Cover ADU in Chino, CA | Ellery ADU Studio Ontario
We provide independent Chino ADU Design & Permitting service across Chino, from site assessment through final inspection, with one written price locked before work starts. What sets our Cover work apart here is how we factor three local constraints most out-of-area contractors miss: Chino’s dairy-legacy soils, CEC Climate Zone 10 envelope requirements, and FAA Part 77 height restrictions from Chino Airport. Call (951) 577-3472 to schedule your free estimate and receive a written line-item range.
Why Chino Residents Choose Us for Cover Service
We’ve worked alongside dozens of Cover units across the Inland Empire since 2015, the year California’s ADU laws shifted and made the math work for homeowners in ways it hadn’t before. That timing matters. We learned Cover’s build sequence, panel interfaces, and site-prep quirks on actual jobs, not in a training slideshow. We’re not manufacturer-authorized, and we don’t pretend to be. What we are is fluent in Cover’s systems and independent enough to tell you when a repair is worth doing versus when you’re better off with a different approach entirely.
Nadia Ellery grew up in Santa Monica watching her uncle rebuild a Craftsman bungalow one weekend at a time, then studied construction technology at Santa Monica College before moving into design-build work. She and our crew have spent years in Ontario’s established neighborhoods, including projects near the Ontario Mills corridor where lot sizes and older infrastructure make permit coordination the job within the job. That same discipline applies in Chino, where the agricultural-lot legacy creates opportunities most contractors from denser markets don’t recognize. The number on the page is the number we build to.
Our Cover sales & service draws from the same supply chain Cover’s own installers use for panels, structural connectors, and glazing. For insulation and HVAC, we spec locally available high-performance products rated for Zone 10 because the OEM versions often under-perform in Chino heat. Every project is governed by The Haven Standard: a written price before work starts, a documented photo record on every visit, and our 365-Day Done Right Promise backed in writing.
Common Cover ADU Problems We Solve in Chino

- Uneven settling under Cover foundation pads. Chino’s expansive dairy-clay soils, especially south of the 60 Freeway, swell and contract with seasonal moisture changes. We’ve seen cracked tile and sticking doors on several pre-2010 Cover installs where the pad wasn’t engineered for this soil type. Our fix: geotechnical assessment, over-excavation where needed, and recompaction to 95% standard Proctor before the Cover unit ever arrives.
- Insulation falling short of current Title 24. CEC Climate Zone 10 attics routinely hit 150°F+. Cover’s standard R-30 ceiling insulation in older units doesn’t meet current code for this zone. We’ve added rigid foam and radiant barrier to several Chino Cover builds, and we spec R-38 minimum on every new project we coordinate.
- Poor airflow to far bedrooms in two-bed units. Compact 8-ft ceiling panels in Cover two-bed units aren’t rated for the high-static-pressure ducts some local HVAC subs spec. In 105°F+ Chino afternoons, the far bedroom becomes a hot box. We run Manual J load calculations and size ducts to actual static pressure, not rule-of-thumb.
- Moisture wicking into subfloors on former dairy pads. Where Cover units were installed without a vapor barrier over old dairy-compacted soil, we’ve found laminate seams popping within two seasons. Our site prep includes soil testing and vapor barrier specification as standard, not optional.
- Mid-permit height redesigns from Chino Airport airspace. FAA Part 77 surfaces blanket several residential tracts. We’ve had to drop ridge height by 18 inches on projects where the overlay check came late. We run this check before locking any footprint, not after permits are submitted.
Cover Service in Chino: What Local Conditions Mean for Your Equipment
Chino’s residential neighborhoods were carved directly out of dairy and agricultural land, leaving a large share of properties, especially south of the 60 Freeway and around the historic downtown core, with unusually deep lots, often 120-150+ feet, compared to denser Inland Empire cities. This agricultural-lot legacy gives Chino homeowners outsized opportunity for full-sized detached ADUs while still retaining private yard space. But projects routinely surface legacy complications: old ag easements on titles, compacted or organically-loaded soil from prior dairy use, and existing outbuildings that trigger conversion-versus-demolition decisions before permits can proceed.
For Cover units specifically, this means the foundation pad is never a routine detail. On a deep dairy-legacy lot off Monte Vista Avenue near the historic downtown core, we placed a Cover two-bed unit but first had to run the Chino Airport Part 77 elevation check, which capped our ridge height and pushed us from a two-story to a single-story siting. During grading we hit organically loaded soil from the old dairy pad and over-excavated 14 inches, then recompacted before setting the Cover foundation. The homeowner avoided the settling issues we’d seen on neighboring Cover builds. Final Title 24 package included R-38 attic insulation and a Manual J-sized 3-ton heat pump to handle Chino’s 105°F summers. That sequence, airport check first, soil second, then unit placement, is how we approach every Chino service area project.
Cover Models & Products We Service in Chino

