Most listings are in the $10's per square foot per year. The Frederick County region is going through a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 13% rise in rent.
In the last 90 days, 7 listings have come on the market, which means office spaces 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.
Even though the median size is 4,000 sqft, there are still 0 leases below 2,000 sqft. Most properties in this region are approximately 1 floors. Most buildings in this area were built in 2000 and are Class A.