Duplex ADU Models & Floor Plans
Explore Bark & Build's duplex ADUs — two independent units under one roof, ideal for investors, extended family, or maximizing rental income from a single build.
JRSPLC ★★★★★ 4.9 on Google · Read our reviewsFind the Perfect Duplex ADU for Your Property
Browse our fully permitted duplex ADU models — each designed for comfort, energy efficiency, and long-term value. Filter by bathroom or area to find the best fit for your home.
A Smarter Way to Add Value to Your Property
Accessory Dwelling Units are one of the highest-return home improvements available in San Mateo County. From dependable rental income to flexible living space and lasting equity, a well-built ADU works for your family and your finances for decades to come.
Earn Passive Income
Turn unused backyard space into dependable monthly rental income — a proven way to offset your mortgage in one of California's tightest housing markets.
Expand Your Living Space
Add hundreds of square feet of flexible living area — ideal for a home office, guest suite, or room for family to stay close.
Increase Property Value
A permitted, professionally built ADU is a lasting asset that can meaningfully raise your home's long-term resale value on the Peninsula.
Permit-Ready, Start to Finish
One licensed, in-house team handles design, engineering, permitting, and construction — built right and approved without the runaround.
Future-Proof Your Lifestyle
Build a space that adapts as life changes: a growing family today, multigenerational living tomorrow, and rental income whenever you need it.
Real Reviews From Real Bark & Build Clients
From single ADUs to income-generating duplexes, homeowners across San Mateo County trust Bark & Build to design, permit, and build it right. Here’s what they have to say about working with our team.