At Cornerstone Construction Co., we believe your home should reflect your lifestyle while offering lasting beauty, comfort, and value. We are not just builders – we are dedicated craftsmen who create stunning, functional spaces that bring families together and make every property more enjoyable to live in. Founded with the goal of delivering high-quality construction and remodeling solutions, our company has grown into a trusted name serving Marin, Sonoma, Napa, and the surrounding counties.

Our team specializes in a full range of residential construction services, including custom decking, kitchen and bathroom remodels, ADU construction, framing, new driveways, pool and spa decks, and outdoor kitchens and fire pits. From concept to completion, we focus on understanding your needs, respecting your budget, and delivering results that exceed expectations. Every project we take on is built with precision, using premium materials and modern design techniques to ensure durability and long-lasting beauty.

Homeowners choose Cornerstone Construction Co. because we prioritize communication, attention to detail, and customer satisfaction. We view each project as a partnership, working with you every step of the way to bring your vision to life while adding real value to your home. Whether you’re upgrading a single space or transforming your entire property, our commitment to excellence remains the same.
Let us show you how we can turn your ideas into reality. Contact Cornerstone Construction Co. today to schedule a consultation and start planning your next construction or remodeling project in Marin, Sonoma, or Napa County.