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ExpandADU | Prefab ADUs
About the business:
At ExpandADU in Fremont, we specialize in prefabricated Accessory Dwelling Units (ADUs), revolutionizing residential construction. Our focus is on delivering high-quality, custom ADUs that expand living spaces while maintaining the integrity of your property.
We pride ourselves on our expertise in crafting innovative and sustainable solutions tailored to meet each client's unique needs. Whether you seek additional living quarters for family members or a rental income source, our team is committed to delivering exceptional results.
Located in Fremont, we are a Construction Company dedicated to providing homeowners with efficient, flexible, and eco-friendly ADU solutions. Our dedication to excellence shines through in every project, as we work tirelessly to ensure your vision becomes a reality.
Choose ExpandADU for your prefabricated ADU needs and experience the difference of working with a company that truly understands the value of space, sustainability, and quality craftsmanship.
Photos and videos
Hours of operation
- Mon – Fri
- Sat – Sun
- 9:00 AM – 6:00 PM
- 9:00 AM – 8:00 PM
Latest reviews
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Sekar Mokachandra9 June 2026
I had an excellent experience working with the Expand ADU team, especially Santosh and Swathi, on my ADU construction project. From start to finish, they managed everything end-to-end with strong coordination, professionalism, and attention to detail.
What truly sets them apart is their commitment beyond just construction. The project was completed on time and within budget, and Swathi went the extra mile by helping us secure renters for the ADU, which added tremendous value.
Even with several challenges—particularly delays and hurdles with PG&E timelines—the team remained proactive and solution-oriented. They didn’t hesitate to go above and beyond, including working with higher officials when needed to keep the project on track.
Their dedication, transparency, and hands-on approach made the entire process smooth and stress-free. We are not only recommending Expand ADU to our friends, but we have also started another project with them because of how satisfied we are with their work.
A heartfelt thank you to Santosh and Swathi for their hard work, dedication, and genuine passion for what they do. Their commitment to community housing development and their efforts in supporting local job creation truly make a meaningful impact.
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ALMA ARMAS9 June 2026
Great contractors! Very easy to work with and reliable. Reliability and trust are very important when choosing a contractor and these guys are it.
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Raghupathi S9 June 2026
I got the ExpandADU contact details phone number from 92.3 FM Radio Advertisement. When I called Santhosh of ExpandADU, he was immediately available and graciously professional.
My project involved a whole house demolished with a Two Floor ADU addition. My Lot Size is pretty small and an irregular Shape corner lot with complicated Set back restrictions, Santhosh had diligently follow-up my queries quickly and effectively. Santosh sincerely care about the customers and explained every small details in full. I'm satisfied with his service received. Santosh has always met my expectations and has resolved promptly, efficiently and successfully. ExpandADU currently does not support Two Floor ADU addition, but Santosh guided to review my current house earlier plan permits and drawings and suggested an Architect from his network connection with whom I am consulting now. Looking forward to collaborate with Santosh for his expertise advise and support later during my house construction. Thanks Santosh!
