ADU Builder in Sunnyvale
Sunnyvale's dense single-family neighborhoods and strong tech-worker rental market make ADUs a popular addition, and it borders Cupertino directly.
From Ortega Park to Cherry Chase and the streets around Moffett Park, Sunnyvale homeowners have embraced ADUs as both extra living space and rental income, driven by strong demand from nearby tech employers. As the Cupertino-based team right next door, we build detached backyard homes, garage conversions, and JADUs across Sunnyvale, working within the city's standard suburban lot sizes to fit a well-designed unit without crowding the main house.
Local Landmarks We Serve Near
Services Available in Sunnyvale
Detached ADU / Backyard Home Construction
From $180,000
Garage Conversion ADU
From $95,000
Junior ADU (JADU) Conversion
From $65,000
Attached ADU Home Addition
From $150,000
Prefab / Modular ADU Installation
From $120,000
ADU Design & Architectural Plans
From $8,500
ADU Permitting & Cupertino Approvals
From $4,500
ADU Foundation & Site Work
From $25,000
ADU Interior Finishing & Final Build-out
From $35,000
How Our ADU Design-Build Process Works
Get your Cupertino ADU designed, permitted, and built in 3 straightforward phases
Request a Free Estimate
Text us or fill out the contact form. Describe your lot and goals and receive a free, no-obligation consultation.
Text us for a quoteWe Clean Your Property
Our professional team arrives on time with commercial-grade equipment. We treat every property with care.
Enjoy the Results
Walk through the results with us. We guarantee your satisfaction. Pay only after you approve the work.
Licensed & Insured
Full coverage protection
Satisfaction Guaranteed
100% money-back guarantee
Eco-Friendly
Safe cleaning solutions
Free Estimates
No obligation quotes
Recent ADU Builds in Cupertino
A look at real projects from our Cupertino crew — detached backyard homes, garage conversions, and interior finish work across Santa Clara County.
Service Areas
ADU design-build across Cupertino and 10 Santa Clara County communities
ADU Construction Service Area
Real, professional ADU design-build across Cupertino and every neighboring Santa Clara County city — real municipal boundaries, not a schematic.
Cities We Serve
Don't see your city listed? We likely still cover it — reach out and ask.
Frequently Asked Questions
Have a question we didn't answer? Text us and we'll get right back to you.
How much does it cost to build an ADU in Cupertino?
A detached ADU in Cupertino typically runs $180,000 to $400,000+ depending on size and finish level. Garage conversions and JADUs cost less, usually starting around $65,000 to $95,000. We give a firm, itemized quote after a site visit — text us for a free consultation.
How long does ADU permitting take in Cupertino?
California law requires cities to approve or deny complete ADU applications within 60 days. In practice, well-prepared applications in Cupertino typically move through in 2 to 4 months including plan-check correction rounds. We prepare and manage the full permit package.
What types of ADUs do you build?
We build detached backyard ADUs, garage conversion ADUs, Junior ADUs (JADUs), attached ADU additions, and prefab/modular ADU installations, plus offer standalone architectural design and permitting services.
Can I rent out my ADU?
Yes. Under California and Cupertino ADU rules a completed ADU can generally be rented long-term. Short-term rental rules vary by city — we can walk you through the current local restrictions for your property.
What areas around Cupertino do you serve?
We serve Cupertino and the wider Santa Clara County / Silicon Valley including Sunnyvale, Saratoga, San Jose, Santa Clara, Mountain View, Los Altos, Campbell, Los Gatos, and Monte Sereno.
Do you handle design, permitting, and construction all in one contract?
Yes. We work as your general contractor for the full design-build process — architectural plans, structural engineering, City of Cupertino permitting, and construction through final inspection — one team, one point of contact.
Get Your Free Estimate
Ready to build your ADU? Contact us today for a free, no-obligation consultation. We respond to all inquiries within 1 hour.