The typical asking rate per listing is in the $10's per square foot per year. The Frederick County region is going through a a boost in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 13% increase in rent.
In the last 90 days, 7 listings have been listed, which means 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 posted, so finding a space for a small business might be tough.
Even though the median size is 4,000 sqft, there are still 0 listings below 2,000 sqft. Most properties in this market are close to 1 floors. Most buildings in this area were built in 2000 and are Class A.