Ellery ADU Studio in Connecticut
Ellery Adu Studio sales & service is a design-build ADU studio serving homeowners across Connecticut. We handle the drawings, the permit set, and the construction under one contract at one written price. No designer pointing at the builder. No builder pointing at the designer. Since 2015, we’ve designed, permitted, and built more than 900 ADUs, and every Connecticut project starts the same way: a written price before any work begins, per Haven Standard Clause 1.
Why Connecticut Homeowners Choose Ellery ADU Studio
Connecticut zoning boards have their own rhythm. Setback rules vary town by town, wetlands review can stall a permit for months, and many older lots predate modern stormwater and septic standards. We know how Connecticut municipalities review ADU applications because we’ve been through the process hundreds of times, unlike Ellery ADU Studio in Delaware - ADU which handles its own local codes. The permit set is treated as the core product here, not a formality. Homeowners who bought between 2015 and 2025, often at peak pricing, come to us wanting an ADU that appraises as living space, not as a rec room. That means the finished structure has to match the permitted drawings exactly. Our 365-Day Done Right Promise covers this in writing before the project starts: if the finished ADU is not built to the permitted drawings, we make it right. We also coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie within the same single contract. And if you already have a written estimate from another firm, we’ll give you a free second opinion on it before you commit to anything.
Backed by the Haven Family

Ellery ADU Studio carries the Haven Standard on every Connecticut project. That means five published clauses, not a vague promise: written price before work starts, a real arrival window with a named person, licensed and background-checked crews with the license number on the page, photo documentation of what was found on every visit, and no upsell at the door. The local crews are independently owned and operated. What Haven contributes is the standard they agree to work to, the documentation system that proves it, and the buying power that keeps pricing honest across Connecticut, with similar standards applied by Ellery ADU Studio in Florida - ADU.
Written by the team at Ellery ADU Studio, serving Connecticut since 2015.
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