ADU Construction in Antioch
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- ADUs Construction
- Antioch
- Design custom ADUs for your Antioch property.
- Transform underutilized spaces like garages.
- Build detached backyard cottages for full privacy.
- Our team handles local permits and zoning.
- Get a two-story design to preserve your yard.
- Trust us for complete start-to-finish construction.
Accessory Dwelling Units (ADUs) are a great way to expand your living space and add value to your home. At Gadi Construction, we specialize in designing and building functional, stylish, and efficient ADUs across Antioch.
Whether you’re planning a rental unit, a private guest suite, or a comfortable home office, our team ensures every detail is tailored to your needs. We blend creativity and craftsmanship to deliver high-quality ADUs that enhance your property’s usability while complementing the charm of Antioch neighborhoods.
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 Designs for Antioch Homes
Antioch’s warm suburban setting and growing housing demand make it ideal for adding an ADU to your property. At Gadi Construction, we create modern, space-smart designs that bring both comfort and long-term value. Each ADU project is built to reflect your lifestyle and fit perfectly with your existing home.
Here are six popular ADU design ideas among Antioch homeowners
A private living unit that sits separately from the main house perfect for guests, in-laws, or tenants. It offers independence and privacy while maintaining a welcoming home feel.
Seamlessly extends your current home to create extra living space or a home office. It’s an excellent choice for multi-generational families looking for close yet separate living areas.
Turn your unused garage into a functional and stylish mini-apartment.
This affordable option maximizes your property’s existing footprint with comfort and efficiency.
Ideal for smaller lots, this design adds vertical space while keeping your yard intact. It offers a smart way to expand without sacrificing outdoor area or natural light.
Transform your basement into a cozy, livable unit with its own entrance and amenities. A perfect solution for renters or family members seeking comfort and privacy.
Modern, open layouts with sleek finishes designed for single living or short-term rentals. These units bring elegance and profitability to your property with minimal space.
Comprehensive ADU Construction Services in Antioch
At Gadi Construction, we handle every phase of your ADU project from initial concept to completion. Our experienced builders ensure smooth communication, code compliance, and exceptional workmanship at every step.
Our full-service ADU solutions include:
- Custom ADU Design & Planning
- Permitting and Zoning Assistance
- Foundation, Framing & Roofing
- Plumbing, Electrical & HVAC Installation
- Interior Finishing & Fixtures
- Landscaping and Final Touches
We build ADUs that are not only beautiful but also durable, energy-efficient, and compliant with all Antioch building standards.
Why the Bay Area Chooses Gadi Construction
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 explored a home addition for our growing family and these folks handled everything with a lot of thought. The builders explained the remodel plan clearly and made the space blend into the house naturally. It was a solid experience all around.
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.
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.
We worked with Nadav from Gadi Construction during the planning phase of our expansion project, and he was a fantastic advisor throughout the process. He helped us think through every detail — from design implications to quality considerations — and brought a thoughtful, thorough, and methodical approach to each discussion.
Nadav was always friendly, highly professional, and incredibly responsive. It consistently felt like he was acting as a truly independent advisor who cared deeply about building long-term relationships and making sure we would get the very best outcome for our project. His proposals were detailed, insightful, and clearly grounded in deep experience.
Although we ultimately moved forward with another contractor who came through a personal referral, that decision wasn’t a reflection on Nadav’s work or professionalism. Based on our experience, we’d be thrilled to work with him in the future and wholeheartedly recommend him to anyone looking for a trusted, high-quality construction partner.
I went with them for a kitchen makeover and it was worth every penny. The design team helped me see options I never thought about.
Their skilled builders were respectful of the house and kept everything tidy. It felt like a real partnership through the whole remodel.
The value added by the new layout is already noticeable. I still walk in and smile because the remodel turned out exactly right.
Taking on a whole house renovation sounded stressful but they took the edge off. They walked us through each stage of the project so we always knew what was happening. The result feels like a true custom home remodeling job.
The bathroom remodel completely changed how our space feels. Their team helped plan everything so the design made sense and looked great. The quality build is obvious in every corner. It’s nice to have a space that’s functional and adds value at the same time.
We worked with this business for a full residential remodel, and it was a great experience. The skilled builders brought the design to life exactly as we imagined. Every room feels intentional and high-quality. I’d happily recommend them to anyone looking for a thoughtful and professional remodel.
