. Chino enforces work-hour and noise ordinances tightly on tight tracts. We stage on the driveway apron or coordinate off-site laydown yards.
• Skipping the party-wall notice on a zero-lot-line side yard. The neighbor can file a civil objection that stalls the building permit even after plan check approval. We file the notice before demolition, with a compliance plan attached.
• HVAC sized for “typical” Inland Empire weather. Chino’s valley-floor position traps heat and smog; a unit sized for Riverside or Corona assumptions can’t hold 75°F in July. We run Manual J load calculations for 105°F design temps, and we specify mechanical ventilation and filtration as standard.
• Assuming lot coverage limits match neighboring cities. Chino’s dairy-era lots are unusually large and flat, but newer master-planned areas like College Park have tighter restrictions. We verify coverage and setback against the specific tract’s recorded map, not a citywide average.

Pricing for New Detached ADU in Chino, CA

We Also Serve Cities Near Chino

Our crews work throughout the western San Bernardino Valley, including Chino Hills, Corona, Ontario, and Montclair. Each city has distinct lot patterns, setback rules, and inspection schedules; we adjust the permit set and staging plan accordingly. Chino’s dairy-era lots remain the most ADU-permissive footprint in the region.

FAQs - New Detached ADU in Chino