William Duff Architects

William Duff Architects

About

William Duff Architects (WDA) designs thoughtful, timeless architecture shaped by clarity, craftsmanship, and a deep connection to place. Founded in San Francisco, the firm works with clients across diverse regions to create enduring residential and hospitality environments tailored to each client’s story and vision. Their work responds to context with an artist’s sensibility—knowing when restraint strengthens a design and when expression brings it to life. With capabilities across multiple sectors, the firm is particularly recognized for its design leadership in high-end residential and hospitality environments.

Backed by deep technical expertise and disciplined project management, WDA approaches every project as a collaborative partnership—prioritizing service, communication, and thoughtful execution from concept through completion.

Meet the team

William S Duff Jr, FAIA
William S Duff Jr, FAIA
Founder, Managing Principal
Jim Westover, AIA
Jim Westover, AIA
Principal, Residential Studio Leader
Patrick Kruger
Patrick Kruger
Principal, Hospitality Studio Leader
Jonathan Tsurui, AIA
Jonathan Tsurui, AIA
Associate Principal, Associate

Awards and recognition

2025
Luxe RED Awards
Restoration or Renovation: Regional Winner
2024
USGBC 2024
California Green Building Award of Merit, Health & Wellbeing
2025
SF Design Week Awards
Interior Design: Hospitality - Winner
2025
ENR West Regional Best Projects
Northern California - Best Renovation/Restoration

William Duff Architects
William Duff Architects
William Duff Architects

Testimonials

This is an absolutely exquisite use of an existing century-old hay barn. A daring and whimsical insertion of mirrored, conditioned boxes into a salvaged, slatted barn creates a beautiful respite from the wine country summer. The careful application of mirrors amplifies the rustic while avoiding the trivial game of material contrast. The correspondence with the landscape is wonderful. This is architecture for the soul and mind.

Big Ranch Road, Napa, California

From the very beginning, every detail you designed came together to create not just a house but a home. A home that nurtured our family, witnessed countless milestones, and was filled with laughter, joy, and unforgettable moments. Perfectly adapted to each stage, meeting our needs and making life smoother in ways we couldn’t have anticipated.

Wheeler Residence, Menlo Park, California

When the glass walls enclosing the rooms flanking the central outdoor space—living room on one side, family room on the other—are folded away, the area becomes the heart of the home. You get a very pleasant feeling when you see the house in motion. It’s an easy thing to witness here, given the relaxed flow from one area to another. “Living out the story we imagined for our family and our life has been the home’s greatest gift to us.”

Butterfly House, Menlo Park, California

The architecture, materials and function were all treated like pieces of artwork. The stunning space feels quintessentially Californian, exemplifying indoor/outdoor living while indulging the family’s love of entertaining and sports.

Vallejo Residence, San Francisco, California