Compared to the rest of the Greater Baltimore market, the Ellicott City region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 12 listings have been posted online, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 25% of the available leases in the Ellicott City are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,000 sqft. Most buildings in this region are around 2 stories. Most buildings in this market were built in 1987 and are Class B.