Floor Plan Overview
The D2 is a two-unit duplex ADU designed to maximize rentable space and privacy — two self-contained homes under one roof, each with its own entrance, kitchen, and living area. A smart layout for dual rental income or keeping family close.
Two Units, Twice the Return
A duplex ADU turns one backyard build into two income-producing homes — one of the highest-return additions a San Mateo County property owner can make.
Double the Rental Income
Two independent units mean two rent checks from a single build — substantially more monthly cash flow than a standard single-unit ADU.
Stronger Long-Term ROI
Spreading construction cost across two rentable units improves your return and shortens the payback period on your investment.
House-Hack Your Mortgage
Live in one unit and rent the other — or rent both — to offset much of your mortgage in one of California's highest-rent markets.
Built-In Property Value
A permitted, income-generating duplex adds lasting resale value and appeals to investors and multigenerational buyers alike.
Homeowners Love Building With Bark & Build
Hundreds of ADU and remodel projects delivered across San Mateo County and the Peninsula. See what real homeowners say about building with our team.