- Licensed Bonded & Insured
- | CSLB #1119464
ADU Construction
Palo Alto Based Serving the Bay Area
From concept to completion stunning ADUs that expand your home’s livability and long-term value.
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Quick answer
ADU construction in the Bay Area costs $95,000 to $250,000+ depending on type and scope. Most projects take 6 to 12 months from permit approval to final inspection. Barzel Builders handles design, permits, and full construction under one roof.
Palo Alto's Most Trusted ADU Builder
ADU construction is the process of building a self-contained secondary dwelling unit on an existing residential property, including attached, detached, and garage conversion types. In Palo Alto and the greater Bay Area, ADU construction typically costs between $95,000 and $250,000+ depending on size and scope, with timelines ranging from 6 to 12 months from permit approval to final inspection. At Barzel Builders (CSLB #1119464), we specialize in complete ADU construction throughout Palo Alto and the greater Bay Area, handling everything from design and permits to construction and final inspection.
With California’s ADU-friendly regulations and the Bay Area’s high rental demand, a professionally built ADU can generate significant passive income while adding long-term value to your property. Whether you want to house a family member, create a rental unit, or simply add livable square footage, our licensed ADU construction team delivers results you can count on.
What's Included in Our ADU Construction Services
Detached & Attached ADU Construction
We build both detached and attached ADUs from the ground up fully customized to your property and lifestyle.
Garage Conversion to ADU & Junior ADU
Transform your unused garage into a fully functional ADU or Junior ADU maximizing your lot without new construction.
Full Permit Handling & City Approvals
We manage every permit application, city approval, and inspection so you never have to deal with the paperwork yourself.
Custom ADU Design & Space Planning
Every ADU is designed around your goals whether for rental income, a guest suite, or multigenerational living.
Complete Interior Finishing & Fixture
From flooring and cabinetry to fixtures and lighting we handle every interior detail for a move-in ready space.
Why Choose Us for Your ADU Construction
01
Custom Design
Every ADU we build is uniquely designed to complement your existing home and maximize your lot's full potential.
02
Full Permit Handling
We manage every permit application, city approval, and inspection so you never have to deal with the paperwork yourself.
03
Honest Pricing
You receive a fully itemized ADU construction proposal before anything starts no hidden costs, no unexpected surprises.
04
Licensed Team
From framing and plumbing to electrical and finishing, our licensed crew handles every trade under one roof.
05
Rental Income
A professionally built ADU can generate $2,500 to $4,500 per month in rental income for your household.
06
On-Time Delivery
Most ADU construction projects are completed within 6 to 12 months we keep your project on schedule every step.
Ready to Build Your ADU ?
FAQ
Frequently asked questions
Quick answers to the most common questions about our remodeling and construction services.