Look for a summer start on a new office building on the site of what now is a parking lot at 1717 DeSales St. NW, just north of the Mayflower. The 100,000 square - foot structure will be developed by Melvin and Edward Lenkin with the Taishoff (Broadcasting magazine) family. Edward Lenkin, 28, whose father heads a construction firm, will be project manager. The Vlastimil Koubek office is designing the eight - story structure. Commercial rents will likely average $20 a square foot and office space $12 to $14 a square foot.

Look for a British builder to make a marketing test with 11 Georgian - styled single house in Burke Center in Fair - Fax County. William B. Regan, head of Globe USA Inc., heads the operation. It is a wholly owned subsidiary of Globe Construction Co. Ltd., which was incorporated in 1962 in London. He said the firm has been building about 500 houses a year in the quadrant of England southesst of London. If area buyers cotton to the globe houses, Regan, who has moved his family to Northern Virginia, says that he will build more, along with some lower priced Georgian town houses. He added that the fast flights via the Concorde enable him to be active in both areas.