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Additional Dwelling Units (ADUs) Construction

Maximize Your Property’s Potential with a Custom ADU

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.

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Our ADU Construction Services

We offer comprehensive ADU design and construction services tailored to your needs, including:

Detached ADUs

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.

Attached ADUs

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.

Garage Conversions

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.

Basement ADUs

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.

Above-Garage ADUs

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.

Additional Dwelling Units builders

Why Choose Quartz Construction for Your ADU Project?

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.

What is an ADU?

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.

Our ADU Building Process

1. Consultation & Site Assessment

We evaluate your property, discuss your vision, and provide recommendations based on zoning laws and building regulations.

2. Custom ADU Design & Planning

Our design team creates a functional and stylish ADU that blends seamlessly with your property, optimizing layout, materials, and features.

3. Permit Processing & Approvals

We handle the entire permit application process, ensuring compliance with California’s ADU laws.

4. Construction & Quality Execution

Our skilled builders bring your ADU to life, managing everything from foundation work, plumbing, electrical, and finishing touches.

5. Final Inspection & Completion

We conduct a thorough quality check before handing over your fully functional ADU, ready for occupancy or rental use.

ADU Requirements & Regulations in California

California has relaxed ADU regulations to encourage homeowners to build additional housing. Some key requirements include:

  • Lot Size & Zoning – ADUs are permitted on most residential lots.
  • Size Restrictions – Detached ADUs can be up to 1,200 square feet depending on local codes.
  • Parking Requirements – Some ADUs may not require additional parking.
  • Owner-Occupancy Rules – Some areas do not require the homeowner to live on the property.

Start Your ADU Project with Quartz Construction!

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.

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What Clients Are Saying About Us

Build Your ADU – Get a Free Quote!

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.

Location

Address: 1777 Hamilton Avenue #1080, San Jose, 95125 California, USA.

 Mon-Sat: 08:00 – 19:00

© 2025 Quartz Construction and Remodeling, San Jose, California.