ADU Construction in San Jose
- Home
- ADUs Construction
- San Jose
- Transform your unused garage into income.
- Design a detached backyard retreat for San Jose.
- Create an attached family extension with privacy.
- Convert your basement into a bright apartment.
- Build a compact home office for focus.
- Trust our team for full-service ADU construction.
Why the Bay Area Chooses Gadi Construction
Our home remodeling project is finally complete (almost 2 year ordeal), but team at Gadi Construction made this navigation manageable.
First shout out to Millie Studnict(Project Manager) . If you've ever gone through a major home renovation, you'd have many questions, decisions, surprises, inspections, and frustration. Throughout the entire process, Millie was always there with an answer, a solution, or simply the patience to walk us through the next step.
What I appreciated most was that Millie genuinely cared. No matter how busy things got, she always returned calls, responded to emails, and kept us informed. There were plenty of times when we were unsure about something, and Millie never made us feel like we were asking too many questions.
The entire Gadi team was great to work with as well. The crews showed up when they said they would, treated our home with respect, and were always courteous and professional. It was clear that everyone took pride in their work.
After dealing with the stress of restoring our home following a fire, it was a huge relief to have a contractor we could trust. The project is now complete, the final inspection has passed, and we're very happy with the outcome.
Thank you, Millie and Lucie and everyone at Gadi Construction..
Our home remodeling project is finally complete (almost 2 year ordeal), but team at Gadi Construction made this navigation manageable.<br><br>First shout out to Millie Studnict(Project Manager) . If you've ever gone through a major home renovation, you'd have many questions, decisions, surprises, inspections, and frustration. Throughout the entire process, Millie was always there with an answer, a solution, or simply the patience to walk us through the next step.<br><br>What I appreciated most was that Millie genuinely cared. No matter how busy things got, she always returned calls, responded to emails, and kept us informed. There were plenty of times when we were unsure about something, and Millie never made us feel like we were asking too many questions.<br><br>The entire Gadi team was great to work with as well. The crews showed up when they said they would, treated our home with respect, and were always courteous and professional. It was clear that everyone took pride in their work.<br><br>After dealing with the stress of restoring our home following a fire, it was a huge relief to have a contractor we could trust. The project is now complete, the final inspection has passed, and we're very happy with the outcome.<br><br>Thank you, Millie, and thank you to everyone at Gadi Construction for helping us get our home back.
Our home remodeling project is finally complete (almost 2 year ordeal), but team at Gadi Construction made this navigation manageable.
First shout out to Millie Studnict(Project Manager) . If you've ever gone through a major home renovation, you'd have many questions, decisions, surprises, inspections, and frustration. Throughout the entire process, Millie was always there with an answer, a solution, or simply the patience to walk us through the next step.
What I appreciated most was that Millie genuinely cared. No matter how busy things got, she always returned calls, responded to emails, and kept us informed. There were plenty of times when we were unsure about something, and Millie never made us feel like we were asking too many questions.
The entire Gadi team was great to work with as well. The crews showed up when they said they would, treated our home with respect, and were always courteous and professional. It was clear that everyone took pride in their work.
After dealing with the stress of restoring our home following a fire, it was a huge relief to have a contractor we could trust. The project is now complete, the final inspection has passed, and we're very happy with the outcome.
Thank you, Millie, and thank you to everyone at Gadi Construction for helping us get our home back.
I just wrapped a primary bathroom remodel with GADI.
Effie was a fantastic design partner – he understood our initial vision and worked with it to come up with something even better that we love.
Nadav did an amazing job managing the project. Communication throughout was constant & immediate via text, and we got the project done quickly and with minimal fuss. His team on the ground was also great across the board.
I'm hoping to work with Nadav & Effie on another project soon, and I highly recommend GADI!
I just wrapped a primary bathroom remodel with GADI.<br><br>Effie was a fantastic design partner – he understood our initial vision and worked with it to come up with something even better that we love.<br><br>Nadav did an amazing job managing the project. Communication throughout was constant & immediate via text, and we got the project done quickly and with minimal fuss. His team on the ground was also great across the board.<br><br>I'm hoping to work with Nadav & Effie on another project soon, and I highly recommend GADI!
I requested a quote for a job I need done and I had the pleasure of meeting Itay today. He was very professional and kind. Had good energy and reassured me that he will do everything he can for the best outcome. This is more of a review on Itay and I will update if I decide to hire them. But the initial process of getting a quote done was great because of Itay.
