Why Riverside Homeowners Choose Ellery ADU Studio Riverside for ADU
Since 2015, Ellery ADU Studio has designed, permitted, and built more than 900 ADUs across California with a single rule: the price is written before anyone starts, and the record is documented when we leave. Our Riverside branch, led by Nadia Ellery, brings that standard to homeowners from El Sobrante to Eastvale. We are independently owned and operated, state-licensed, and insured. Call (951) 418-2910 to schedule your free written estimate.
6 Reasons We’re Riverside’s Top ADU Company
1. We Have Built ADUs Since California’s Law Changed
Ellery was founded in 2015, the same year California rewrote its ADU rules and the permitting queue became the real product. That timing matters. We learned the system while it was still forming, in cities that had never processed an ADU application before. Our Riverside team has worked through the specific requirements of Riverside County, Corona, Norco, and Rialto long enough to know which plan-check comments repeat, which inspectors prefer what detail, and how to keep a permit moving when it stalls. That is not something a general contractor picks up on the second job.
2. Our Reputation Is Built on Documentation, Not Claims
We do not ask you to trust us because we say we are trustworthy. Every ADU job leaves a documented record: photos of existing conditions, permit correspondence, inspection results, and the final punch list with sign-off. Homeowners in Glen Avon and Mira Loma can see what was promised and what was delivered. We encourage you to read our reviews, including the three-star ones. They tell you more about how we handle friction than the five-star reviews ever could.
3. Every Pro Working Under Our Name Holds Required License and Insurance
Under the Haven Standard, Clause 3, every crew member on your property is required to hold the license and insurance California requires for their trade. We do not self-certify. License numbers are on the permit application, which you receive in your documentation packet. The local business carries the policy; Haven contributes the verification system that proves it. That separation protects you.
4. We Design and Build Prefab and Site-Built ADUs From Leading Brands
We are certified to install Abodu, Cover, and Dvele units in Riverside County, and we design site-built ADUs with James Hardie siding when that fits the lot better. The point is not the brand. The point is that we match the product to your soil conditions, your setback, your utility capacity, and your budget. A homeowner in Sunnyslope with a tight backyard and a steep grade might need a Dvele unit on a stem wall. A family in Rubidoux with a flat lot and full utility access might do better with an Abodu and a faster permit. We have installed both, and we will tell you which one we would choose on your specific property.
5. Your Price Is Written Before We Start, and It Does Not Change
Clause 1 of the Haven Standard: Have it in writing. Your estimate is a flat price with a written scope, not a “starting at” number that balloons. We have seen ADU projects in Pedley and El Cerrito where the final invoice was 40% above the original bid because the designer and builder each blamed the other for a scope gap. Our design-build contract prevents that. One contract. One price. One party responsible. If we miss something in our site visit, that is our cost, not yours.
6. We Guarantee the Workmanship, and We Define What That Means
Our workmanship warranty covers defects in installation for the period stated in your contract. More importantly, it defines what happens if you are not satisfied. Clause 5 of the Haven Standard: No surprises. That includes no door upsell, no scope creep, and no “while we are in here” additions. If something is wrong, we document it, we schedule the fix, and we confirm it in writing. Nadia Ellery reviews every warranty request personally.
Our Promise to You
If you are not satisfied with any aspect of our work, we will return and correct it at no charge. That is not a slogan. It is Clause 5, backed by the documentation we provide on every job. We answer calls Monday through Sunday, 7:00 AM to 7:30 PM, and we schedule appointments within that window with a named technician and a text when they are on the way. Your estimate is free, written, and itemized. Your price is fixed. Your permits are pulled and inspections are passed before we consider the job complete. We do not collect final payment until you sign the punch list. That is the Haven Standard, and it is how we have worked since 2015.
Frequently Asked Questions
Most ADU projects fail at the handoff between designer and builder. We are a design-build studio, so the drawings, the permit set, and the construction are one contract with one price. Since 2015, we have completed over 900 ADUs with that model. Our Riverside team knows the local soils, the local inspectors, and the specific setback rules in neighborhoods from Glen Avon to Eastvale. Call (951) 418-2910 for a free written estimate and compare our documentation to what others provide.
We return and correct it at no additional charge. Our workmanship warranty is written in your contract, and Nadia Ellery reviews every warranty request personally. We also document every job with photos and inspection records, so there is no dispute about what was promised. If you have concerns, call (951) 418-2910 and we will schedule a site review.
No. Your written estimate is free. It includes a site visit, a preliminary design, a permit timeline, and a flat price. We do not charge for that work because we want you to compare apples to apples. Call (951) 418-2910 to schedule yours.
Yes. Every pro working under our name is required to hold the license and insurance California requires for their trade. License numbers appear on your permit application and in your documentation packet. We are state-licensed and insured, and we pull all required permits for your jurisdiction, whether that is the city of Riverside, Corona, Norco, or unincorporated Riverside County. Call (951) 418-2910 to verify our standing.
We schedule site visits during our operating hours: Monday through Sunday, 7:00 AM to 7:30 PM. We do not promise same-day arrival, but we do promise a real appointment window, a named technician, and a text when they are on the way. Most Riverside-area homeowners from Rubidoux to Mira Loma receive their written estimate within a few business days of the site visit. Call (951) 418-2910 to book your slot.
Written by Nadia Ellery, Owner at Ellery ADU Studio Riverside, serving Riverside, Rubidoux, Pedley, El Sobrante, Sunnyslope, Glen Avon, Mira Loma, Norco, El Cerrito, Eastvale, Corona, and Rialto.