A 48-unit apartment building at 220 C St. SE has been sold for $750,000 to Charles L. Pray, who plans to remodel the units for short-term rentals. Ronald Chancellor and Stanley Marks of Shannon & Luchs made the sale for Northern Virginia Futures, Inc.

William M. Karas has been promoted to vice president of the Edmund J. Flynn Co., Inc., after being a top-producing salesman with the firm at Sumner Village.

The 24-acre former Boise-Cascade industrial property at the Beltway and Backlick Road in Springfield, Va., is on the market for $3 million. Nathan R. Isikoff, senior vice president of Carey Winston Co., agent, said the tract has 150,000 square feet of industrial buildings served by rail. It is zoned for heavy industrial use.

The annual joint meeting of the Mortgage Bankers Association in metropolitan Washington and the Maryland chapter will be held Wednesday afternoon at the Kittamaqundi room of the Rouse co. building at Columbia, Md.

The Bethesda office of Routh Robbins Realtors has formed a special sales force of persons who have the ability to speak several languages, including French, Spanish, Russian, Polish and Romanian.

Town & Country Properties reported sales in February of 503 homes for a total of $33.5 million. President E. A. Baker Jr. said it was a record for that month.

Barnes, Morris & Pardoe arranged $900,000 in secondary financing for the office building at 2033 K St. NW owned by Quadrangle Development Corp.

Donald L. Ward has joined Walker & Dunlop as vice president of the firm's Richmond office. He will be in charge of government programs in mortgage lending.

Kathleen M. Ferguson has been named an assistant vice president of the Carey Winston Co. in the residential mortgage loan department in Northern Virginia.

The American Israel Public Affairs Committee has leased 5,846 square feet at 444 N. Capitol St. NW, according to the Julien J. Studley leasing office. Braedon is the leasing agent for the Capitol Hill building owned by Marine Engineers.

A non-credit seminar on "buying and selling your home" will be given Saturday, April 23, on the Loudoun campus of Northern Virginia Community College. For information, call 323-4551.

Richard E. Smith, president of Century 21-Regent Realty, has earned the Certified Residential Broker designation of the National Marketing Institute of the National Association of Realtors.

The Ryland Group, which builds at varied locations in this area, has opened new semi-detached models at Heather Ridge in Frederick County, Md., where Charles Tuchfarber is the manager. Prices are in the $30,000s.

M. Ronald Lipman, formerly a principal in the firm of McCurdy-Lipman and Associates in Baltimore, has formed the firm of Lipman, Frizzell & Mitchell, which will specialize in real estate appraising, counselling and market research in Maryland and neighboring states. The office is in Towson, Md.