Portola Valley Town Center




  • AIACC Energy & the Built Environment Steering Committee
  • American Institute of Architects Materials Knowledge Working Group
  • Association for Preservation Technology-Zero Net Carbon Council
  • Berkeley Unified School District Construction Bond Oversight Committee
  • Center for Early Intervention on Deafness
  • Ecological Building Network
  • Open Architecture Collaborative, San Francisco

SIEGEL & STRAIN ARCHITECTS design places that engage and inspire people. A few simple design principles guide our approach to every project:

  • Great projects are tied to place and tuned to climate;
  • Sustainable design is a fundamental aspect of good design;
  • Simple, elegant, and well-crafted design has staying power;
  • Close collaboration leads to better buildings and stronger communities.

We have worked with extraordinary clients over the last 30 years on a wide variety of projects, master planning large sites, and designing a wide range of new buildings, ­rehabilitations, adaptive reuse, and historic preservation projects. Many have been recognized with awards for design excellence, innovation in sustainable design, historic preservation, and research that sets new standards for our profession.

Siegel & Strain has long been a leader in sustainable design and we aim to raise the bar with every project. We design resilient and net-zero energy projects that are non-toxic, minimize embodied carbon, capture and reuse water, restore habitat, and mitigate the impacts of climate change. We are actively engaged in sustainable design advocacy, research, and education, serving on boards, advisory panels and advocacy groups, and sharing our knowledge and experience with students and colleagues.

Historic preservation and sustainability go hand-in-hand: we document and preserve cultural resources and we reuse the important manmade and natural resources embodied in existing buildings. Our historic preservation skill set ranges from evaluation and documentation of historic resources to adaptive reuse and rehabilitation of historic structures, and is augmented by our extensive experience with the specialized codes, standards, and review processes required for historically significant buildings.