In 2011 the most expensive Back Bay condo that sold on a price per square foot basis was 45-47 Commonwealth Avenue # 5. The sales price was $1,799.00 per sq ft.

The least expensive Back Bay condo sale in 2011 on a price per square foot basis was 171 Marlborough Street #1. The sales price per square foot was $556.00

The average sales price per square for a Back Bay condo $804.00 based on sales from January 1, 2011 – March 7, 2011.