This document summarizes an analysis of property tax assessments for 136 office buildings in Calgary's Beltline area from 2008-2015. It finds that from 2014-2015: - Assessments for AA, A, B, and C office classes increased 27.6% on average, with the largest increase being 46% for AA class buildings. - Individual building class tax increases ranged from 11.5% for B class to 46% for AA class. - The total non-residential assessment base grew 7% city-wide, compared to a 27.7% increase for Beltline office properties.