Compared to the rest of the Washington D.C. market, the Wheaton submarket has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 0 listings have been listed, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About Inf% of the available space in the Wheaton are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,500 sqft. Most properties in this market are around 1 stories. Most buildings in this market were built in 1986 and are Class B.