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Terence L. Thornhill, Architect is an award-winning, creative and budget conscious architectural firm, located in the Tri-Cities, engaged in the pursuit of design excellence and client satisfaction. Our outstanding design capabilities are evidenced by our broad knowledge in diverse projects including design and master planning 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 clients. 


Terence L Thornhill, Architect has a diverse client base which include but is not limited to the Hanford Reach Interpretive Center, LU LU Craft Bar + Kitchen, Estate at Destiny's Ridge and our tiny house has been featured on HGTV's "Tiny House, Big Living" both owned by Alexandria Nicole Cellars, and much more. A few of our more recently completed projects include the Road 90 Business Park Development in Pasco, WA, TriCU Credit Union in Kennewick, WA, C3 Remodel and Expansion in Richland, WA, and Port of Kennewick Columbia Gardens Urban Wine Village also located in Kennewick, WA. Click on the photos to the left to view more photos of each of these projects.

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