The typical asking rate per listing is in the $20's per square foot per year. The Bel Air South region is going through a a boost in rates. In the last 3 months, the median rate increased $24 per sqft per year.
Compared to the rest of the Greater Baltimore market, the Bel Air South submarket has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 1 listings have come on the market, which means new availabilities 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,840 sqft. Most properties in this region are approximately 2 floors. Most buildings in this area were built in 1991 and are Class B.