Arlington’s 2012 real estate assessments are up 6.6% overall, continuing last year’s recovery. The commercial sector, including office and apartment properties, showed particular strength, gaining 13.5%. Single-family residential values showed modest growth. Existing properties — including detached homes, condominiums and townhouses — increased 1.8%, from an average value of $510,200 to $519,400.http://news.arlingtonva.us/pr/ava/arlington-property-values-up-6-222795.aspx