Ground was broken in Anacostia Saturday for a 126-unit development of three-and four-bedroom townhouses designated for low- and middle-income families to buy.

The 6.5-acre site, to be called Wilburn Mews, is bounded by Savannah and 4th streets and Martin Luther King Jr. Avenue SE, on one part of what is known as the Wilburn Tract.

The land will be developed in two phases, with completion of Phase I scheduled next spring. The city will buy 30 of the 50 Phase I units, which will be sold for an average of $44,000 with a mortgage rate of four percent in some cases, depending on the purchaser's income.

The remaining 20 homes will be sold privately for an average price of $55,875. Some of the Phase I homes should be completed by this fall, a spokeswoman for the D.C. Department of Housing said.

The city also has an option on 20 of the Phase II units, whose size and completion date have not yet been determined.

Federal low-interest mortgage money, along with $250,000 for downpayments from the Home Purchase Assistance Program, will be available for those who qualify as buyers of one of the 30 four-bedroom Phase I units. The maximum annual adjusted income for a family of four wishing to purchase one of the units is $23,000.

Down payment assistance funds will be disbursed by the D.C. Development Corporation.

The DCHD is discussing the possibility of constructing additional homes on the remaining 5.75 acres of the Wilburn Tract and on an additional 7.1-acre site called the Wilburn annex. Negotiations with the owner, Wilburn Development Company, Inc., are incomplete.

Persons wishing to buy one of the Wilburn Mews townhouses may submit an application to the Far Southeast Community Organization, 2041 Martin Luther King Jr. Ave. SE, between 9 a.m. and 4 p.m. Monday through Friday until May 16. An appointment is required and may be made by calling 678-9003.