Most listings are in the $10's per square foot per year. The Montgomery region is seeing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 7% decline in rent.
In the last 90 days, 90 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the listings in the Montgomery 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,840 sqft. Most buildings in this market are around 2 floors. Most buildings in this area were built in 1979 and are Class B.