Most listings are in the $20's per square foot per year. The Warrenton region is going through a a rise in rates. In the last 3 months, the median rate rose $25 per sqft per year.
Compared to the rest of the Washington D.C. market, the Warrenton submarket has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 1 listings have been posted online, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,000 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this region are approximately 3 floors. Most buildings in this region were built in 1999 and are Class A.