Ellery ADU Studio in Hawaii

Ellery ADU Studio in Hawaii

Ellery ADU Studio designs, permits, and builds accessory dwelling units across Hawaii under a single contract and a single written price. No designer blaming the builder, no builder pointing at the drawings: one company, one contract, one number on the page before anyone picks up a hammer. Since 2015, our Ellery Adu Studio services have delivered more than 900 ADUs this way, and every one of them came with a written price before work started and a documented photo record when the work was complete. Homeowners across Hawaii get the full Haven Standard on every project, from a detached backyard unit to a garage conversion.

Why Hawaii Homeowners Choose Ellery ADU Studio

The typical ADU project in Hawaii stalls at the same moment: the drawings say one thing, the builder builds another, and the owner is left holding invoices from two parties who each say the other one is responsible. Our design-build model removes that gap. The permit set, the drawings, the construction, and the final walkthrough sit inside one contract, so there is no one to point at but us. We quote a written price before any work begins, always, per Haven Standard Clause 1, and that price is agreed before the first permit page is drawn. Clients also receive a Free Second Opinion on any written estimate they already have in hand, which matters in Hawaii where building costs swing between islands and a second read on scope is often the difference between a real number and a hopeful one. For those considering projects on the mainland, we also operate as Ellery ADU Studio in Idaho - ADU specialists. We specify and coordinate prefabricated systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie within the same single contract, and our crews are background-checked and uniformed, with the license number published on every page. Every visit includes a Documented Photo Record: you see what we found and what we did, not a summary of how it felt.

Backed by the Haven Family

Ellery ADU Studio operates under the Haven Standard, five published clauses that govern every job across Hawaii: the price in writing before work starts, a real arrival window with a named person, verified crews with published credentials, photographic evidence on every visit, and no upsell at the door. Our 365-Day Done Right Promise states in writing, before the project begins, that if the finished ADU is not built to the permitted drawings, we make it right. Haven does not pretend to be from any one island. The local studio carries the license and the trucks and the neighbors. What Haven contributes is the standard they agree to work to, the documentation system that proves it, and the buying power that keeps the price honest.

Written by the team at Ellery ADU Studio, serving Hawaii since 2015.