Business Details
27 Years
experience
Your Trusted Architectural Partner in Seattle
Founded in 1999, CAST architecture has established itself as a leader in contemporary architectural design across the Pacific Northwest. Our firm specializes in creating modern, sustainable spaces that enhance residential, commercial, and public environments. Guided by five core principlesdrawing inspiration from place, embracing collaboration, elevating the pragmatic, engaging communities, and committing to positive social impactwe deliver projects that balance functionality with aesthetic innovation. With a team of experienced professionals, including LEED-certified architects and AIA members, we prioritize environmental responsibility and community-driven design.Our work spans transformative renovations, affordable housing initiatives, and award-winning sustainable projects, reflecting a deep commitment to improving lives through thoughtful architecture. As an AIA 2030 signatory, we actively pursue carbon-neutral building practices while advocating for policy reforms to expand housing accessibility. Over 25 years, we have completed hundreds of projects that demonstrate our expertise in navigating complex site constraints, historic preservation, and cutting-edge sustainable technologies.
Services
Residential architecture
Sustainable design
Commercial renovations
Affordable housing
Community spaces
Historic preservation
Passive house design
Urban infill projects
Accessory dwelling units
Mixed-use developments
Details
- Year established: 1999
Highlights and features
- We offer 25 years of experience in Pacific Northwest architectural design.
- Our team includes LEED-certified professionals and AIA members.
- We pioneered Seattle's accessory dwelling unit pre-approved plans.
- Our firm holds multiple design awards for sustainable innovation.
- We actively shape housing policy as AIA 2030 signatories.
Associations and certifications
- American Institute of Architects (AIA)
- United States Green Building Council (USGBC)
- International Passive House Association (iPHA)
- Built Green
- Northwest EcoBuilding Guild
- AIA 2030 Commitment
What people say
Award-winning designs
Sustainable expertise
Community engagement
Policy influence
Historic preservation
Services
Residential architecture
We create modern residential spaces that balance aesthetic innovation with functional living requirements. Our designs incorporate sustainable materials, energy-efficient systems, and site-specific solutions that enhance Pacific Northwest landscapes. Projects range from single-family homes to multi-unit developments.
Sustainable design
Our firm specializes in environmentally responsible buildings that meet LEED and Passive House standards. We integrate renewable energy systems, low-carbon materials, and climate-responsive design principles to create net-zero ready structures across residential and commercial sectors.
Commercial renovations
We transform existing commercial spaces into modern, functional environments while maintaining structural integrity. Our approach preserves historical elements while upgrading energy systems and optimizing layouts for contemporary business needs.
Accessory dwelling units
We design and implement ADUs that expand urban housing options while respecting neighborhood character. Our pre-approved Seattle plans streamline permitting processes for detached and attached secondary dwellings on existing residential lots.
Community spaces
We create gathering spaces that foster social interaction and community development. Our projects include cultural centers, educational facilities, and mixed-use spaces designed to serve diverse populations and enhance public engagement.
People
Stefan Hampden
Principal
Stefan leads design teams with expertise in Pacific Northwest architecture, focusing on community-driven projects that blend functionality with environmental stewardship.
Matt Hutchins
Principal
Certified Passive House Designer specializing in sustainable urban housing solutions and policy advocacy for middle-density development across Washington State.
Rebecca Wilcox
Director of Sustainability
LEED AP professional guiding eco-conscious design strategies and carbon-neutral building practices in both residential and commercial projects.
Forrest Murphy
Principal
Marketing director and design strategist with focus on community engagement and innovative housing models that address urban affordability challenges.
Elin Headrick
Marketing Director
CPSM-certified professional managing firm communications and promoting sustainable design principles through public outreach initiatives.
Questions
What architectural styles does CAST specialize in?
We focus on modern, sustainable designs that respond to Pacific Northwest environments while incorporating traditional craft elements in renovations.
Do you work on historic building renovations?
Yes, we specialize in preserving historic structures while implementing modern updates and energy-efficient systems for improved functionality.
What sustainable building certifications do you handle?
Our team works with LEED standards, Passive House principles, and AIA 2030 Commitment guidelines for carbon-neutral building practices.
Can you design accessory dwelling units in Seattle?
We offer pre-approved ADU plans and expertise in Seattle's backyard cottage regulations to streamline the permitting process.
Do you work outside the Seattle area?
We complete projects throughout Washington State including Spokane, Methow Valley, and coastal communities.
What community-focused projects have you completed?
Our portfolio includes affordable housing developments, early learning centers, and public spaces designed to enhance community interaction.
