About ADU Build Hub

ADU Build Hub is an independent directory of the companies that design and build accessory dwelling units and prefab homes in the United States: prefab ADU manufacturers, backyard-office builders, modular home companies, and custom ADU contractors. We group them by how they build and rank them by real signals rather than who pays, and we write every summary ourselves after checking the company against its own site.

Listings are added over time, and a builder can ask to be included; we verify it first. This is a guide to help you compare, not construction or legal advice, and ADU rules vary by state and city, so confirm what your jurisdiction allows before you commit.