The typical asking rate per listing is in the $10's per square foot per year. The Montgomery County submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 7% decline in rent.
In the last 90 days, 113 listings have been listed, so you'll want to check back regularly for new listings. About 4% of the listings in the Montgomery County 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 2,420 sqft. Most properties in this region are around 2 floors. Most buildings in this region were built in 1980 and are Class B.