Ellery ADU Studio in Montana

Ellery ADU Studio in Montana

Ellery ADU Studio is a design-build studio, not a contractor. We handle the drawings, the permit set, and the construction under one contract at one written price, and we do that across Montana through Ellery Adu Studio sales & service. Since 2015, we’ve designed, permitted, and built 900+ ADUs, every one with a written price before work started and a documented photo record when work was complete. Montana homeowners get that same deal today: no designer-versus-builder blame gap, no open-ended estimate, and no guessing what happens next.

Why Montana Homeowners Choose Ellery ADU Studio

Most ADU projects stall because the designer and the builder point at each other when something goes sideways. That is precisely why we exist. Ellery ADU Studio was founded in 2015, the year California’s ADU permitting shifted, when it became obvious that the permit set would decide whether a project actually got built. We treat the permit set as the core product, not an afterthought. In Montana, where frost depth, snow load, and local code review shape every foundation and roofline, that documentation matters even more. Our scope covers ADU design and permitting, garage conversions, new detached ADUs, junior ADUs and interior conversions, and site prep and utilities, with Ellery ADU Studio in Nebraska - ADU projects following the same model. We also specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, Mighty Buildings, Boxabl, Plant Prefab, Tuff Shed, and James Hardie within the same single contract. That means when a homeowner asks who is responsible for the foundation, the trusses, or the electrical rough-in, the answer is never ambiguous. It is us. Every project carries a written price before any work begins, per Haven Standard Clause 1. We also offer a free second opinion on any written estimate you already have in hand. If it is not built to the permitted drawings, we make it right under our 365-Day Done Right Promise, in writing, before the project starts.

Backed by the Haven Family

Ellery ADU Studio operates under the Haven Standard, five published clauses that govern every job we do in Montana. The price is in writing before work starts. You get a real arrival window with a named person. Our crews are licensed, insured, and background-checked, and the license number appears on every page. You receive photographic documentation of what was found and what was done. And there is no upsell at the door. A live person answers our phones 24/7, no voicemail queue. The words “call for a quote” do not appear anywhere in our process, because the price is always quoted and agreed before any work begins.

Written by the team at Ellery ADU Studio, a Haven company serving Montana homeowners since 2015.