Most listings are in the $120's per square foot per year. The Frederick County submarket is going through a an increase in rates. In the last 3 months, the median rate increased $127 per sqft per year.
In the last 90 days, 4 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 825% of the available space in the Frederick County 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 1,800 sqft. Most buildings in this region are close to 1 floors. Most buildings in this market were built in 1994 and are Class B.