Highline Transportation Center

Our Core Values

Client centered architecture

Active participation in the promotion of geographic and cultural responsive design

Gratitude to all clients and all projects, whether big or small.

Featured Projects

Granite Falls Fire Station 87

Northshore Senior Center

Birnam Wood Phase 3

At Cornerstone, our culture thrives on teamwork and innovation. Every project reflects our shared commitment to sustainability, quality, and lasting design.

Sustainability at Cornerstone

At Cornerstone, sustainability is at the core of every design decision we make. Our mission is to create high-performance environments that minimize environmental impact while maximizing efficiency, comfort, and longevity. Through a commitment to energy-efficient design, responsible material selection, and carbon-conscious construction, we aim to build spaces that serve both people and the planet.

Our approach integrates solar technology, green roofing systems, and envelope optimization to reduce operational energy demand and extend building life cycles. From concept through construction, we prioritize designs that respond to the local climate, leverage renewable energy, and promote long-term resilience.

By embedding sustainable practices into every phase of our projects, Cornerstone continues to advance architecture that not only performs — but endures responsibly.

Under Construction

Please be patient while we are under construction.
Please feel free to reach out to us at (206) 682 -5000 or email us at info@cornerstonearch.com