George W. Peavy Hall is a pioneer mass timber building at Oregon State University showcasing innovative forest products and novel engineering solutions. Data on the performance of those products and solutions are currently collected from a comprehensive sensor network in the building and investigated to cross-check assumptions made during the design phase. These data are also used to see whether any deviation from the original assumption occurs during the building service life. As such, Peavy Hall is truly a living laboratory, and the monitoring data will provide many lessons for students, researchers and the mass timber industry.