On average, listings lease in the $10's per square foot per year. The Montgomery region is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 8% decline in rent.
In the last 90 days, 67 listings have come on the market, so you'll want to check back regularly for new listings. About 3% of the available leases 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,620 sqft. Most buildings in this market are close to 1 floors. Most buildings in this area were built in 1979 and are Class B.