Most listings are in the $20's per square foot per year. The Bel Air South submarket is going through a a boost in rates. In the last 3 months, the median rate went up $24 per sqft per year.
Compared to the rest of the Greater Baltimore market, the Bel Air South region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 1 listings have been made available, which means listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 300% of the available leases in the Bel Air South are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 buildings in this region are approximately 2 stories. Most buildings in this region were built in 1991 and are Class B.