A new affirmative marketing agreement between the Department of Housing and Urban Development and the Northern Virginia Board of Realtors will be the topic of discussion at the annual membership meeting of Northern Virginia Fair Housing, Inc., at 8 p.m. Monay atSt. Albans Episcopal Church, 6800 Columbia Pike, Annandale. Chester McGuire, assistant secretary of HUD for fair housing and equal opportunity, will speak.

The Washington Area Construction Industry Task Force will hold hearings Thursday and again June 3 and 9 on problems faced by minority group construction workers in the building trades. The hearings will be held from 10 a.m. to noon at the United Planning Organization, 1021 14th St. NW.

The Maryland division of Pulte Home Corp. has opened a subdivision of new split-level and two-story houses, priced in the mid-$40,000s, in Federick, Md. Called Stonegate, the houses hav three bedrooms and country-style kitchens, according to Royl Krag, president of the Pute division. He also said that Pulte has purchased 150 town house lots in the Clopper Road area of Gaithersburg.

Harry B. Zackrison, who heads the electrical engineering department of Chatelain, Samperton & Careasterra, has been given the National Capital award for professional achievement for engineers by the D.C. Council of Engineering and Architectural Societies.

The convention of the National Apartment Association beings Monday in Las Vegas. One of the principal speakers will be Irving Kriegsfeld of Management Partnerships, Inc., of Washington.

The first directory listing more than 300 minority architectural and engineering firms has been published by the American Consulting Engineers Council of the American Institute of Architects. For information, Call 296-1780.