Backyard ADUs

Backyard ADUs is a Brunswick, Maine design-build firm founded in 2019, focused on net-zero-ready small homes and accessory dwelling units. The company builds in backyards, on standalone parcels, and attached to existing homes, blending modern prefab panel construction with precision on-site assembly.

Their S-Line, L-Line, and Damona designs range from 525 to 1,000 sq ft — intentionally oversized relative to traditional THOW standards to maximize livability while staying below most local ADU size thresholds. A $5,000 design retainer starts the process; builds typically follow a fixed-price contract.

As of May 2026, Backyard ADUs holds a showroom at 247 Coombs Rd, Brunswick, ME 04011 that functions as a live-in demonstration home. The company operates throughout Maine and Massachusetts.