Ellery ADU Studio in Illinois
Ellery ADU Studio is the Haven family’s design-build studio for accessory dwelling units across Illinois. We handle the drawings, the permit set, and the construction as one contract at one written price, which removes the designer-versus-builder blame gap that derails so many ADU projects. Illinois homeowners get the full Ellery model, also available through Ellery ADU Studio in Indiana - ADU and other Midwest locations: 900+ ADUs designed, permitted, and built since 2015, a documented photo record on every visit, and the Haven Standard written into every agreement before any work begins.
Why Illinois Homeowners Choose Ellery ADU Studio
Most ADU projects in Illinois don’t fall apart because of bad carpentry. They fall apart because the designer blames the builder, the builder blames the drawings, and the homeowner is stuck holding a half-finished structure and two invoices. Ellery was built to close that gap. Since 2015, we’ve designed, permitted, and built more than 900 ADUs, every one of them under a single contract with a written price agreed before work started. That’s Haven Standard Clause 1, and it’s not a slogan. When we quote an ADU in Illinois-or through Ellery ADU Studio in Iowa - ADU-the price is on paper before anyone picks up a hammer. We also put our 365-Day Done Right Promise in writing before the project starts: if the finished ADU is not built to the permitted drawings, we make it right. No arbitration, no finger-pointing. 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, so Illinois homeowners who want a faster build get one without splitting responsibility across vendors. Every crew member is background-checked and uniformed, and our license number appears on every page of this site, verified, not just claimed. If you already have a written estimate from another ADU builder, bring it to us. We’ll give you a free second opinion on it, line by line.
Backed by the Haven Family
our Ellery Adu Studio services are independently owned and operated, and every ADU project in Illinois carries the Haven Standard: five clauses, published, that govern the entire job. The price in writing before work starts, a real arrival window with a named technician, licensed and insured crews with the license number published, photographic evidence of what was found and what was done on every visit, and no upsell at the door. A haven is somewhere nothing bad is going to happen to you. That’s the condition we’re selling.
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