Most listings are in the $20's per square foot per year. The Annapolis region is seeing a decrease in rates. In the last 3 months, the median rate decreased $7 per sqft per year. That's a 22% decrease in rent.
Compared to the rest of the Greater Baltimore market, the Annapolis submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 21 listings have been listed, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 5% of the listings in the Annapolis are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,180 sqft. Most buildings in this market are around 2 floors. Most buildings in this area were built in 1979 and are Class B.