The typical asking rate per listing is in the $20's per square foot per year. The Montgomery County region is going through a an increase in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 6% increase in rent.
In the last 90 days, 155 listings have been made available, so you'll want to check back regularly for new listings. About 2% of the available space in the Montgomery County are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,830 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are approximately 2 floors. Most buildings in this region were built in 1982 and are Class B.