I recently hadflood damage to my home which requires extensive remodeling. I called a number of contractors And I was most impressed with Millie from Gadi construction.
Though we haven't gotten to the point of actual construction yet , Millie has come out and given me excellent guidance for remodeling bathrooms, kitchen, living area. I've never done remodeling before so it was nice to have somebody like Millie to
' hold my hand,' and take some of the stress off of making some major decisions. She has since returned phone calls promptly and feels more like a friend helping me rather than a person I hired or may hire.
Whether we use you or not in the end thank you Millie for helping me during this difficult time and I hope others see this review and can take advantage of your nice , kind personality and expertise.
Great experience with Gadi on my bathroom remodel. He hired experienced sub-contractors and made sure they showed up on time. Pricing is fair for the work done.
GADI had helped me in demolishing a big mirror wall and remodeling it into a dinning room. I couldn't be happier with the result. Esther and her crew were just amazing and made my dream came true. Great job!
In a city known for innovation and growth, from the iconic San Jose City Hall to the bustling SAP Center and the historic Winchester Mystery House, your home should evolve too. Accessory Dwelling Units (ADUs) offer San Jose homeowners a modern way to expand living space, generate rental income, or create a cozy retreat for family and guests. At Gadi Construction, we specialize in designing and building ADUs that perfectly match your property’s style, space, and purpose.
Every project is guided by thoughtful planning, quality craftsmanship, and a commitment to turning unused areas into comfortable, high-value living spaces. Our goal is to make your ADU not just a structure but a seamless extension of your home that enhances your lifestyle and investment for years to come.
Our Kitchen Remodeling Process
We follow a seamless, structured process to ensure your kitchen remodel is smooth and stress-free from start to finish.
1
We begin by understanding your ideas, style preferences, and project goals to create a plan that aligns with your lifestyle.
2
Our experts design your kitchen in 3D so you can see exactly how the final space will look before construction begins.
3
We guide you in selecting high-quality materials from cabinets and lighting to flooring and countertops that complement Alameda’s architectural charm.
4
Our skilled craftsmen execute each stage with precision, care, and respect for your home.
5
Every detail is carefully inspected to ensure perfection, durability, and your complete satisfaction.
Innovative ADU Design Ideas for San Jose Homes
San Jose’s balance of modern convenience and suburban comfort inspires homeowners to think creatively about ADU design. At Gadi Construction, we help you bring those ideas to life, crafting spaces that are functional, stylish, and built around your unique goals. Whether you need extra living space for family, a home office, or a rental unit, we’ll design an ADU that fits your lifestyle perfectly.
Here are six in-demand ADU styles among San Jose residents
A private and independent living unit that blends effortlessly into your backyard. It’s ideal for short-term guests, long-term tenants, or multi-generational families. With smart layouts and premium finishes, this ADU feels like a complete home of its own.
Perfect for homeowners who want to expand living space while maintaining a connected home layout. These units are attached directly to your main house yet designed to provide privacy and comfort. It’s an ideal setup for parents, adult children, or in-laws.
Transform your unused garage into a modern apartment, rental suite, or workspace. This design maximizes your existing footprint, offering a cost-effective way to add livable square footage without a major addition.
Convert your basement into a bright, livable apartment with modern lighting, ventilation, and elegant finishes. It’s a great option for guest housing or generating rental income while keeping your home’s layout efficient.
Tailored for professionals or creatives, this ADU provides peace and focus for remote work. Designed with comfort and productivity in mind, it can double as a guest suite or small rental space when needed.
For homeowners who love to host, this design offers a high-end private suite with premium materials and a warm, inviting atmosphere. It adds sophistication and long-term value to your property.
Full-Service ADU Planning and Construction in San Jose
At Gadi Construction, we manage every stage of your ADU project from design and permitting to final construction. Our process is simple, transparent, and customized to your needs. We make sure your new ADU follows all local codes while offering comfort, energy efficiency, and long-term durability.
Our team combines architectural skill with construction expertise to deliver results that exceed expectations and complement your home beautifully.
Our services include:
- Custom ADU Design & Space Planning
- Permit and Zoning Assistance
- Foundation & Framing
- Electrical & Plumbing Work
- Kitchenette and Bathroom Construction
- Cabinetry and Interior Finishing
Want to get in touch?
We’d love to hear from you.
Here’s how you can reach us…
Tell us about your project and get a personalized, no-obligation quote.
