TCA Architecture + Planning + Design | 561 followers on LinkedIn. A Seattle-based architecture firm known for its award-winning municipal, commercial and high-end residential designs. | TCA represents a 60+ year evolution of experience providing personalized design services for a wide range of challenging and notable projects. Our award-winning firm has an established reputation for excellence in residential, commercial, municipal, fire service, and interiors projects. TCA has provided specialty fire facility design and consulting nationwide.