Browse 60 ADU builders and contractors by services, location, ratings, and available documentation. Use the directory as a starting point, then confirm qualifications, license status, scope, and references directly with each business.
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Highly recommended on Reddit. Known for quality craftsmanship. Featured 670sf casita at $196K.
Offers ADU financing and incentives guidance.
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Known for streamlined process and fast timelines.
Helps homeowners plan ADUs and matches them with builders.
Online marketplace connecting homeowners with prefab ADU manufacturers.
Uses technology to streamline the ADU process.
High-quality prefab ADUs with fast installation.
Uses 3D printing technology for faster, more sustainable construction.
Architect-designed ADUs with a focus on quality and design.
Specializes in sustainable, energy-efficient ADU construction.
Consulting-focused company that helps homeowners navigate the ADU process.
Veteran-owned design-build ADU contractor. CSLB #1094366. 1-year labor warranty, 10-year structural warranty. Serves Sacramento and Placer County. Email: andrew@a1buildingcontractors.com
ADU-focused contractor based in North Highlands. Advertises ADUs starting at $180K with typical rental income of $2,200/month. 12 ADU permits in city records.
Focused on affordable housing solutions.
Listings combine public business information, owner-submitted details, and available third-party sources. “Documented records” may reflect either municipal permit records or BuildZoom project totals, so they are presented as source-specific context rather than a quality score.
Documented project and permit counts are directional proxies from mixed sources. They are not apples-to-apples and are not a quality ranking. Read the methodology.