The typical asking rate per listing is in the $20's per square foot per year. The St. Mary's County region is going through a decrease in rates. In the last 3 months, the median rate decreased $8 per sqft per year. That's a 24% decline in rent.
In the last 90 days, 0 listings have been posted online, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About NaN% of the office spaces in the St. Mary's County are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,550 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are approximately 2 stories. Most buildings in this area were built in 1974 and are Class A.