The downtown YWCA has paid $1.4 million to a group headed by developer Dominick Antonelli for a 13,000-square-foot parking lot at the northeast corner of 9th and G streets NW, across from the Martin Luther King Library. Paula Jeffries, head of YW's building committee, said that a new Y headquarters for the site is being designed by architect Chloethiel Smith. A summer start is planned for the building, which replaces the downtown Y at 17th and K streets NW. That site is under a sales contract to developer John Akridge -- for a record price of about $375 a square foot. Akridge plans to start constructing another office building there in two years.

The new YW building, which is expected to cost nearly $5 million, will have 50,000 square feet of space.

Next summer, builder-developer C.W. (Bud) Gosnell and his wife, Carolyn, will move from their 12-year-old house on Piney Glen Lane in Potomac to one of the Beallmont houses Gosnell and his son Griff have been building near Travilah. The Gosnells are selling their present home to Robert and Leslie Berger.Berger, a partner in the Berger-Berman home building firm, said the Gosnell house was "just what we always wanted, even to the 5-acre site on a knoll." The house is being sold for about $500,000.

A 4 1/2-acre site north of the posh Chatsworth town house development on Oregon Avenue NW opposite Rock Creek Park, has been sold for $1.5 million, according to broker Ted Wresche, who worked with another broker, Joe Olevsky, on the deal. Juan Gruner sold the 20-lot site to developer Bobby Boyd and Dr. John Jackson, who head a group that plans to build houses priced at about $325,000. The first houses are expected to be completed in late summer.