The typical asking rate per listing is in the $30's per square foot per year. The Bryn Mawr submarket is experiencing a a rise in rates. In the last 3 months, the median rate went up $38 per sqft per year.
In the last 90 days, 3 listings have been listed, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,410 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this area were built in 1964 and are Class B.