The typical asking rate per listing is in the $10's per square foot per year. The Eldersburg submarket is going through a a boost in rates. In the last 3 months, the median rate went up $16 per sqft per year.
Compared to the rest of the Greater Baltimore market, the Eldersburg submarket has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 4 listings have been made available, which means spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 100% of the listings in the Eldersburg 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,250 sqft. Most buildings in this area are close to 1 stories. Most buildings in this market were built in 1996 and are Class B.