Marin County is a breathtaking county located in the northwestern part of the San Francisco Bay area, across the Golden Gate Bridge. It allows anyone to drive through the bustling city and into the serene redwood groves, beaches, mountains, and vineyards within minutes. Known for its stunning landscape and great weather, Marin County is ideal for outdoor trips and other recreational activities. While Marin is among the smallest counties in the Bay Area, it offers plenty of space and various environments that can cater to everyone’s needs.

Building a home or business in Marin requires working with experienced contractors who can assist and guide you through every step of the process. This article lists nine of the best construction companies in Marin County, California. These firms were chosen for their impressive portfolios, lists of clients, specializations, and services. 

Trainor Commercial Construction, Inc.

1925 Francisco Blvd. East Ste 21, San Rafael, CA 94901

Trainor Commercial Construction, Inc. (TTCI) offers general construction, pre-construction, and construction management services. The firm’s portfolio includes high-end retail stores, restaurants, hotels, and corporate interiors. Since 2001, it has completed numerous projects for a diverse client base, from local businesses to Fortune 500 companies.  These projects are carried out by a team of seasoned professionals. Some members of this team have 25 years of industry experience. They begin the projects by ensuring that everyone’s goals and objectives are aligned. Using this method, the firm completes its projects in a timely and accurate manner.

Brian and Suzanne Trainor founded TCCI. Brian is known for his dedication and passion for his work. He manages the company and acts as a liaison between clients, architects, and subcontractors. Suzanne, on the other hand, is an accomplished business executive and serves as the executive team’s advisor. Their combined skills and expertise total 70 years of industry knowledge. TCCI has been in the business for two decades and has consistently delivered outstanding results, for which it has received recognition. Among these achievements are a Grand Prize and a Design Award from the Association for Retail Environments (ARE). TCCI is also the recipient of two international design awards from the Retail Design Institute. 

Sausalito Construction, Inc.

75 Pelican Wy. San Rafael, CA 94901

Sausalito Construction is a custom home builder and remodeler founded in 2001. It focuses on luxury residential and high-end commercial construction projects. Since its beginning, the firm has strived to make every building process as comfortable and smooth as possible. To achieve these circumstances, it upholds strong working relationships with local building departments, inspectors, clients, and partners. The firm also combines old-world craftsmanship with new technologies for durable and lasting projects. These practices help in fulfilling the needs of clients and ensure that their goals are represented in their projects.

With its diligent nature, Sausalito Construction has become among the leading firms in the area. This prestige is because of principals Gale Greisen and Don Scheiner, who have 75 years of combined experience. Sausalito Construction is well-versed in providing cost-effective projects that do not sacrifice quality. Greisen and Scheiner manage offices and warehouse facilities in San Rafael, as well as 45 full-time staff members. They serve customers in Marin, Napa, and Sonoma Counties.

Alten Construction

1141 Marina Way South, Richmond, CA 94804

Alten Construction began in the basement of founders Robert and Shannon Alten in 1995. Today, the firm is a leading general contractor serving the San Francisco Bay Area. Projects at the firm are all client-focused, which enables it to produce intuitive projects with the highest quality standards.  Since its establishment, the firm has fostered a cohesive team of professionals. This team has completed projects totaling two million square feet. Projects completed encompass commercial and educational sectors, as well as laboratories. The firm has also performed historic renovations, seismic and structural improvements, and sustainable construction on various structures. Alten Construction provides these projects by integrating innovative methods and state-of-the-art technologies.

Alten Construction performed a design-build service for the Bill and Adele Jonas Center. The new one-story, 10,800-square-foot building includes a banquet hall with a raised platform, restrooms, a prep kitchen, a support space, and a lounge space. The Jonas Center also features roof framing with exposed beams and floor-to-ceiling glass windows for natural light and ample outdoor views. 

Kasten Builders

3419 Regatta Blvd. Richmond, CA 94804

Kasten Builders, founded in 1972, builds long-term partnerships through excellent communication, collaboration, and quality control. These commitments apply to both clients and its proficient team who have become an essential part of the firm’s success and process. Valuing a personalized experience, the firm helps clients navigate their projects from the design, construction, and completion stages. It employs smart building practices, exceptional craftsmanship, and rigorous project management for residential and commercial projects. It serves a long list of clientele across the counties of Marin, Sonoma, San Francisco, and Alameda. Several projects have also been featured in Marin Home Magazine, San Francisco Chronicle, and Design for Living Magazine.

The featured home is located in Stinson Beach and was built in compliance with Federal Emergency Management Agency (FEMA) requirements. Kasten Builders demolished an old home on the site and built three new detached structures. The result is this stunning contemporary home, which includes a garage, guest quarters, and a bedroom wing. An elevated kitchen and dining area are also constructed. These areas are ideal for hosting events and provide expansive views of the ocean. The scenery is emphasized throughout the interior with the use of large windows, making the home feel bigger and airy. 

Farallon Construction

81 Filbert Ave. Sausalito, CA 94965

Farallon Construction is a premier construction firm with projects featured in The New York Times, The Wall Street Journal, and Dwell Magazine. Working as a general contractor, the firm recognized that successful projects require a collaborative effort from different groups and visionary minds. The Sausalito-based firm approaches its work with zeal, passion, and precision. It offers clients practices that highlight creativity while also bringing quality standards to its projects. Farallon Construction focuses on residential remodels, custom home construction, and historic preservation.

