The typical asking rate per listing is in the $20's per square foot per year. The Manassas region is seeing a decrease in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 8% decrease in rent.
Compared to the rest of the Washington D.C. market, the Manassas region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 30 listings have been listed, which means listings might be leasing quickly. You'll want to be prepared to make an offer immediately. About 7% of the available leases in the Manassas 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 2,080 sqft. Most properties in this area are close to 2 floors. Most buildings in this region were built in 1988 and are Class B.