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.
Kevin Lamara2025-04-25Trustindex verifies that the original source of the review is Google. We needed a full home remodel, and Hila delivered outstanding results. She managed everything seamlessly, from design to completion. Our home now feels brand new, with high-end finishes and a perfect layout. Couldn’t be happier! Karen Ruther2025-04-23Trustindex verifies that the original source of the review is Google. Ohad did an excellent job on our hardscape project. He transformed our outdoor area into a beautiful, low-maintenance space that looks incredible. The team was professional, efficient, and delivered beyond what we expected! george antoine2025-04-14Trustindex verifies that the original source of the review is Google. Hila was fantastic throughout our balcony renovation. She made great recommendations, and the final result exceeded our expectations. The structure is solid, the design is modern, and we now have an amazing view to enjoy every day. Ricardo Santos2025-04-08Trustindex verifies that the original source of the review is Google. Ohad and his team created a stunning patio for our backyard. The design complements our home beautifully. They used durable, high-quality materials. We now have the perfect outdoor space to relax and entertain guests! Lionarda Silva2025-04-05Trustindex verifies that the original source of the review is Google. We’re so happy with how our bathroom renovation turned out. Hila made the process smooth from start to finish—she guided us through choosing quality materials and kept everything on schedule. The final result is a beautiful, modern space that feels like a spa. We’ll definitely be coming back to them for any future remodeling projects. Mario Baseus2025-04-03Trustindex verifies that the original source of the review is Google. We are so happy with the deck they built us. Alona was professional and communicative and ensured that every detail was executed flawlessly. The craftsmanship is top-notch, and the service is fantastic. We love spending time outdoors on our newly built deck! Thanks a lot! Marc Pickett2025-03-26Trustindex verifies that the original source of the review is Google. We couldn’t be happier with our kitchen renovation! The updated design is both beautiful and functional, and the team’s expertise ensured a smooth and efficient project. Highly recommended! Linda Romero2025-02-07Trustindex verifies that the original source of the review is Google. Quartz Construction did an amazing job remodeling my bathroom in less than the estimated time. Their employees were very respectful, they made sure that they kept the area as clean as possible. Communication was very good between all parties involved. I would use/recommend them for other jobs. Sivan Siman-tov2025-02-04Trustindex verifies that the original source of the review is Google. We choose Quartz Construction and we couldn’t be happier. We have contacted Ohad as a reference from our friend who work with him on his full house renovation. We’re so happy with our new 870 square foot of addition including roofing, flooring, new kitchen and 2 bathrooms and will definitely use Quartz Construction again. 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!Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
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.