In the last 90 days, 3 listings have come on the market, which means listings 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 350 sqft. Most properties in this market are around 2 stories. Most buildings in this region were built in 1890 and are Class B.