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Terence L. Thornhill, Architect is a talented, award-winning, Washington State architectural firm, located in the Tri-Cities, engaged in the pursuit of design excellence.  Our outstanding design capabilities are evidenced by our broad knowledge in diverse projects including design and masterplanning of commercial offices, retail facilities, wineries, medical laboratories, physician offices, law offices, interpretive centers, schools, churches, municipal facilities, hospitality facilities, residential remodels and home improvements, custom residences and spec homes, multi-family residences, and much more. 

Terence L Thornhill, Architect, Inc. P.S. prides itself as a design oriented firm specializing in excellence of functionality and aesthetics with a definitive focus on project schedule and the budgetary bottom line.  We are dedicated to providing exemplary customer service and professionalism, and benefit from positive references of our many satisfied customers. 

Terence L Thornhill, Architect has a diverse client base and was recently awarded the design contract for the Hanford Reach Interpretive Center, is applying the finishing touches for a new showroom for McCurley Integrity Chevrolet and is designing several new office buildings, restaurants and church expansion projects.