Cornerstone hero mockup
Aerial view of the Mabry residence, a Seattle home with gray board and batten siding above an exposed brick lower level.

Seattle based, projects statewide and beyond

Cornerstone
Architectural Group

Schools, civic and commercial buildings, and homes across Seattle, the Pacific Northwest and beyond. Drawn and inspected by the same team from first sketch to final walkthrough.

Cornerstone areas of work

Cornerstone core values

What we stand for

Our core values

Our work Featured projects

Our Commitment

Building for the Planet

Sustainability is not a checkbox. It is embedded in every decision we make from site selection to material sourcing.

Energy efficient building

01 / Performance

Energy Efficiency

From envelope optimization and passive solar orientation to high-performance mechanical systems, we engineer buildings that consume less without compromising comfort. Every project includes an energy model to verify performance targets before construction.

Energy Modeling
Solar panel integration

02 / Renewables

Solar Integration

We integrate photovoltaic systems from the earliest design stages, not as afterthoughts. Roof orientation, shading analysis, and structural planning are all coordinated to maximize generation and enable seamless installation for both new builds and retrofits.

PV + Storage Ready
Salmon Safe certified project

03 / Certification

Salmon Safe

Salmon Safe certification recognizes our commitment to protecting Pacific salmon habitat through responsible stormwater management, reduced pesticide use, and site designs that preserve the health of local watersheds from the ground up.

Watershed Stewardship
Green roofing system

04 / Envelope

Green Roofing

Green roofs reduce stormwater runoff, lower urban heat island effect, and extend membrane lifespan. We design both extensive and intensive systems tailored to structural loads, climate zone, and long-term maintenance requirements.

Extensive + Intensive
Sustainable materials

05 / Materials

Sustainable Materials

We specify materials based on embodied carbon, recycled content, regional sourcing, and end-of-life recyclability. Our specification process prioritizes transparency through EPDs, ensuring clients understand the full environmental footprint of what goes into their building.

EPD Verified