On average, listings lease in the $20's per square foot per year. The Towson region is going through a decline in rates. In the last 3 months, the median rate fell $5 per sqft per year. That's a 17% decline in rent.
Compared to the rest of the Greater Baltimore market, the Towson submarket has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 36 listings have come on the market, which means new availabilities might be going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,390 sqft. Most buildings in this area are around 5 stories. Most buildings in this market were built in 1977 and are Class B.