Cornerstone Construction | Home Additions, Kitchens, Bathrooms & Foundations

Our Services

Custom Decking

At Cornerstone, we specialize in custom decking that enhances outdoor living spaces and adds value to every home. Our decks are designed to match your style, needs, and budget while being built with durable, high-quality materials. Whether you want a simple platform deck or a multi-level structure with built-in seating and features, our team manages the entire process from design to completion.

Serving Marin, Sonoma, Napa, and surrounding counties, Cornerstone is ready to bring your ideal deck to life. Contact us today to schedule a consultation and start building the perfect outdoor retreat for your home.

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Kitchen Remodels

REMODELING KITCHENS THAT ARE BOTH PRACTICLE AND REMARKABLE

Cornerstone provides kitchen remodeling services that blend beauty, functionality, and lasting quality. We offer complete solutions including custom cabinetry, countertops, lighting, and appliance installation to create a space that fits your lifestyle. Our experienced team ensures every project is completed with precision and care.

Proudly serving Marin, Sonoma, Napa, and nearby areas, Cornerstone is your trusted partner for a stunning, functional kitchen. Contact us today to schedule a consultation and start your remodel.

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Bathroom Remodels

WE CREATE UNIQUE BATHROOMS

With Cornerstone, your bathroom remodel will be completed with thoughtful design and expert workmanship. We build custom vanities, install new fixtures, and provide professional tile work to give you a bathroom that feels fresh, modern, and inviting.

Homeowners throughout Marin, Sonoma, Napa, and surrounding counties trust Cornerstone for quality bathroom renovations. Call today to discuss your ideas and schedule a consultation.

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Home Remodels

YOUR TOP CONSTRUCTION AND REMODELING PARTNER

At Cornerstone, we provide full-service home remodeling to improve comfort, beauty, and value. Whether you’re updating a single room or renovating your entire home, our skilled team manages every phase with attention to detail and quality craftsmanship.

Serving clients across Marin, Sonoma, Napa, and nearby areas, Cornerstone is ready to bring your vision to life. Contact us today to schedule your consultation.

ADU'S

BIG BENIFITS FOR SMALL HOMES

You've heard about the benefits of Dwelling Units (ADUs) and their increasing presence in the San Francisco Bay Area. Currently, you may be thinking about constructing an ADU and you seek the most skilled professionals to complete the project successfully.

Cornerstone Construction's Co. expert ADU builders in San Francisco can assist you in constructing a customized ADU to suit your specific needs. We are the trusted ADU builders in the Northern Bay Area and we take pride in our focus on detail, high-quality work, and innovation.

Reach out to us now to begin the construction of your ADU in the San Francisco Bay Area!

Additions

ENHANCING HOMES, ONE ROOM AT A TIME

Framing is the backbone of any construction project, and Cornerstone provides precision framing services that ensure strength and stability. We use top-quality materials and proven techniques to meet all structural requirements.

Serving Marin, Sonoma, Napa, and nearby areas, Cornerstone is the trusted choice for professional framing. Contact us today to get started on your project.

Foundations

STRONG FOUNDATIONS, LASTING QUALITY

At Cornerstone Construction Co., we provide professional foundation construction services to ensure your project starts with a strong and reliable base. Our team specializes in building durable foundations for new homes, additions, and remodels using high-quality materials and proven techniques. We focus on precision and structural integrity so your property is built to last.

Serving Marin, Sonoma, Napa, and surrounding counties, we are the trusted choice for dependable foundation work. Whether you need a new foundation, repairs, or upgrades, Cornerstone Construction Co. delivers results you can count on. Contact us today to schedule a consultation and get started on your project.

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Framing

SAN FRANCISCO'S CONSTRUCTION FRAMING EXPERTS

Framing is the backbone of any construction project, and Cornerstone provides precision framing services that ensure strength and stability. We use top-quality materials and proven techniques to meet all structural requirements.

Serving Marin, Sonoma, Napa, and nearby areas, Cornerstone is the trusted choice for professional framing. Contact us today to get started on your project.

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New Driveways

YOUR PRIMARY CONTRACTOR FOR NEW DRIVWAYS IN THE NORTHERN BAY AREA

Upgrade your property’s curb appeal with a new driveway installed by Cornerstone. We specialize in concrete and paver driveways built to last, with a range of design options to suit your home.

Proudly serving Marin, Sonoma, Napa, and surrounding counties, Cornerstone can build the perfect driveway for your home. Call us today to schedule a consultation.

Pool & Spa Decks

TRANSFORMING BACKYARDS INTO OASES

At Cornerstone, we create pool and spa decks that are as stylish as they are functional. Our team offers a variety of materials and layouts to match your backyard design while ensuring durability and safety.

Serving clients throughout Marin, Sonoma, Napa, and nearby areas, Cornerstone can transform your outdoor space with a custom pool or spa deck. Contact us today to get started.

Build Your Dream Space with Cornerstone Construction Co.

From kitchens and bathrooms to decks, ADUs, and full home remodels, Cornerstone Construction Co. delivers high-quality craftsmanship and stunning results that add beauty and value to your home. Contact us today to start planning your next project!