Why Garden Grove Homeowners Choose Ellery ADU Studio Garden Grove for ADU
Since 2015, Ellery ADU Studio has designed, permitted, and built more than 900 ADUs across California, every one with a written price before ground broke and a documented record when we left. Our Garden Grove branch, led by Nadia Ellery, brings that same Haven Standard to Orange County homeowners who are tired of the designer-builder blame game and want one contract, one price, and one team accountable from sketch to final inspection.
6 Reasons We’re Garden Grove’s Top ADU Company
1. We’ve Been at This Since California’s ADU Laws Changed
Ellery ADU Studio opened in 2015, the same year California rewrote its accessory dwelling unit laws and the permitting queue became the real product. We’ve spent eleven years learning what actually gets plans through Garden Grove’s planning department, what triggers a resubmission, and how to avoid the six-month delays that kill budgets. That timing wasn’t luck. It was the decision to build a design-build studio rather than a conventional contractor, so the drawings, the permit set, and the construction live under one roof with one point of accountability.
2. Our Reputation Is Built on Documentation, Not Claims
Homeowners in Westminster, Fountain Valley, and across our service area tell us the same thing: they chose us because we showed them photos, permit approvals, and written scopes from past jobs before they signed. The Haven Standard’s Clause 4, Evidence on every job, means we photograph and record what we actually find, not what we expect to find. You see the condition of your soil, your setbacks, your utility tie-ins. No surprises later.
3. Every Pro on Your Job Meets California’s Requirements
Under Haven Clause 3, Verified crews, every professional working under our name is required to hold the license and insurance California requires, with license numbers documented on your contract. We don’t send day laborers or unlicensed subs to handle your electrical or foundation work. In Garden Grove, where the city inspector knows the difference, that documentation matters.
4. We Know the Brands That Work in Orange County’s Climate
We’ve specified and installed Abodu and Cover units for homeowners who want a faster path to permit, and we’ve worked with James Hardie siding on custom builds where the marine layer off Huntington Beach demands rot-resistant materials. We don’t push one system. We match the product to your lot, your budget, and your timeline, and we explain the trade-offs in writing before you decide.
5. Your Price Is Fixed Before We Start
Haven Clause 1, Have it in writing, means you get a flat price, a written scope, and a written warranty before anyone sets foot on your property. No “while we’re in here” upsells. No scope creep when the city asks for a revised drainage plan. If we missed something in our site evaluation, that’s our cost, not yours. We’ve seen too many Garden Grove homeowners burned by low opening bids that doubled by framing. That doesn’t happen here.
6. We Guarantee What We Build
Every ADU we complete carries a written workmanship warranty, documented in your contract and backed by the Haven Standard. If something we installed fails because of how we installed it, we fix it. The warranty terms are specific, not vague promises, and they’re in your hands before construction begins. That’s Clause 1 again. It’s the foundation of how we work.
Our Promise to You

If you’re not satisfied with any aspect of our work, we have a clear path to resolve it. Call us during our business hours, Monday through Sunday, 7:30 AM to 7:30 PM, and a live coordinator will connect you with the local team. We commit to responding to concerns within one business day, not leaving you in voicemail purgatory.
Our pricing transparency means the written estimate you receive before signing is the price you pay for the scope described. If you change the scope, we’ll write a change order with a new fixed price. No hidden fees for permit expediting, no surprise charges when Garden Grove’s planning department asks for a minor revision. We pull all required permits and pass all inspections, with documentation provided to you at completion. Your final packet includes permit approvals, inspection sign-offs, photos of concealed work, and your warranty terms.
Before
AfterFrequently Asked Questions
Most ADU projects fail at the handoff between designer and builder. We eliminated that handoff. Ellery ADU Studio is a design-build studio, so the person who draws your plans is accountable for building them, and the builder can’t blame the designer for a detail that doesn’t work in the field. Since 2015, we’ve completed more than 900 ADUs with one contract, one price, and one team. Call (657) 567-6590 to schedule your free estimate and see the difference.
Contact us during our business hours and we’ll address your concern directly. Our workmanship warranty covers defects in installation, and Haven Clause 1 requires that the specific remedy be written in your contract before work starts. We don’t hide behind vague satisfaction language. If we made an error, we fix it. Call (657) 567-6590 to discuss any issue, or to get your free estimate if you’re still comparing options.
No. Your initial site evaluation and written estimate are free. We visit your property in Garden Grove or surrounding cities, assess your lot conditions, discuss your goals, and deliver a line-item written quote with a fixed price for the scope described. There’s no obligation to proceed. Call (657) 567-6590 to schedule yours.
Yes. Every professional working under our name is required to hold the California contractor license and insurance coverage that state law mandates for the work being performed. License numbers are documented on your contract for verification. We also pull all required city permits for your Garden Grove ADU and ensure inspections are passed. Call (657) 567-6590 to verify credentials or schedule your free estimate.
We schedule site evaluations during our regular business hours: Monday through Sunday, 7:30 AM to 7:30 PM. Most Garden Grove homeowners receive an appointment within a few days of calling. We’re not an emergency service, and ADUs aren’t built in a day, so we focus on thorough, unhurried evaluations that produce accurate quotes. Call (657) 567-6590 to book your free estimate, and we’ll find a time that works for your schedule.
Written by Nadia Ellery, Owner at Ellery ADU Studio Garden Grove, serving Garden Grove, Westminster, Fountain Valley, Cypress, Santa Ana, Buena Park, Huntington Beach, Fullerton, Orange, Costa Mesa, Cerritos, and Tustin since 2015.