Detached ADU Construction
A standalone backyard home, built from the ground up.
$250k – $450kText us about this
Sunnyvale · San Jose, CA
ADU Builders in Sunnyvale
Sunnyvale homeowners choose us for rental-ready ADUs near major employers, delivered turnkey and fully permitted. From design and permits through construction, one accountable team builds your ADU.
Free consultation · Licensed & insured · No obligation
- Licensed & InsuredCalifornia contractor
- Free ConsultationNo-obligation quote
- Design-BuildOne accountable team
- Workmanship WarrantyBacked in writing
What we build
ADU services in Sunnyvale
One accountable design-build team for every kind of accessory dwelling unit — from concept and permits through final finishes.
Attached ADU & Home Additions
Extra living space that flows from your existing home.
$200k – $400kText us about this
Garage Conversion ADU
Turn an underused garage into a legal living unit.
$120k – $220kText us about this
How it works
A clear design-build path
One team owns the whole project — so there's no finger-pointing between a designer, a permit expediter, and a builder.
- 01
Free Consultation & Feasibility
We visit your property, review your goals and budget, and confirm what your lot and San Jose zoning allow.
- 02
Design & Fixed Proposal
We design your ADU and return a clear, fixed-scope proposal — no surprise line items later.
- 03
Permitting
We prepare and submit the full permit package and manage the City of San Jose review from start to approval.
- 04
Build & Handover
One accountable design-build team constructs your ADU, passes final inspection, and hands you the keys.
Why homeowners choose us
ADU specialists for Sunnyvale and across Santa Clara County
An accessory dwelling unit is one of the biggest investments you'll make in your property. We focus on ADUs exclusively — so the design fits your lot, the permits get approved, and the build is done right the first time.
- ADUs are all we do — not a sideline for a general remodeler
- Fixed-scope proposals, so you know the price before we start
- We manage San Jose permits end to end
- Licensed, insured, and backed by a written workmanship warranty
Service area
Serving San Jose & Santa Clara County
We build ADUs throughout the City of San Jose and neighboring cities. Explore the areas we cover.
Areas We Serve
Willow GlenAlmaden ValleyCambrian ParkEvergreenBerryessaRose GardenNaglee ParkSanta TeresaBlossom ValleyWest San JoseSanta ClaraCampbellCupertinoLos GatosSaratogaSunnyvaleMilpitas
Serving San Jose and Santa Clara County. Don't see your area listed? Text us — we most likely cover it.
Built with trusted brands
Questions
Frequently asked
It depends on the type and size. Garage conversions typically run $120k–$220k, junior ADUs $90k–$160k, and new detached ADUs $250k–$450k. After a free consultation we give you a clear, fixed-scope proposal.
Most projects run 6–12 months end to end, including design and permitting. Garage conversions and modular units are usually faster; ground-up detached ADUs take longer.
Yes. We prepare the full permit package and manage the City of San Jose review from submittal to approval — you don't chase the city, we do.
California statewide standards generally allow detached ADUs up to 1,200 sq ft, and junior ADUs up to 500 sq ft. Your lot size and setbacks determine the specifics, which we confirm during feasibility.
Yes. ADUs and JADUs can be rented and are a popular way to add long-term income or house family. We design many units specifically for rental or multigenerational living.
Yes — we are a licensed and insured California design-build contractor specializing exclusively in ADUs, and every project is backed by a written workmanship warranty.