Gaither's Town Plaza, a year-old, 70,000-square foot shopping center on Rte. 355 near Montgomery Village, was sold recently for $5 million to Wingham Co. Inc., a pension-financial firm in Holland. The Savage-Fogarty Companies Inc. represents the purchaser of the fully leased, 32-store complex. Prince George's Properties Inc. represented John Lampin, the seller.

Lawrence N. Brandt Inc., which recently said out the its Beekman Place condominium complex, has quietly opened a sales office on New Mexico Avenue NW for a town house development there. It is on a portion of the Glover tract near the Fox-hall and the Towers. Brandt said that the first group of 76 Sutton town houses he is building is sold out at prices averaging $80 a square foot, about 25 percent higher than at Beekman. About 200 town houses are planned on the site, which will include a high-rise rental apartment and a three-story office building. Rents at the Sutton high-rise will range from $800 to $2,000 a month.

Leonard A. Greenberg, who will not be 30 until next January, said this week that his company has a contract to purchase 15,782 square feet of ground (now a parking lot) at the southeast corner of 13th and N streets NW. He is buying the ground from Ward Stone Realty Inc. of New York for approximately $400,000. After a scheduled settlement in January, Greenberg said he plans a 112-unit condominium town house development on the tract. It is near the Iowa apartment site being redeveloped by David Clark who converted the Fairfax Village condominium complex in Southeast.