The two residential real estate brokerages that regularly crack the list of top 10 largest D.C.-area based private companies have proven themselves once again to be masters of the really big deal.
TTR Sotheby’s International Realty and Washington Fine Properties have played a role in 23 of the 26 biggest single-family property sales in the D.C. area so far this year, according to data provided by BrightMLS, the listing service, and public records compiled by the Washington Business Journal. Members…