We specify and coordinate Cover’s full modular lineup: the Cover Two-Bed / Two-Bath modular unit, the Cover Studio / One-Bed detached unit, the Cover Two-Story where height overlay permits allow it, and the Cover Garage-Conversion variant. For panels, structural connectors, and glazing, we source Cover-compatible OEM parts through the same supply chain Cover’s own installers use. For HVAC, insulation, and finish materials, we spec locally available high-performance products rated for Zone 10 because the OEM versions often under-perform in Chino heat. Our local inventory includes radiant barrier sheathing, rigid foam board, and high-static-pressure duct fittings sized for Cover’s compact ceiling cavities. Turnaround on most Cover-compatible parts is 24-48 hours, not the two-week factory order cycle.
Cover Service Pricing in Chino
Cover ADU projects in Chino typically range from $145,000 for a studio or one-bed unit with standard site prep, to $285,000 for a two-bed modular with full grading, utility extension, and Title 24 compliance package. Our Garage Conversion ADU in Chino using Cover’s garage-adapted system usually runs $85,000-$140,000 all-in, drawings through final inspection. What drives the cost: soil conditions requiring over-excavation, utility distance from main house, HVAC upsizing for Zone 10, and whether the Chino Airport height overlay limits you to single-story.
Every estimate we deliver includes a written line-item scope with no open allowances. Under Haven Standard Clause 1, the price is locked before you sign. No change orders, no door-side upsells. Call (951) 577-3472 for your written estimate, estimates are always free.
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 - Cover ADU in Chino
Yes. FAA Part 77 airspace surfaces from Chino Airport (CNO) impose height restrictions across several established residential neighborhoods, including tracts south of the 60 Freeway and near the historic downtown core. We run the airport’s height overlay check before finalizing any Cover two-story design. Dropping ridge height by 18 inches mid-permit is a known, avoidable cost here, and we catch it in pre-design. Call (951) 577-3472 and we’ll check your specific address.
Chino sits in CEC Climate Zone 10, where summer highs exceed 105°F with no coastal marine layer to moderate. Current Title 24 requires R-38+ attic insulation and cool-roof compliance for new ADUs here, versus R-30 in milder coastal zones. Cover’s standard ceiling insulation in older units falls short. We spec rigid foam and radiant barrier upgrades rated for Zone 10 on every Chino project. Call (951) 577-3472 for a written estimate with your specific envelope line items.
Often, yes. Chino’s housing stock includes many detached or oversized garages, a holdover from the agricultural era, making garage-conversion ADUs particularly common here. Cover offers a garage-adapted variant, and we evaluate slab thickness, electrical service capacity, and whether the existing structure triggers conversion-versus-demolition rules under Chino’s municipal code. The existing slab is typically 4 inches, within range for conversion; here’s what that means for your foundation line item. Call (951) 577-3472 to schedule a site assessment.
We over-excavate and recompact. Chino’s dairy-legacy lots often contain organically loaded or compacted soil that will settle unevenly under a Cover foundation pad. Our site assessment includes soil evaluation, and if we hit it during grading, we over-excavate to stable material, typically 12-18 inches, then recompact to 95% standard Proctor before pad placement. This is standard on our Chino dairy-legacy jobs, not a change order. Call (951) 577-3472 for a written scope that includes this contingency.
Both. We’re an independent studio, not a Cover dealer, so we repair Cover units when it makes financial sense and recommend against it when it doesn’t. Panel delamination, connector corrosion, and glazing seal failures are all repairable. We’ll always tell you honestly when a repair is the better spend versus when a replacement or full custom ADU is the smarter long-term asset. Call (951) 577-3472 and we’ll assess your specific unit.
Service Areas Near Chino

We work across the western Inland Empire, including Cover service in Ontario, where lot sizes near the Mills corridor mirror Chino’s challenges, and Cover service in Eastvale, where newer master-planned communities present different soil and utility conditions. We also serve Montclair, Upland, and Mira Loma from our Ontario base.
Book Your Cover Service in Chino Today
Call (951) 577-3472 to schedule your free estimate. A live person answers 24/7. You’ll receive a written line-item price range, not a ballpark, before any work is authorized. Every project includes a documented photo record and is backed by our 365-Day Done Right Promise in writing.
Written by Nadia Ellery, Owner at Ellery ADU Studio Ontario, serving Chino and the Inland Empire since 2015.