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About Us

43 years in business
16x Best of Houzz winner
Offers Custom Work
Industry Leading Architects & Building Designers in San Francisco
We believe that designing timeless, sustainable houses should be fun and collaborative. Founded in San Francisco in 1980, Gast Architects is a service-oriented practice specializing in custom residential homes and renovations, including both contemporary solutions and the sensitive restoration and adaptation of historic properties. We offer comprehensive architectural services and take pride in the close working relationships we develop with our clients in responding to their needs, taste, budget and schedule, while maintaining architectural design excellence. Sustainable design strategies are integral to the design process, and several on our team are experienced LEED Accredited Professionals. Our projects range in scope from the development of large country properties and inner city whole house renovations to more modest additions to and remodeling of existing housing in styles from warm modern to traditional. We enjoy, and are skilled at, working with the limitations and opportunities inherent in renovating or adding to existing structures. Our long-term relationships with contractors, craftspeople and consultants strengthen the trust and effective team communication necessary for producing superior results. Having practiced in the Bay Area for decades, we know the local Planning and Building agencies and their staffs, and how to work with them to secure code interpretations before problems arise. We have represented our clients successfully before commissions, design review panels and appeal boards, and are adept at moving our projects through the approvals maze. Gast Architects is licensed in California. We are honored to participate in the San Francisco Green Business program.

Services Provided

Accessory Dwelling Units (ADUs), Architectural Design, Architectural Drawings, Attic Conversion, Barn Design & Construction, Basement Design, Bathroom Design, Energy-Efficient Homes, Green Building, Guesthouse Design & Construction, Handicap-Accessible Design, Historic Building Conservation, Home Additions, Home Extensions, Home Gym Design & Construction, Home Remodeling, Home Restoration, Kitchen Design, Laundry Room Design, Multigenerational Homes, New Home Construction, Outdoor Kitchen Design, Pool House Design & Construction, Project Management, Space Planning, Staircase Design, Sustainable Design, Universal Design, Custom Home, 3D Home Design

Areas Served

Alameda, Belvedere, Belvedere Tiburon, Berkeley, Marin City, Mill Valley, Muir Beach, Oakland, Piedmont, San Francisco, Sausalito, South San Francisco, Tamalpais-Homestead Valley, Tiburon, Palo Alto, Sonoma & Napa Counties, Marin County, Hawaii, SF East Bay, SF Peninsula, Central Coast, Woodside, Atherton, San Mateo, Redwood City, Hillsborough, Napa, Sonoma, Healdsburg, Portola Valley


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Business Details

Business Name

Gast Architects

Phone Number

(415) 885-2946


355 11th Street, Suite 300
San Francisco 94103

Typical Job Cost

$500,000 - 16 million

License Number

CA C-26969; WY C-3546


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Gast Architects
Average rating: 5 out of 5 stars

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