Ellery ADU Studio in California

Ellery ADU Studio in California

Ellery ADU Studio has designed, permitted, and built more than 900 accessory dwelling units across California since 2015, the year the state’s ADU permitting rules finally opened up. We operate as a single design-build contract: the drawings, the permit set, and the construction are one written price, handled by one team. No designer pointing at the builder, no builder pointing at the designer. Homeowners seeking Ellery Adu Studio sales & service in California get one accountable partner from first sketch to final inspection, backed by the Haven Standard.

Why California Homeowners Choose Ellery ADU Studio

The reason most ADU projects stall is not money and not the city. It’s the gap between what the designer drew and what the builder actually built, with the homeowner standing in the middle holding two contracts and no clear answer. Ellery was founded specifically to close that gap. Since 2015, we have put more than 900 ADUs through design, permitting, and construction under a single agreement with a written price before any work starts, a process now also available through Ellery ADU Studio in Colorado - ADU projects. That price is documented per Haven Standard Clause 1, and it includes the permit set, not as an afterthought but as the core deliverable. Homeowners who have already collected an estimate from another builder can bring it to us for a free second opinion, and we will tell you plainly whether the scope and the numbers line up. On every project we also produce a documented photo record of what was found and what was done, so you are never relying on a summary of how the visit felt. Our crews are background-checked, uniformed, and their license number appears on every page, verified rather than claimed. If your finished ADU is not built to the permitted drawings, our 365-Day Done Right Promise puts the fix in writing before the project starts. We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie within that same single contract, which matters when your site, your soil, or your city’s building department makes a panelized build the smarter route.

Backed by the Haven Family

Haven was formed in 1998 to buy small home-service companies that already did the work properly and keep them that way. The condition of carrying the Haven name is agreeing to five published clauses: written price before work starts, a real arrival window with a named technician, licensed and background-checked crews, photographic evidence on every visit, and no upsell at the door. Every Ellery ADU Studio project across California is held to all five, as are Ellery ADU Studio in Connecticut - ADU builds.

Written by the team at Ellery ADU Studio, designing and building ADUs across California since 2015 under the Haven Standard.