What Corona Homeowners Say About Ellery ADU Studio Corona
Reviews matter because ADUs aren’t impulse purchases. You’re letting a team into your property for months, trusting them with permits that can make or break your rental income, and betting tens of thousands that the finished unit matches what was promised. We earn trust one project at a time, through written prices, photo records, and a 365-Day Done Right Promise that we put in writing before the first shovel hits dirt in Corona.
Recent Reviews
“We had three quotes for our garage conversion on the east side of Corona, and Ellery was the only one who gave us a written line-item price upfront. Nadia walked the slab, measured the existing electrical, and pointed out the 4-inch concrete was actually within spec, so we didn’t need the $8,000 foundation upgrade another contractor had listed. The photo record from every visit let us track progress without driving across town. Permits cleared in seven weeks.”
Angela K., Corona Hills
“Our Junior ADU in the Arlington South area started as a nightmare. The previous designer had submitted plans that violated Corona’s setback rules by four feet, and we’d already paid them. Nadia did a free second opinion, redrew the layout to work within the actual property lines, and got us permitted in five weeks. The written scope under Haven Standard Clause 1 meant no surprises when we added the kitchenette line item we’d forgotten to budget.”
Eric N., Arlington South, Corona
“We went with a prefab unit from Abodu for our backyard in Sierra Del Oro, and Ellery coordinated the whole thing under one contract. Other companies wanted us to hire the manufacturer, then a separate site prep crew, then a separate utility hookup contractor. Nadia’s team handled the crane day, the sewer lateral extension, and the final inspection. One written price, one phone number, one photo record folder we still have access to.”
Jodi B., Sierra Del Oro, Corona
“The 365-Day Done Right Promise wasn’t marketing fluff. We noticed a gap between the drywall and the window frame in our detached ADU six months after move-in, called on a Saturday, and a live person answered. Crew was out Tuesday with the photo record from original install, confirmed the issue, and fixed it in two hours. No charge, no argument, no ‘that’s not in our scope’ runaround.”
Michelle N., Dos Lagos, Corona
“Corona’s fire department has specific access requirements for detached ADUs over 400 square feet, and Nadia knew them cold. She flagged the issue in our first walkthrough, adjusted the placement to maintain the 20-foot access lane, and the inspector signed off first try. The other two designers we interviewed never mentioned it. That’s the difference between someone who does ADUs here and someone who does ADUs anywhere.”
Angela K., Corona Hills
“We inherited a half-started garage conversion from a contractor who disappeared. Nadia’s team came in, documented everything that was wrong with photos, gave us a written price to fix and finish it, and didn’t charge us for the ‘diagnostic’ visit. The previous guy had used non-rated door hardware, which would have failed Corona’s fire separation inspection. Ellery caught it, fixed it, and we passed. Worth every dollar for the documentation alone.”
Eric N., Arlington South, Corona
Why Customers Trust Us
These aren’t cherry-picked stories. They’re what happens when you operate under the Haven Standard for 900-plus ADUs since 2015. Every project gets a written price before work starts, Clause 1, period. Every visit produces a documented photo record, so you’re never wondering what got done or why something costs what it does. And the 365-Day Done Right Promise means if the finished ADU doesn’t match the permitted drawings, we make it right, in writing, before we start.
Nadia Ellery runs this as an independently owned and operated studio, not a referral network. The designer and builder are the same contract, same phone number, same accountability. Our license number appears on every page because it’s verifiable, not claimed. And when you call (951) 476-3715, a live person answers, 24 hours a day, no voicemail queue, no callback that doesn’t happen.
If you have a written estimate from another Corona ADU contractor, we’ll give you a free second opinion. No obligation, no pressure. Just facts about what’s actually in the scope, what’s missing, and whether the price holds up.
Call (951) 476-3715 to schedule your free estimate.
Written by Nadia Ellery, Owner at Ellery ADU Studio Corona, serving Corona since 2015.