ADU Contractor in Santa Clara, San Jose
Detached ADUs and garage conversions for Santa Clara's suburban tech-corridor homes.
ADU Contractor San Jose·1600 Component Dr, San Jose, CA 95131
Serving the City of Santa Clara & the neighborhoods around Santa Clara University.
Licensed & Insured
Full liability & workers' comp coverage
Free Consultation
No-obligation on-site estimates
Design & Permitting
San Jose Municipal Code 20.30.150 compliant
Full-Service Build
Design, permits & construction, start to finish
Our ADU Services in San Jose
Full-service ADU design, permitting, and construction for homeowners across San Jose and Santa Clara County.
Detached ADU Construction
New backyard ADU / granny flat construction, up to approximately 1,200 sq ft, built to San Jose ADU standards
Garage Conversion ADU
Convert an existing garage into a fully permitted living unit — ministerial approval, typical ~60-day review
Attached ADU
An addition attached to your main home, designed to match the existing structure and roofline
Junior ADU (JADU)
Up to 500 sq ft within the existing footprint of your home — an efficient, lower-cost path to added living space
ADU Design & Permitting
Architectural plans, San Jose Municipal Code 20.30.150 compliance, pre-approved ADU plans program, and full permit handling
Granny Flat / In-Law Suite
Multigenerational living units designed for comfort, privacy, and long-term flexibility
Not sure which ADU type fits your lot? Text us for a free consultation.
How It Works
From first idea to a finished, permitted ADU — our simple four-step process.
Reach Out
Text us for a free, no-obligation consultation. Tell us about your property, your goals, and your budget.
Design & Permitting
We visit your property, assess the lot, and design an ADU plan that fits your site and San Jose Municipal Code 20.30.150. We handle plan submittal and permit approval.
Construction
Our experienced crew handles the build — foundation, framing, utilities, and finishes — cleanly and on schedule, keeping you updated at every stage.
Move In
Final inspection, walkthrough, and handoff — your new ADU, JADU, or in-law suite is ready for family or tenants.
ADU Investment Guide
Every project is different — these are typical San Jose ranges to help you plan. Your exact price comes with a free, itemized estimate.
Junior ADU (JADU)
Within your home's existing footprint
From $60,000
- Free on-site consultation
- Up to 500 sq ft, built within your home
- Design & San Jose permit handling
- Efficient kitchenette & living area layout
- Typically the fastest ADU path
Garage Conversion ADU
Most popular — fast ministerial approval
$80,000 – $150,000
- Custom design plan for your garage
- San Jose Municipal Code 20.30.150 compliance
- Ministerial approval, ~60-day review
- Full utility & finish upgrade
- Project management start to finish
Detached / Attached ADU
New backyard unit or home addition
$150,000 – $400,000
- Custom architectural design
- Up to ~1,200 sq ft detached ADUs
- Attached additions matched to your home
- Full permitting & construction management
- Granny flat / in-law suite layouts available
Prices vary with size, site conditions, utility connections, and finish level. Design and permitting fees are typically $1,000–$5,000 on top of construction. Contact us for an exact quote — consultations are always free.
Recent ADU Projects in San Jose
A look at real ADU project types from our San Jose team.
Santa Clara & Every Area We Cover
ADU Contractor San Jose serves Santa Clara and every city and neighborhood across San Jose & Santa Clara County. Explore the interactive map or pick your area below.
Areas We Serve
Serving San Jose and Santa Clara County. Don't see your area listed? Text us — we most likely cover it.
Where to Find Us
ADU Contractor San Jose · 1600 Component Dr, San Jose, CA 95131 — serving Santa Clara
ADU Construction in Santa Clara, San Jose
Santa Clara sits at the heart of the South Bay tech corridor, and its residential streets — from the neighborhoods around Santa Clara University to the tracts near San Tomas Expressway — are largely single-family homes on solid suburban lots with attached garages. The city has its own ADU ordinance aligned with state law, and homeowners here have been steady adopters of both garage-conversion and detached-backyard ADU projects, often for rental income given the area's strong tenant demand.
We handle Santa Clara ADU projects end to end — site evaluation, design, permitting through the City of Santa Clara's building division, and construction. Whether you're converting a garage near the university or building new in a larger backyard near San Tomas, we design to fit your specific lot. Text us for a free consultation.
Frequently Asked Questions
Everything you need to know about building an ADU in San Jose.
Costs vary widely with size and scope. A garage conversion ADU typically runs $80,000–$150,000, an attached ADU addition $150,000–$300,000, and a new detached ADU $250,000–$400,000. Design and permitting fees are typically $1,000–$5,000 on top of construction. We give you a clear, itemized estimate after a free on-site consultation — text us to get started.
Get Your Free Consultation
Ready to add an ADU, garage conversion, or in-law suite? Text us for a free, no-obligation consultation and estimate anywhere in San Jose & Santa Clara County.
Licensed
& Insured
Free
Consultations