ADU Construction in Concord
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- Design custom ADU plans for your Concord home.
- Our team builds comfortable backyard guest cottages.
- Transform underused spaces into garage conversion suites.
- Trust us for complete basement apartment renovations.
- Create a compact home office with abundant natural light.
- Get modern, detached units built specifically for Concord.
Why the Bay Area Chooses Gadi Construction
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 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!
I had the pleasure of choosing Gadi construction for our bathroom renovation in Fremont. As a newer generation home owner, you could imagine , I know nothing about renovation and was dreading the process. Millie was extremely helpful in putting our mind at ease. She worked with us to to under our broader vision, see how they can be broken up into phases , what should be done together and what should be done another time so we wont exceed budget and be in construction hell.
Both me and my husband are busy professionals, and Millie made sure that our time was well spent on this project. She managed the setup for design, procurement, permits, inspection timeline and a project plan within our set budget.
She was a pleasure to work with !
I had the pleasure of choosing Gadi construction for our bathroom renovation in Fremont. As a newer generation home owner, you could imagine , I know nothing about renovation and was dreading the process. Millie was extremely helpful in putting our mind at ease. She worked with us to to under our broader vision, see how they can be broken up into phases , what should be done together and what should be done another time so we wont exceed budget and be in construction hell.
Both me and my husband are busy professionals, and Millie made sure that our time was well spent on this project. She managed the setup for design, procurement, permits, inspection timeline and a project plan within our set budget.
She was a pleasure to work with !
Nadav and team did a great job retailing our bathrooms
We are super happy with our experience working with Nadav and GADI Construction. We had water intrusion come from multiple areas, and our previous contractors left us in a lurch with those defects. Nadav had to creatively figure out where and why those areas were causing water to enter (we learned there were multiple reasons!) and how to prevent it and seal the interior. He had to creatively figure out how to solve it, and it all worked out great! He and his team always communicated with us throughout the project, and they exceeded our expectations. Highly recommend them!
I engaged GADI Constructions Inc to restore my unit in a high rise in San Jose. Right from the beginning Millie, Project Manager, was very professional and when entrusted with the job completed the repair and restoration work smoothly and in time with perfection with time to time progress reporting on phone and through video.
We recently engaged Gadi Construction for a home renovation project, and the experience exceeded our expectations. Their team demonstrated exceptional flexibility, efficiency, and accommodation, adapting seamlessly to our evolving needs while maintaining a high standard of workmanship. The quality of the final output was impressive, reflecting meticulous attention to detail. Millie, our dedicated project manager, along with her team including Mike, fostered a reassuring and collaborative environment throughout the process, ensuring clear communication and minimal disruption. We highly recommend Gadi Construction for any renovation endeavors; their professionalism and commitment to client satisfaction are commendable.
Concord is known for its peaceful neighborhoods, family-friendly environment, and spacious homes, with local landmarks like Todos Santos Plaza and the iconic Mount Diablo providing a scenic backdrop, making it the perfect place to add an Accessory Dwelling Unit (ADU). At Gadi Construction, we specialize in designing and building ADUs that add space, comfort, and long-term value to your property.
Our expert team turns your ideas into reality by blending style and functionality. Whether you want a rental unit, a guest house, or a private workspace, we ensure every detail is thoughtfully planned to match your home’s architecture and your personal needs.
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.
Creative ADU Designs for Concord Homeowners
ADUs in Concord can be designed to suit various lifestyles, from cozy studios to family-sized cottages. Our designers focus on efficient layouts, energy-saving construction, and beautiful finishes that complement your property’s character.
Explore some of the most requested ADU designs among Concord residents
A private, detached unit perfect for visiting family or friends. This design offers comfort, privacy, and a homely atmosphere surrounded by your garden’s tranquility.
Transform your existing garage into a modern, functional living space. We upgrade every detail, insulation, flooring, and lighting to create a stylish and independent ADU.
Use your basement to add a complete living area with its own entrance, kitchenette, and bathroom. It’s ideal for multigenerational living or generating rental income.
For those working from home, this ADU design offers a quiet, productive workspace with natural light and custom storage — balancing comfort and efficiency.
A contemporary-style structure built in your backyard, featuring sleek finishes, an open layout, and eco-friendly systems for a modern lifestyle.
Designed to maximize functionality and privacy, this ADU is perfect for generating steady rental income while enhancing your property’s overall value.
Complete ADU Design & Construction Services in Concord
From the first design sketch to final inspection, Gadi Construction handles every aspect of your ADU project. Our licensed builders and designers take care of permits, zoning requirements, and detailed construction, ensuring a smooth and stress-free experience.
Our ADU services include:
- Personalized ADU Planning & Design
- Building Permits & City Approvals
- Plumbing, Electrical & HVAC Setup
- Kitchenette & Bathroom Installation
- Flooring, Paint & Interior Finishes
Smart Technology & Energy Efficiency Solutions
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.
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 Building Your ADU in Concord Today
Enhance your home’s functionality and value with a beautifully designed ADU from Gadi Construction. Whether you need extra space for family, guests, or rental opportunities, we’re here to make it happen with quality craftsmanship and personalized service.
Contact us today to book your free consultation and see how a new ADU can elevate your Concord property’s comfort, value, and style.
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People Also Ask
The cost to build a 1200 sq ft ADU in California varies significantly by region, but for the Santa Clara and San Jose area, you should expect a range between $350,000 and $500,000. This estimate covers design, permits, foundation, structure, and standard finishes. Factors like site conditions, utility connections, and material choices heavily influence the final price. For a project of this size, you have two primary paths: custom construction or prefabricated units. To help you decide which option offers better value for your specific lot, we recommend reading our internal article titled 'Prefab Vs. Custom ADUs: Santa Clara Cost Analysis' at Prefab Vs. Custom ADUs: Santa Clara Cost Analysis. This resource breaks down the financial trade-offs for 1200 sq ft units in our local market.
The most cost-effective approach to an Accessory Dwelling Unit is typically a prefabricated or modular unit, which can significantly reduce on-site labor and construction time. For homeowners in Santa Clara and San Jose, a standard 500 to 600 square foot studio or one-bedroom ADU offers the best balance of functionality and cost. To minimize expenses, focus on a simple, rectangular floor plan with standard finishes and avoid custom architectural features. You should also consider a "conversion" ADU, such as turning an existing garage or basement into living space, as this eliminates the need for a new foundation and shell. For a detailed breakdown of all costs and permit requirements specific to our area, please refer to our comprehensive internal article titled Santa Clara County ADU Planning Permission: The Complete 2026 Guide to Permits, Costs, and Regulations. At Gadi Construction, we always recommend starting with a clear budget to avoid unexpected overruns.
Building an Accessory Dwelling Unit (ADU) involves careful planning, and several common mistakes can derail your project. A frequent error is underestimating the total cost, including utility connections, impact fees, and design expenses, not just the construction itself. Many homeowners also overlook local zoning rules, such as minimum lot sizes or setback requirements, which can halt progress. Another pitfall is failing to plan for proper drainage and utility infrastructure, leading to expensive retrofits. For a thorough understanding of these regulations in our service area, we recommend reading our internal article titled Santa Clara County ADU Planning Permission: The Complete 2026 Guide to Permits, Costs, and Regulations. Gadi Construction advises that skipping a professional site survey is another critical mistake, as it can reveal hidden issues with soil or access that affect the foundation. Finally, neglecting to secure the correct permits before starting work can result in fines or forced demolition.