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We believe that design should not follow a specific set of rules. Mercer Built uses unexpected influences to create unique, inviting, and compelling homes.


Justin Marinoff is a third generation contractor, a lineage that began with his grandfather who founded Marin Restoration in 1967, to his father, who he worked closely within the family founded business. It was at Marin Restoration, where Justin learned the importance of his clients’ needs, quality of craftsmanship and the building and restoration business on a higher level. A hands-on contractor, Justin enjoyed and took pride in each renovation project, adding creativity, style, and custom qualities.
Mercer Built was formed in 2013 as Justin grew more interested and knowledgeable in design and development, . Diving into larger more detailed projects, Justin was now building 6500 square foot homes with functionality, innovative style, and distinctive architecture.
Mercer Built has specific goals: most importantly to capture the homeowners’ lifestyle, needs, and desires. Mercer Built prides itself on building unique custom homes of the highest quality with the finest materials while offering the most personal and professional service to their clients. Mercer Built creates distinguished, intimate and stylish spaces that reflect the homeowners’ personality and style. From conceptualizing a project to designing the renderings, to the actual build, down to the last coat of paint, Justin works step by step with his clients creating a comfortable and enjoyable experience. All projects feature custom cabinetry and millwork, detailed exteriors and innovative moldings, with cutting-edge finishes to match.
Mercer built wants nothing more than to build homes with classic understated elegance and timeless style for its clients. The team prides itself on taking care of clients, long after they hand over the set of keys, or open the gate.
We guarantee our work and hold ourselves accountable in ensuring our clients’ vision come to life. We are confident that your new home will exceed all expectations. Our clients are buying not only the brand but the lifestyle of the highest quality and standards of what a beautiful home should be.

What we do

  • Ground up custom homes
  • Additions
  • Kitchens
  • Bathrooms
  • Foyers
  • Libraries
  • Indoor /outdoor rooms
  • Exteriors
  • Repurposing space