The typical asking rate per listing is in the $30's per square foot per year. The Fairfax County region is seeing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 2% decline in rent.
In the last 90 days, 31 listings have come on the market, which means leases might be going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,150 sqft. Most properties in this area are close to 3 stories. Most buildings in this region were built in 1985 and are Class B.