Nantucket Custom Homes and General Contracting Experts.

J. Martinson Builders is a Nantucket-based construction company specializing in custom residential projects, including new builds, renovations, additions and finish carpentry. We are passionate about creating exceptional homes that stand the test of time, while delivering an unparalleled experience for our clients.

With a commitment to superior craftsmanship and a focus on the finest details, we specialize in creating custom homes that blend modern amenities with Nantucket’s historic character. Whether upgrading an existing property with contemporary features or building a new home that complements the island’s landscape, we work closely with you to design a home that meets your unique needs while respecting the tradition and history that makes Nantucket so special.

Our goal is to redefine the construction experience by providing more than just top-tier craftsmanship, but a process that is transparent, easy to navigate, and built on trust. We take pride in working closely with each client, ensuring that every detail is thoughtfully considered and each challenge is proactively addressed. From the planning stage to the final walk-through, our team is committed to delivering a home that surpasses your vision, something we can all be proud of.

At J. Martinson Builders, we don’t just build houses; we build relationships. We value open communication, integrity, and a work ethic that puts quality first. Our clients can be confident that they’ll experience a seamless process and that their home will be built with the highest standards of craftsmanship and care—resulting in a space they’ll love for years to come. We want to earn your trust, and we want to be the builder you rely on for every future project.