Looking to add more living space or generate rental income? At Quartz Construction, we specialize in designing and building Additional Dwelling Units (ADUs) that provide functionality, style, and long-term value. Whether you need a guest house, in-law suite, backyard cottage, or rental unit, our expert team ensures a seamless construction process that enhances your property.
We offer comprehensive ADU design and construction services tailored to your needs, including:
A detached ADU is a fully independent living space separate from the main house. This option provides maximum privacy, making it ideal for rental income, guest accommodations, or even a personal retreat. With its own entrance, kitchen, and bathroom, a detached ADU offers complete autonomy while adding significant value to your property.
An attached ADU is an extension of the primary residence, seamlessly integrating with your existing home while creating additional living space. This type of unit is perfect for multigenerational families or homeowners who want extra space without sacrificing the convenience of proximity. Attached ADUs can share utilities with the main house, making them a cost-effective and practical choice.
Transforming an existing garage into an ADU is a smart way to repurpose unused space. Whether you envision a home office, rental unit, or guest suite, a garage conversion offers a budget-friendly solution with minimal structural modifications. Proper insulation, ventilation, and lighting upgrades ensure the space is comfortable and fully functional.
A basement ADU allows you to utilize existing square footage to create a self-sufficient living space. This setup is perfect for long-term rental opportunities or accommodating family members who need a private area. With strategic design, basement ADUs can feel bright and inviting while maximizing every inch of space.
Building an ADU above the garage is an excellent way to add living space without expanding your home’s footprint. This type of unit provides privacy while making use of an otherwise underutilized area. Whether used for guests, tenants, or a home studio, an above-garage ADU is a creative and efficient housing solution.
✔ Expertise in ADU Construction – Years of experience building custom ADUs.
✔ Custom Designs Tailored to Your Needs – Unique layouts to fit your lifestyle.
✔ Efficient & Stress-Free Process – We manage everything from design to completion.
✔ Energy-Efficient & Sustainable Solutions – Reduce utility costs with modern, eco-friendly materials.
✔ Fully Licensed & Insured – Trusted and reliable ADU contractors in California.
An Additional Dwelling Unit (ADU) is a self-contained living space built on the same lot as a primary residence. ADUs can be attached, detached, or converted from existing structures like garages or basements. These units are an excellent way to:
✔ Create Extra Living Space – Perfect for family, guests, or a home office.
✔ Increase Property Value – A well-designed ADU adds long-term real estate value.
✔ Generate Rental Income – Rent out your ADU for passive income.
✔ Support Multigenerational Living – Ideal for aging parents or adult children.
✔ Eco-Friendly & Cost-Effective – Designed with energy-efficient features to reduce costs.
We evaluate your property, discuss your vision, and provide recommendations based on zoning laws and building regulations.
Our design team creates a functional and stylish ADU that blends seamlessly with your property, optimizing layout, materials, and features.
We handle the entire permit application process, ensuring compliance with California’s ADU laws.
Our skilled builders bring your ADU to life, managing everything from foundation work, plumbing, electrical, and finishing touches.
We conduct a thorough quality check before handing over your fully functional ADU, ready for occupancy or rental use.
California has relaxed ADU regulations to encourage homeowners to build additional housing. Some key requirements include:
Expand your home’s potential with a custom-built ADU from Quartz Construction. Whether you’re looking to create a guest house, a rental unit, or a private living space, we handle every step of the process.