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:
SAN JOSE AREA – 404-889-1000
SAN FRANCISCO AREA – (925) 639-3177
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:
SAN JOSE AREA – 404-889-1000
SAN FRANCISCO AREA – (925) 639-3177
Start Your ADU Project in Antioch Today
Ready to make the most of your property? Contact Gadi Construction today to discuss your ADU vision. Our Antioch specialists will help you design and build a space that adds value, comfort, and versatility to your home. Call us now and let’s bring your dream ADU to life efficiently and beautifully.
Related Projects
People Also Ask
The $40,000 grant in California typically refers to the California Housing Finance Agency (CalHFA) ADU Grant Program. This initiative provides forgivable loans of up to $40,000 to qualified homeowners to cover pre-development costs associated with constructing an Accessory Dwelling Unit (ADU) or Junior ADU (JADU). Eligible costs include impact fees, planning, design, soil testing, and permit applications. The grant converts to a loan that is forgiven over five years, provided the homeowner remains in the property and the ADU is rented to a low-income tenant at an affordable rate. This program aims to increase the state's affordable housing stock by incentivizing ADU creation. Homeowners must meet income and other eligibility criteria, and funding is often administered through local partners.
The cost to build an Accessory Dwelling Unit (ADU) in Contra Costa County typically ranges from $150,000 to $400,000 or more. This wide variation depends heavily on the ADU's size, type, and complexity. A basic prefabricated or garage conversion can be at the lower end, while a new, custom-built detached unit with high-end finishes will reach the higher end. Key cost factors include site preparation, foundation work, utility connections (sewer, water, electrical), permit fees specific to the county and local city, and material choices. It is crucial to obtain detailed quotes from licensed contractors familiar with Contra Costa's specific building codes and ADU ordinances, as requirements for setbacks, parking, and utility hookups can significantly impact the final budget.
The cost comparison between building an ADU (Accessory Dwelling Unit) on-site and purchasing a prefabricated one is nuanced. Generally, prefab ADUs can be cheaper and faster due to controlled factory construction, which reduces labor time and material waste. However, site-built ADUs offer greater customization and may better match existing architecture, potentially increasing property value. Key cost factors include site preparation (foundation, utilities), local permitting fees, and finish selections. For either option, total costs vary widely by region and project scope. A prefab might have a lower base price, but final installed costs can converge. Obtaining detailed quotes for both methods specific to your location and needs is essential for an accurate financial decision.
The cost comparison between adding on to an existing home versus building a new Accessory Dwelling Unit (ADU) depends heavily on specific project conditions. Generally, a well-planned ADU can be more cost-effective per square foot than a complex, custom home addition, especially if it utilizes prefabricated components or a detached garage conversion. Additions often involve intricate ties to the existing structure's plumbing, electrical, and foundation, which can increase costs and complexity. However, an ADU requires its own separate systems and must meet all zoning and code requirements for an independent dwelling. The cheaper option ultimately depends on your property layout, local permit fees, construction methods, and whether existing infrastructure can be easily extended. A detailed cost analysis from a qualified contractor is essential.
Affordable ADU construction in Antioch involves strategic planning to maximize value while adhering to local regulations. Key to affordability is selecting a design that minimizes complex foundations and roof lines, utilizing cost-effective yet durable materials like vinyl siding and laminate flooring. It is crucial to work with a licensed contractor experienced in Antioch's specific permit process, including zoning for accessory dwelling units. Prefabricated or modular ADU options can significantly reduce labor costs and construction time. Always obtain multiple detailed quotes and ensure your contract clearly outlines the scope, timeline, and payment schedule. Proper planning and a clear budget focus on the essentials can make adding an ADU a financially viable project for increasing property utility and value.
The cost of ADU construction in Antioch, California, varies widely based on size, design, materials, and site conditions. On average, you can expect a starting range of approximately $150,000 to $300,000 or more for a fully permitted, turnkey accessory dwelling unit. Key cost factors include foundation work, utility connections, interior finishes, and permit fees from the City of Antioch. It is crucial to budget for site preparation, which may involve soil testing or grading, and to account for potential impact fees. To ensure financial accuracy, obtaining multiple detailed quotes from licensed local contractors familiar with Antioch's specific building codes and ADU ordinances is highly recommended. Proper planning and a clear contract are essential for managing this significant investment.
