Most listings are in the $20's per square foot per year. The Warrenton region is seeing a a rise in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Washington D.C. market, the Warrenton region has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 3 listings have been posted online, which means office spaces might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 33% of the available leases in the Warrenton are subleases, so you might be able to snag a great spot on a short term. 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 1,340 sqft. Most properties in this area are close to 3 floors. Most buildings in this area were built in 1991 and are Class A.