Mount Vernon Realty plans to expand its Virginia operations to include six new offices within the next 90 days. The addition will give the firm 19 locations. The new offices will be located in Sterling, Annandale, Reston, Burke, Stafford and Woodbridge. In addition, the firm announced the appointment of Duke O'Connell as manager of the Tysons Corner office and Mal Searle as manager of the insurance division.

A workshop for do-it-yourself home builders will be held Friday from 7 to 10 p.m. and Saturday from 10 a.m. to 4 p.m. at the Loudoun County campus of the Northern Virginia Community College. The program will feature talks and demonstrations by a contractor, a bank loan officer, an architect, an attorney, a building inspector and lay people who have built their own homes. The cost of the workshop is $15.

James E. Clay, deputy director of the D.C. department of housing and community devlopment, will discuss the city's housing program at a forum to be held next Saturday at 9 a.m. in a social room of the Nativity Catholic Church, 6000 Georgia Ave. NW. Sponsored by the Upper Northwest Group Ministry, the forum also will feature an overview of housing in the District by Lawrence P. Goodwin, president of the D.C. Home Builders Association.

The National Association of Real Estate Brokers Inc. recently adopted a policy statement on the displacement of low and fixed-income families in revitalized urban neighborhoods. The broker group stressed the need for both the private sector and the federal government to provide decent, affordable housing for persons willing to move and also for those choosing to remain where they live.

The Maryland Institute of Home Builders will sponsor its third annual reception for legislators at the Annapolis Yacht club on Thursday from 6 to 9 p.m. Tickets are $75 each and are available from the office of the Suburban Maryland Home Builders in Silver Spring.

Long and Foster Real Estate, Inc. has opened four new residential sales offices, bringing its total number of branches in Maryland and Virginia to 21. The new offices are in Wheaton-Silver Spring, Rockville, Waldorf, Md., and Great Falls, Va.

The District written licensure examination for real estate brokers and salespersons will be held on Feb. 26 at 8:30 a.m. at the Shoreham Americana Hotel, 2500 Calvert St. NW.

Maryland home improvement contractors announced that they raised more than $9,000 through the 1978 cerebral palsy telethon. The Maryland Improvement Contractors Association, which includes contractors and their suppliers, raised the funds by soliciting member firms, subcontractors, employees, suppliers and even their bowling leagues.

Chris Coile, president of a real estate firm serving the Baltimore and Annapolis areas, recently was the featured speaker at a professional real estate meeting in Farmington Hills, Mich.

Dale F. Weller has been named area sales manager for Lawyers Title Insurance Corp. His area includes the District, Maryland and Delaware.

Janice McCord has been named manager of the newly established Arlington office of Shannon & Luchs. The firm plans to open an office in Reston next summer.

The National Corp. for Housing Partnerships has named John L. Norris vice president for equity sales and Thomas Zuniga has been named vice president for urban development. NCHP provides equity capital and joint venutre funds for private construction of housing for low and moderate income families.

Dennis Riordan has been named assistant vice president of the Bethesda-based Artery Organization, which builds apartments and town houses in this area.