ADU Construction & Garage Conversions
Add living space and rental income with a custom ADU. DTI Construction designs and builds detached ADUs, garage conversions, and in-law suites across San Jose and the Bay Area — handling design, permits, and construction from start to finish.
Accessory Dwelling Units, Built Start to Finish
An ADU is one of the smartest investments a Bay Area homeowner can make — rental income, multigenerational living, or a home office, all on land you already own. DTI Construction builds detached ADUs, attached units, and garage conversions that meet California and local ADU codes and actually feel like a real home.
We guide you through the entire process: feasibility and design, city permits and utility connections, foundation and framing, and full interior finish-out with kitchen and bath. As a licensed general contractor, we keep the project coordinated and on schedule so you can start earning or enjoying the space sooner.
Why Homeowners Trust DTI for ADU Construction
20+ Years of Experience
Two decades remodeling homes and commercial spaces across San Jose and the greater Bay Area. Seasoned crews who've solved every problem an older Silicon Valley home can hide.
Licensed & Insured
A fully licensed, bonded, and insured California general contractor. We pull the proper permits and build to code — protecting your home and your investment.
On-Time, On-Budget
Honest estimates and realistic timelines you can plan around. We respect your schedule and your budget, and we deliver what we promise.
Clear Communication
One dedicated point of contact from first walkthrough to final punch list. You always know what's happening, what's next, and why — no guesswork.
What Our ADU Construction Includes
From detached new-builds to garage conversions, we handle every phase of your ADU — design, permits, construction, and finishes.
Detached ADUs
Freestanding backyard units with full kitchen and bath — private space or steady rental income.
Garage Conversions
Turn an underused garage into a legal, comfortable living unit at a lower cost per square foot.
Attached ADUs & In-Law Suites
Additions connected to your home for multigenerational living or guests.
Junior ADUs (JADUs)
Compact units within your existing footprint that meet JADU requirements.
Permits & Utilities
We manage city ADU permits, utility connections, and inspections from start to finish.
Full Kitchen & Bath Finish
Complete, move-in-ready interiors with kitchen, bathroom, and durable finishes.
Built Right, Built to Last
From Idea to Completion
A clear five-step process that keeps your project organized, on schedule, and on budget.
Consultation
We listen to your goals, budget, and timeline — honest advice, no pressure.
Free Estimate
A detailed, transparent written estimate so you know exactly what to expect.
Design & Planning
Plans, selections, and permits handled so the build starts on solid ground.
Construction
Skilled, licensed crews build to code with clean, respectful job sites.
Final Walkthrough
We walk every detail with you and don't finish until you're thrilled.
Our Work Across San Jose
Why Homeowners Trust DTI
ADUs live or die on permitting and coordination, and that's where DTI shines. San Jose homeowners trust us to navigate California's ADU rules, handle the city and utilities, and build a unit that's fully legal, well-crafted, and ready to earn income or house family.
Frequently Asked Questions
An Accessory Dwelling Unit is a secondary living unit on your property — detached, attached, or a garage conversion — with its own kitchen, bathroom, and entrance. It's ideal for rental income or multigenerational living.
What Our Clients Say
See why Bay Area homeowners trust DTI Construction Inc.
DTI remodeled our kitchen and two bathrooms. Manny and his crew were professional, punctual, and incredibly skilled. Finished on time and the quality is outstanding. Highly recommend.
From the first estimate to the final walkthrough, communication was clear and honest. No surprises, no hidden costs. Our new primary bath looks like a luxury spa. Reliable and trustworthy.
We hired DTI for a full home remodel and they exceeded every expectation. Meticulous craftsmanship, respectful crew, and a job site that was clean every single day. True professionals.
Manny built our detached ADU and handled all the permits. He kept us informed the whole way and delivered on budget. The unit is beautiful and already rented. Couldn't be happier.
Honest estimate, skilled work, and they finished when they said they would. DTI opened up our kitchen and living area and it completely transformed the house. Excellent contractor.
DTI remodeled our kitchen and two bathrooms. Manny and his crew were professional, punctual, and incredibly skilled. Finished on time and the quality is outstanding. Highly recommend.
From the first estimate to the final walkthrough, communication was clear and honest. No surprises, no hidden costs. Our new primary bath looks like a luxury spa. Reliable and trustworthy.
We hired DTI for a full home remodel and they exceeded every expectation. Meticulous craftsmanship, respectful crew, and a job site that was clean every single day. True professionals.
Manny built our detached ADU and handled all the permits. He kept us informed the whole way and delivered on budget. The unit is beautiful and already rented. Couldn't be happier.
Honest estimate, skilled work, and they finished when they said they would. DTI opened up our kitchen and living area and it completely transformed the house. Excellent contractor.
We added a bedroom and expanded our kitchen. DTI matched the new construction perfectly to the existing home — you'd never know it was an addition. Professional and dependable throughout.
Great experience start to finish. The team was courteous, the pricing was fair, and the workmanship is top-notch. They treated our home like their own. Would absolutely use them again.
DTI handled our second-story addition and the results are stunning. Manny managed every detail and every subcontractor flawlessly. On time, on budget, and beautifully built.
Our master bath remodel is flawless — the tile work and glass shower are perfect. DTI is skilled, clean, and communicative. Best contractor experience we've had in the Bay Area.
Reliable, professional, and genuinely honest. They finished our basement into a guest suite and the whole process was smooth and stress-free. Quality craftsmanship you can count on.
We added a bedroom and expanded our kitchen. DTI matched the new construction perfectly to the existing home — you'd never know it was an addition. Professional and dependable throughout.
Great experience start to finish. The team was courteous, the pricing was fair, and the workmanship is top-notch. They treated our home like their own. Would absolutely use them again.
DTI handled our second-story addition and the results are stunning. Manny managed every detail and every subcontractor flawlessly. On time, on budget, and beautifully built.
Our master bath remodel is flawless — the tile work and glass shower are perfect. DTI is skilled, clean, and communicative. Best contractor experience we've had in the Bay Area.
Reliable, professional, and genuinely honest. They finished our basement into a guest suite and the whole process was smooth and stress-free. Quality craftsmanship you can count on.
From Idea to Completion — Let's Build It Together
Build Your ADU With DTI
Contact DTI Construction Inc. today for your free consultation and honest written estimate.
Start Your Home Transformation With Experts Today
Tell us about your project and we'll get back to you within 24 hours with honest advice and a written estimate.
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