The Department of Housing and Urban Development will sponsor a three-day conference on fair housing programs and equal opportunity starting next Wednesday at the Ramada Inn in Rosslyn. More than 400 representatives of federal and local governments and civil rights groups will discuss the role of volunteerism in civil rights enforcement.

Benjamin Franklin Kahn, president of the trustees of the Washington Real Estate Investment Trust, was given the Joseph Wharton award by the Wharton School Club of Washington at a dinner held here this week. A graduate of the Wharton School of Business of the University of Pennsylvania in 1946, Kahn has been a regular guest lecturer at Wharton since his graduation.

Century 21 Singleton Realtors has moved into larger offices at 815 W. Broad St., Falls Church. Louise M. Singleton, who opened the firm with her late husband, Jimmie H. Singleton in 1963, is the president of the firm, which includes a son, J.E. (Win) Singleton as sales manager, and another son, Jimmie Singleton, Jr., as a newly licensed salesman.

Nine independently owned and operated real estate companies in suburban Maryland have formed an association, Group One Real Estate, Inc., to compete with larger real estate firms and nationally franchised operations. The founding companies in Group One include Alleman Associates, Inc., Marvin L. Horsley, Inc., Harold G. Katz, Inc., Keller Associates, Inc., Key Properties realty, Inc., Robert F. Montgomery, Inc., Ronald A. Newman Co., Inc., Woodside Realty Co. and Yeager Miller Realty, Inc.

James G. Martin, a member of the board of directors of the Kennedy Bank and Trust Co. of Bethesda, has been elected to a vice presidency of the bank with non-administrative duties. martin is executive vice president of the James C. Conley Co., a Silver Spring real estate and development firm . . . Virgle Kenneth deal has been named Realtor Associate of the Year by the Prince George's County Board of Realtors. A licensed agent for seven years, he lives in Friendly, Md.

Eastern International of Virginia Beach, Va., has announced plans to build a 104,00-square-foot office and light industrial building at the Busch Corporate Center in Williamsburg. Construction of the $2 million structure will begin in June.

The Ocean City (Md.) Council of Condominiums, Inc., will meet at 10 a.m. Sunday in the Sheraton-Fountaine-bleau Hotel to discuss issues of interest to all condominium owners at the oceanfront resort.

Geraldine G. Wilson has been named director of the Design Collaborative, an interior design firm in the Old Town area of Alexandria. The Design Collaborative is an affiliate of the VVKR Partnership, an architectural, engineering and planning firm in Alexandria.

The Braedon Companies has been named exclusive leasing agent for the office building that developer Robert Wolpe and partners plan to build at 1140 19th St. NW. The building will have approximately 62,000 square feet of space and facilities for squash and handball-playing. Occupancy is scheduled for the spring of 1979.

Dr. Saul Klaman has been elected president of the National Association of Mutual Saving Banks, succeding Dr. Grover Ensley, who retired, Klaman, widely known in national housing circles, has been serving as executive vice president and chief economist of the trade association based in New York City.

A computerized security system is expected to be operating in September in the new community of St. Charles in Charles Conty, Md. The system, designed to provide protection for individual dwellings, will cost each home owner $600 for installation and a monthly service fee of $12 Participation is voluntary.

Elizabeth Larson has been named manager of recruiting programs for Routh Robbins Realtors. A veteran of nine years in real estate selling, Larson is a member of the Northern Virginia Board of Realtors Million Dollar Sales Club.

Stanley E. Benefield, Sr., who formerly headed his own office in Prince George's County, has joined Long & Foster Real Estate, Inc., as an associate broker at the firm's office in Camp Springs.

A series of varied courses in real estate is being offered by the Arlington Distributive Education Serice and the Northern Virginia Board of Realtors. For information, call 558-2581.

A house in Orange Hunt Estates recently became the 4,000th dwelling to be enrolled under the Home Owners Warrantly program of the Home Owners Registration Corp. of Northern Virginia. Orange Hunt Estates is a development of more than 1,000 dwellings developed and built in the Pohick watershed area by Murray Weinberg, Clarence D. Smith, Jr., and Herman Yanovich since 1966.