EXCELLENT Based on 44 reviews Monty Zhang2025-01-23Trustindex verifies that the original source of the review is Google. I had a great experience working with Ohad on a backyard office addition. He is super responsive and attentive to every little detail, from recommending materials to selecting the color and finish of the project. It turned out better than we expected. Thank you, Ohad! Yaffa Zaitlis2025-01-13Trustindex verifies that the original source of the review is Google. My husband and I are so happy we picked Quartz construction for our 2 remodeled bathrooms! They have a great eye for design and small detailing. They did everything to get everything done on time which was very important to us. Highly recommended! Simon Eliash2025-01-13Trustindex verifies that the original source of the review is Google. I am beyond impressed with the outcome of the work Quartz Construction did. From the initial consultation to the final touches, Ohad and the team were very professional and always available to communicate and answer any question we had. Thank you for your outstanding work! Sage Jackson2024-11-27Trustindex verifies that the original source of the review is Google. The interior was completely remodelled, including the removal of a non-load-bearing wall, the removal of the popcorn ceiling, the installation of recessed lighting throughout the house, and the replacement of the kitchen, two bathrooms, and flooring. Fiorella D.2024-09-23Trustindex verifies that the original source of the review is Google. Working with Quartz Construction was a stress relief. I recently had a pleasure working with Quartz Construction on our new beautiful deck. Ohad and his team were professional, highly skilled, courteous and attentive to my needs! The team show up on time, keep the property clean and give great customer service. We’re so happy with our experience with Quartz Construction and the results exceeded our expectations. I strongly recommend them. Mancie Yang2024-09-23Trustindex verifies that the original source of the review is Google. I just completed remodeling my two bathrooms and kitchen with Quartz Construction. Ohad and his crew are a great people to work with. They are very professional, responsive and did an incredible work.. Ohad managed every step from start to finish very well. I would highly recommend them and we plan to use them again in the future Olena Fedosyeyeva2024-09-23Trustindex verifies that the original source of the review is Google. We did our kitchen remodeling, and the whole process was well coordinated, within the agreed timeline. The team has been responsive and very professional! We are happy with the company chose and the result we got! Claire Kim2024-09-20Trustindex verifies that the original source of the review is Google. I reached out to 3 construction companies for my kitchen and living room remodeling project and ultimately chose to work with Ohad. I found him to be highly professional and knowledgeable about remodeling projects. Additionally, the quote he provided was exceptionally competitive compared to the other companies. Communication with his team was efficient and seamless, with no complaints. They listened to my feedback and incorporated my suggestions into the project, which I greatly appreciated. I highly recommend Ohad and his team to anyone looking for a reliable remodeling company for their home! Pam McGill2024-09-20Trustindex verifies that the original source of the review is Google. I recently had the pleasure of working with Quartz Construction for a bathroom remodel, and I am absolutely thrilled with the results! From the initial consultation to the final touches, Ohad and his team demonstrated exceptional professionalism and expertise. The design process was seamless; they listened carefully to my ideas and offered valuable suggestions that enhanced the overall vision. Throughout the project, communication was top-notch. Ohad kept me updated on progress and timelines, which made the entire experience stress-free. The craftsmanship is outstanding—every detail, from the tile work to the fixtures, reflects their commitment to quality. They completed the project on time and left my home clean and tidy each day. I couldn’t have asked for a better experience, and I highly recommend Quartz Construction for anyone looking to transform their space. They truly exceeded my expectations! Mz A2024-09-20Trustindex verifies that the original source of the review is Google. After years of deterioration of my deck, I got lucky one day while browsing a Home improvement magazine I received in the mail. A deck replacement ad caught my attention and without hesitation I called. Boy am I glad I did! The man answering the phone was personable and attentive to my needs. We made arrangements to meet, he arrived on time, discussed the job, gave me an estimate. We agreed and picked a date and on that day, his guys were on job site on time and all day until the job was done! They were professional, did a great job, cleaned up after themselves. I had a little confusion with my final payment, and Quartz construction was patient with me as I worked out the kink. As for the before and after, take a look at my pictures 🙂 Thank You Quartz team! P.S. look forward to doing the bathroom in the near future as we discussed
Quartz is a construction and remodeling company serving San Jose and the nearby areas. Our firm offers a wide range of services, including full-home renovations, kitchen remodeling, bathroom renovations, window replacement, deck building and repair, patio construction, and more.
Address: 1777 Hamilton Avenue #1080, San Jose, 95125 California, USA.
Mon-Sat: 08:00 – 19:00
© 2025 Quartz Construction and Remodeling, San Jose, California.