Why Fontana Homeowners Choose Ellery ADU Studio Fontana for ADU
Since 2015, Ellery ADU Studio has designed, permitted, and built over 900 ADUs across California with a written price before every job started and a documented record when we left. Our Fontana branch, led by Nadia Ellery, brings that same Haven Standard to San Bernardino County homeowners who are tired of contractors who quote low and invoice high. We’re independently owned and operated here, with local crews who know Fontana’s Planning Department, Rialto’s setback rules, and why Bloomington lots need special attention for utility tie-ins.
6 Reasons We’re Fontana’s Top ADU Company
1. Deep Local Experience in the Inland Empire
We’ve been working in Fontana, Rialto, and Rancho Cucamonga long enough to know which permit reviewers want structural calcs on the first submittal and which ones flag landscape plans for corner lots. That knowledge cuts weeks off your timeline. We’ve navigated San Bernardino County’s fire access requirements for properties off Glen Avon roads, and we’ve solved the grading issues that come with Pedley’s hillside lots.
2. Strong Local Reputation You Can Verify
We don’t ask you to trust us blindly. Read our three-star reviews alongside the fives - you’ll see how we respond, what we fix, and how we document it. Our Fontana-area clients mention the same things: we showed up when we said we would, we texted before we arrived, and we left photos of what we actually found. That’s Haven Standard Clause 2 and Clause 4 in action.
3. Every Pro Is Required to Carry Proper License and Insurance
Every pro working under our name is required to hold the license and insurance California requires, and we put that license number on your contract page. We don’t make vague “fully insured” claims. You get a Certificate of Insurance naming you as additional insured before we break ground. Haven Standard Clause 3 means verified crews, not just warm bodies with tools.
4. Factory-Built Expertise With Cover and Dvele
We’re one of the few Fontana-area studios with direct experience quoting and permitting factory-built units from Cover and Dvele. These aren’t site-built stick frames - they’re precision-manufactured modules that arrive 80% complete. That matters on tight Ontario lots where staging space is minimal, or in Eastvale where HOA sightline rules make traditional framing a headache. We know the freight clearances for Rubidoux access roads and the crane pad requirements for Mira Loma’s softer soils.
5. Flat Pricing in Writing Before Anyone Starts
Haven Standard Clause 1 is simple: you get a written line-item quote with a real price range before we pull a permit or pour a footing. For Fontana ADUs, that typically means a design-permit-build package with every phase broken out. No “allowances” that balloon later. No “while we’re in here” upsells when the slab is open. What we quote is what you pay, and if we find something unexpected - say, unsuitable soil in a Sunnyslope backyard - we document it with photos and get your written approval before the cost changes.
6. Written Warranty and Documented Completion
Every Ellery ADU Studio job closes with a warranty document and a photo record of what we built. Haven Standard Clause 5: no surprises includes the good kind - you’ll know exactly where your shutoffs are, how your HVAC was balanced, and what the final as-built dimensions measured. If something isn’t right, we have the evidence to fix it fast instead of arguing about whose memory is correct.
Our Promise to You
If you’re not satisfied with any phase of our work, we stop and fix it before moving on. That’s not a slogan; it’s how our contracts are structured, with holdback points at design approval, permit issuance, rough inspection, and final walkthrough. We answer calls Monday through Friday, 7:00 AM to 7:00 PM, and Sunday from 7:00 AM to 7:00 PM. Our pricing transparency commitment means every quote shows labor, materials, permits, and fees as separate line items. You’ll never see a single lump number with a trust-us shrug. If we miss a window or a named technician doesn’t arrive, we document why and adjust the schedule in writing. No ghosting, no “we’ll be there sometime Tuesday.”
Before
AfterFrequently Asked Questions
Most ADU projects fail at the handoff between designer and builder, because each can blame the other when costs spike or timelines slip. We’re a design-build studio - one contract, one price, one team accountable from sketch to certificate of occupancy. Since 2015, we’ve refined that process across 900-plus ADUs, and Nadia Ellery’s Fontana team applies it with local knowledge of San Bernardino County’s specific requirements. Call (909) 637-3715 to schedule your free estimate and see the difference.
We stop and resolve the issue before continuing. Our contract includes structured holdback points, so you retain leverage at every phase. Haven Standard Clause 5 requires us to document what we found and what we did, which means disputes don’t devolve into he-said-she-said. If something’s genuinely wrong, we have the photos and measurements to identify it and fix it. Call (909) 637-3715 - we’ll walk you through the exact warranty language before you sign anything.
No. Our initial site visit and written estimate are free. We’ll measure your lot, check setbacks against Fontana’s current zoning map, and give you a real price range for your specific project - not a generic per-square-foot guess. The estimate includes a preliminary permit timeline based on current San Bernardino County queue lengths. Call (909) 637-3715 to schedule yours; estimates are free.
Yes. Every pro working under our name is required to hold the California contractor license and insurance their trade requires, and we provide that documentation before work begins. We’re not a referral network passing your job to unvetted subs. The license number appears on your contract, and you’re named as additional insured on our Certificate of Insurance. Call (909) 637-3715 and we’ll confirm the details for your specific project.
We schedule site visits during our operating hours: Monday through Friday 7:00 AM to 7:00 PM, and Sunday 7:00 AM to 7:00 PM. We’re closed Saturday. Most Fontana, Rialto, and Bloomington homeowners get an appointment within a week of calling. We’ll text you when our estimator is en route, and you’ll receive your written line-item quote within two business days of the visit. Call (909) 637-3715 to check current availability - estimates are free.
Written by Nadia Ellery, Owner at Ellery ADU Studio Fontana, serving Fontana, Rialto, Bloomington, Rancho Cucamonga, Glen Avon, Sunnyslope, Rubidoux, Pedley, Mira Loma, Ontario, Upland, and Eastvale since 2015.