Why San Bernardino Homeowners Choose Ellery ADU Studio San Bernardino for ADU
Since 2015, Ellery ADU Studio has designed, permitted and built more than 900 ADUs across California with one flat price in writing before breaking ground. Here in San Bernardino, Nadia Ellery leads a team that brings that same standard to homeowners from Rialto to Redlands, with every quote documented under The Haven Standard and every crew verified before they arrive at your door.
6 Reasons We’re San Bernardino’s Top ADU Company
1. Eleven Years of ADU-Only Focus
We started in 2015, the same year California rewrote its ADU laws and the permitting backlog became the real bottleneck. While general contractors added ADUs as a sideline, we built our entire practice around them. That means we know the San Bernardino County permitting sequence, the Loma Linda flood zone requirements, and the setback quirks in Highland’s hillside zones because we’ve navigated them dozens of times. Our drawings, permit sets and construction contracts are one package with one price, because the ADUs that fail are almost always the ones where the designer and builder each point at the other.
2. A Reputation You Can Verify Block by Block
We don’t ask you to trust us blindly. Our documented record means photos and readings from every job, stored and shared with the homeowner. In Grand Terrace, a recent project required regrading for drainage compliance; we photographed the before condition, the county inspector’s sign-off, and the finished grade. In Colton, we handled a utility tie-in that the city flagged for clarification; the documentation trail showed exactly what was proposed, what was approved, and what was built. That evidence lives in our system, not in our memory.
3. Every Pro Is Required to Carry Proper Coverage
Every contractor working under our name in San Bernardino, Fontana or Riverside is required to hold the license and insurance California requires, and we verify it before they step on your property. Their license numbers are on the paperwork you sign. Haven Standard Clause 3, Verified crews, means background-checked, insured, and documented. We don’t assume; we check, and we keep the records.
4. Factory-Built Expertise With Abodu, Cover and Dvele
San Bernardino’s flat lots and mild climate make it ideal for precision factory-built units from brands like Abodu, Cover and Dvele. We’ve worked with Abodu’s permit-ready designs through San Bernardino County’s expedited review, navigated Cover’s site-specific engineering for hillside lots in Yucaipa, and coordinated Dvele’s smart-home integration with local utility programs. We don’t sell every brand; we match the manufacturer to your lot, your timeline and your budget, then handle the site prep, foundation and utility tie-ins that the factory doesn’t cover.
5. The Price on the Page Is the Price You Pay
Haven Standard Clause 1, Have it in writing, means a flat price, written scope, and written warranty before anyone starts. Your estimate lists every line item: design hours, permit fees, site work, unit delivery, finish electrical, final inspection. If we encounter unexpected soil conditions in Hesperia’s decomposed granite, we document it, photograph it, and quote the adjustment in writing before proceeding. No door upsell. No “while we’re in here.” The price range for a detached ADU in San Bernardino typically runs $180,000 to $340,000 depending on size, foundation type and utility distance; your written estimate will land somewhere specific in that range based on what we find at your site.
6. A Guarantee With Real Teeth
Haven Standard Clause 5, No surprises, is backed by a workmanship commitment that travels with your project file. If something we built doesn’t match the drawings we permitted, we fix it. The documentation we leave behind, Clause 4, becomes the reference point for both of us. Nadia Ellery reviews every project closeout personally before the final invoice goes out.
Our Promise to You
If you’re not satisfied with any aspect of our work, we don’t consider the job closed. You’ll have Nadia Ellery’s direct attention on the resolution, not a voicemail tree. Our pricing commitment is simple: the written estimate is the ceiling, not a starting bid. If we missed something in our site evaluation, that’s our cost to absorb, not yours. We answer calls Monday through Saturday, 7:30 AM to 8:00 PM weekdays and 7:30 AM to 7:00 PM Saturday and Sunday. When we schedule your work, you get a real arrival window, a named lead, and a text when they’re en route. That’s Haven Standard Clause 2, Arrive on schedule, and we treat it as seriously as the structural engineering.
Frequently Asked Questions
Most ADU problems happen at the handoff between designer and builder. We’re a design-build studio, so one contract covers your drawings, your permit set and your construction, with one flat price established upfront. Since 2015, we’ve completed over 900 ADUs with that model. Call (909) 359-6463 to schedule your free estimate and see the Haven Standard documentation for yourself.
We don’t close your project file until you’ve signed off on the final walkthrough. If something doesn’t match the permitted drawings, we correct it at our cost. Nadia Ellery reviews every dispute personally, and our documentation system means we can both refer to the same photos and measurements. Call (909) 359-6463 if you have concerns at any stage - estimates are free, and so is the conversation.
No. Your initial site evaluation and written estimate are free. We need to see your lot, check setback requirements with San Bernardino County or your city’s planning department, and identify utility access points before we can give you a real number. The estimate you receive lists every line item with a dollar range, not a single vague total. Call (909) 359-6463 to schedule yours.
Every pro working under our name in San Bernardino, Rancho Cucamonga, Moreno Valley or anywhere in our service area is required to hold the California contractor license and insurance their trade requires. We verify this before they arrive, and their license numbers appear on your contract paperwork. We don’t take their word for it; we check the CSLB records directly.
We schedule site evaluations during our operating hours: Monday through Friday 7:30 AM to 8:00 PM, Saturday and Sunday 7:30 AM to 7:00 PM. Most San Bernardino homeowners get an appointment within a few business days of calling. You’ll receive a confirmed window, not a vague “sometime next week,” and a text when our evaluator is on the way. Call (909) 359-6463 to book your slot.
Written by Nadia Ellery, Owner at Ellery ADU Studio San Bernardino, serving San Bernardino, Rialto, Colton, Grand Terrace, Highland, Redlands, Fontana, Riverside, Rancho Cucamonga, Moreno Valley, Yucaipa and Hesperia since 2015.