Farallon Construction is the general contractor for the project featured. The scope of work includes removing older elements while maintaining the mid-century modern style of the home. Among the major remodels in the project include the relocation of the living spaces to take advantage of the Bay and Mount Tamalpais views. The new living space includes large windows and skylights. Both of these features are highlighted by a neutral color palette. Other work includes the construction of an Accessory Dwelling Unit (ADU). 

Fontana Construction Inc

1945 Francisco Blvd. E #N, San Rafael, CA 94901

Fontana Construction started in 1986 as a small, home-based business in West Marin. The primary goal of founders Michael and Bonnie Fontanta is to provide a client-centered service based on professionalism, integrity, and superior quality. For 37 years, these goals have become the foundation for the firm’s stunning reputation. Fontana Construction specializes in custom home construction, remodeling, and renovation. It also offers structural retrofits, maintenance and repairs, light commercial construction, and value engineering services. Dedicated to outstanding quality, the Fontana team is composed of diversely skilled estimators, project managers, superintendents, and carpenters. This team is currently led by president Stevan Fontana, a second-generation builder. 

This Sausalito residence was built in 1995 by Fontana Construction. Two decades later, the owners contacted the firm to remodel and update the home. The firm collaborated closely with the clients to ensure that their needs were met. The large windows that surround the living room are one of the project’s standout features. These windows allow clients panoramic views of the Bay, perfect for entertaining guests and relaxing. 

Floyd Construction Inc

714 C St. #207, San Rafael, CA 94901

Floyd Construction is known for being a versatile firm, offering a broad range of construction services to clients in Marin County. Founded in 1978, the firm began with small repair and remodeling projects before expanding into high-end custom home construction. The firm is also experienced in commercial construction and landscaping projects. Overseeing these projects is founder and president Joe Floyd. For 45 years, Floyd has valued building relationships with clients. This value has been a vital part of the firm’s ability to take the necessary steps to provide projects that precisely match the clients’ visions. Having done this practice, the firm has consistently been trusted by repeat and new clients.

Floyd Construction performed a whole-house interior remodel for this project. The 6,000-square-foot home features a kitchen, master suite, three and a half bathrooms, and hardwood floors. The cabinets were custom-made and designed to the designer’s specifications. Other key features of this project are a hidden wine room and a media room. The latter is built with custom walnut paneling that was installed by the firm’s finish carpenters.

Singlepoint Design Build

200 Gate 5 Rd. Ste. 109, Sausalito, CA 94965

Singlepoint Design Build has built outstanding homes in Marin County using its proven methodology and with its highly experienced team. The firm, which was established in 2010, specializes in ground-up residential construction and full-home remodels. It approaches these projects with a design-build method where contractors and designers work as a team. Clients benefit from this method because it provides them with a cost-effective project that is completed on time, all coordinated by the same team. For 13 years, this method has led to an impressive portfolio that showcases projects in modern, contemporary, traditional, farmhouse, and traditional styles. The firm is led by founder Brant Hill. His skills and experience catapulted the firm to become among the premier home builders in the area. 

The project featured is a traditional home that was remodeled by Singlepoint Design Build. The firm was tasked with interior remodeling, some exterior work, and major site upgrades. The interior was structurally upgraded and modernized. The exterior features a rock wall for the landscape and a pool. During the construction of this project, the owners were in Europe and were consistently updated on every progress. The firm’s team has also collaborated closely with them on objectives, ideas, and decision needs. 

New Dimension Builders

205 Camino Alto Ste. 140, Mill Valley, CA 94941

The team behind New Dimension Builders has worked together for two decades. With these many years, the team works in a flawless and coordinated way to deliver projects. It also developed a service that emphasizes sharing of ideas, open communication, and putting the clients first. Through this service, each project is carefully researched, worked on, and presented based on the vision of its owners. New Dimension Builders has thoughtfully completed projects all over Marin, Sonoma, and San Francisco County.

New Dimension Builders is a general contracting firm that provides new construction and remodeling services to residential and commercial clients. Its services include pre-construction, green building, and construction management. It was founded in 2007 by Dirk von Rueben. Trained and educated in Germany, von Rueben brought his passion for European craftsmanship and sustainable technology to each project. Under his leadership, the firm provides individualized attention to clients that provide impeccable results.


  • Jake Gustafson

    Jake has served as Senior Editor at General Contractors and brings a wealth of experience rooted in his passion for building. Holding a degree in Construction Engineering Management from Oregon State University, he actively engaged in industry-related activities, including membership in the Associated General Contractors of America student chapter and participation in the Associated Schools in Construction student competition. Previously, Jake served as a project engineer for a prominent general contractor in Portland, where he played a pivotal role in various aspects of construction projects, from pre-construction to subcontractor management. His expertise extends to working on innovative projects, such as North America's largest CLT commercial building. Expertise: Commercial Construction, Commercial Remodeling, Home Design and Build Key Highlights: Editor at General Contractors, Project Engineer for Portland-based general contractor, Field Engineer for the largest CLT commercial building in North America Education: Oregon State University, Degree in Construction Engineering Management