We specialize in remodeling and construction – from kitchens to full home makeovers.
Let’s bring your vision to life with expert planning and transparent pricing.
OR CALL TODAY FOR A FREE ESTIMATE:
480-314-8016
Our Services
Home Remodel
Bring new life to your home with expert remodeling that combines style, comfort, and functionality. Upgrade your home from floor to ceiling with a custom remodel tailored to your needs and lifestyle.
Common Area Remodel
Kitchens are the centerpieces of your home; they’ve become the center of most modern homes, a place where family comes together to share tastes, love, and stories.
Kitchen Remodel
Kitchens are the centerpieces of your home; they’ve become the center of most modern homes, a place where family comes together to share tastes, love, and stories.
Bathroom Remodel
One of the most common remodeling projects for homeowners is to remodel the bathrooms in the house. After all, this is probably the first place you visit in the morning and the last place you visit at the end of the day.
Additions
Anyone can use an extra room in their home. It could be a space for business, like an Airbnb unit, daycare (yes, we’ve seen that happen) if you would like it or need an additional guest room or bedroom.
ADUs
Maximize your property’s potential with a custom-built ADU. Whether it’s for rental income, a home office, or additional living space, our team designs and builds functional, stylish units that blend seamlessly with your property.
Basement Remodel
Transform your basement into a beautiful, functional living space, a cozy retreat, home office, or guest suite with expert remodeling your family will love.
Start Your ADU Project in San Jose Today
Make the most of your property with a professionally designed ADU from Gadi Construction. From creative design ideas to precise construction, we handle it all with care and expertise. Call us today to book a free consultation and see how we can help you create a beautiful, functional ADU that enhances your San Jose home and lifestyle.
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People Also Ask
Building an Accessory Dwelling Unit in San Jose, CA, typically ranges from $200 to $400 per square foot, depending on size, design, and site conditions. A standard 500-square-foot studio ADU often costs between $100,000 and $200,000, while larger one-bedroom units can exceed $250,000. Key factors influencing the final price include foundation work, utility connections, permits, and whether you choose a prefab or custom build. For a detailed breakdown of these two approaches, we recommend reviewing our internal article titled Prefab Vs. Custom ADUs: Santa Clara Cost Analysis. This resource specifically compares costs and timelines for prefabricated versus custom ADUs in the Santa Clara area, helping you budget accurately. Always obtain multiple bids from licensed contractors and account for potential site preparation expenses, such as grading or tree removal.
The $40,000 grant in California for ADUs refers to the CalHFA ADU Grant program. This grant provides up to $40,000 to eligible homeowners to assist with pre-development costs for building an Accessory Dwelling Unit. The funds can be used for expenses like architectural plans, permits, soil tests, and impact fees. It is a forgivable loan, meaning you do not have to repay it as long as you live in the property as your primary residence for five years. For homeowners in the Santa Clara CA and San Jose CA area, this grant can significantly offset initial costs. Gadi Construction recommends consulting with your local city planning department to confirm eligibility, as specific requirements can vary by jurisdiction.
For properties in San Jose, CA, the maximum square footage for a detached Accessory Dwelling Unit (ADU) is generally capped at 1,200 square feet. This limit applies to both new construction and conversions, though specific lot size and zoning regulations can influence the final allowable size. It is important to verify if your property is subject to additional restrictions from the city's planning department. For a thorough breakdown of local rules, including cost estimates and permit requirements, we recommend reviewing our internal article titled 'Santa Clara County ADU Planning Permission: The Complete 2026 Guide to Permits, Costs, and Regulations' at Santa Clara County ADU Planning Permission: The Complete 2026 Guide to Permits, Costs, and Regulations. This resource provides essential guidance for homeowners in the Santa Clara and San Jose area.
Building an Accessory Dwelling Unit (ADU) in San Jose involves several cost factors, including design, permits, and construction. On average, a standard detached ADU can range from $150,000 to $300,000, depending on size and finishes. Garage conversions are often more affordable, typically starting around $80,000. Key expenses include site preparation, foundation work, utility connections, and interior finishes. Permit fees in San Jose are based on valuation but generally run several thousand dollars. It is wise to budget for impact fees, though some may be waived for smaller units. For a detailed breakdown of integrating modern smart technologies into your project, refer to our internal article titled Voice-Controlled Homes: Santa Clara’s Tech Integration Guide. Gadi Construction recommends getting multiple bids and reviewing local zoning rules early to avoid unexpected delays.
