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Gast Architects

San Francisco
Photo: Linny Morris Photography

Regions Served

  • Hawaii
  • New York City & Mid-Atlantic
  • Rocky Mountains
  • San Francisco & Bay Area

Services Offered

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, Hawaii, New York, and Louisiana.  We are honored to participate in the San Francisco Green Business program.

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  • David S. Gast, AIA, LEED AP


  • 355 11th Street, Suite 300
    San Francisco, CA 94103

Featured Projects

Cole Valley Residence

The lower flat of this two-unit, Cole Valley building was renovated to meet the needs of a growing, young family. The flat was reconfigured, transforming the old sloping laundry porch into a third bedroom. Two small additions of less than 100 square feet total allowed for banquette-style seating in a new kitchen bay, and the expansion of the only bathroom to include a bathtub for the kids, double sinks and a private toilet compartment. The formal dining room was converted into a more useful family room open to the adjacent renovated kitchen. A large center work island helps shape this area into the central gathering space for play, conversation and every-day family life.

(Visited 40 times, 1 visits today)
Photo: Paul Dyer Photography

Northern California Eichler

This 1964 Eichler house was purchased in original condition with vintage appliances, fixtures, and finishes.  The new owners, who are lovers of mid-century modern design, wanted to create a calm, light-filled, inviting and fun-loving home.  We worked with them to preserve the signature finishes of the house while creating a cook’s kitchen, opening up the floor plan, and updating the master suite.

(Visited 40 times, 1 visits today)
Photo: Mariko Reed

English Gothic Residence

This 1930’s English Gothic residence opening to a large, rear yard court has been completely renovated and expanded to meet our clients’ needs while respecting the historic language of the home. The garden-facing dining and living rooms feature floor-to-ceiling steel windows and doors, with exterior trellising for privacy and sun-control. New stairs surrounding a built-in hutch connect the remodeled kitchen and dining area with bedrooms above the dining room, and the garage and basement storage, wine cellar, and laundry below. Reorganized rooms and upgraded systems throughout the home bring it into the current day.

(Visited 40 times, 1 visits today)
Photos: Paul Dyer Photography

Buena Vista Residence

This 1913 Italian Revival was in need of substantial changes to meet the needs of a growing family. The kitchen was expanded and renovated to include an eating area with uninterrupted views of the Bay. The master bathroom was renovated to capture the timeless essence of the home while incorporating modern amenities such as a private steam shower. The ground level of the home was completely reconfigured to accommodate a spacious entertainment room, laundry room, bathroom and guest bedrooms.

(Visited 40 times, 1 visits today)
Photo: John Sutton Photography

Contemporary Edwardian Residence

In the process of renovating this house for a multi-generational family, we restored the original Shingle Style façade.  The home’s traditionally proportioned formal rooms flow naturally into more contemporary adjacent spaces that are unified through consistency of materials and trim details.

(Visited 40 times, 1 visits today)
Photo: Aaron Leitz Photography

Ashbury Heights Renovation

With the goal of opening the second floor living area to the outdoors, we remodeled a previously dark kitchen replacing walls with windows and connecting it to a newly designed roof deck above the client’s existing garage  with a short bridge.  The bridge features a spiral stair that flows to the lower patio and a BBQ tucked just outside the kitchen door.

(Visited 40 times, 1 visits today)
Photo: Mariko Reed

Arroyo Grande Modern Farmhouse

Our clients asked us to design their retirement home in the rolling hills near California’s central coast. They desired a contemporary farmhouse relating to the vernacular agricultural buildings of the area, yet in a style that would locate indoor/outdoor living spaces primarily on one floor. Low-maintenance and fire-resistant materials, solar water heating and photovoltaics, trellises and sunshades, and plantings to control heat gain and loss contribute to a sustainable and healthy home.

(Visited 40 times, 1 visits today)
Photo: Elliott Johnson

Chalk Hill Residence

A young family wanted to develop this seventeen acre parcel as their principal residence and a casual gathering place for extended family and friends. Central to their desires was easy flow to the lawn, pool, and gardens, capitalizing on views over the vineyards to the surrounding wooded hills. In addition to the main house, the property includes a pool, a pool cabana, and a separate small home that serves as a part-time residence for the owners’ parents. Sustainable features include photovoltaic panels, solar hot water and pool heating, radiant heating, and trellises and roof overhangs for sun control.

(Visited 40 times, 1 visits today)
Photos: John Sutton Photography

Sea Cliff Hideaway

This Seacliff Hideaway experienced a substantial renovation to meet the lifestyle needs of its current owners. The façade was updated to enable a stronger street presence through the addition of modern elements like a copper roof and awning as well as new landscaping. A combined sitting and dining area opening to a new rear deck and garden was developed and connected to a redesigned kitchen.

(Visited 40 times, 1 visits today)
Photo: John Sutton Photography

Coverage on Remodelista & Gardenista