On average, listings lease in the $10's per square foot per year. The Towson submarket is seeing a decline in rates. In the last 3 months, the median rate decreased $14 per sqft per year. That's a 47% decrease in rent.
Compared to the rest of the Greater Baltimore market, the Towson region has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 13 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,050 sqft. Most properties in this area are approximately 4 floors. Most buildings in this area were built in 1977 and are Class B.