Most listings are in the $20's per square foot per year. The Montgomery County submarket is going through a a boost in rates. In the last 3 months, the median rate rose $26 per sqft per year.
In the last 90 days, 133 listings have been made available, so you'll want to check back regularly for new listings. About 43% of the office spaces in the Montgomery County 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,250 sqft. Most properties in this region are around 2 floors. Most buildings in this region were built in 2002 and are Class B.