On average, listings lease in the $20's per square foot per year. The Newington submarket is going through a an increase in rates. In the last 3 months, the median rate went up $20 per sqft per year.
Compared to the rest of the Washington D.C. market, the Newington submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 7 listings have been made available, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 16,190 sqft, there are still 0 listings below 2,000 sqft. Most properties in this market are close to 1 floors. Most buildings in this region were built in 1982 and are Class B.