The Suburban Maryland Home Builders Association has named David Apple technical director to serve groups in Calvert, Charles, Prince George's and St. Mary's counties. The association has also appointed George D. Hazzard as its technical director in Montgomery County and as liason with the Washington Suburban Sanitary Commission.

Ronald R. Rumbaugh, 44, has been chosen to succeed David E. Stahl as executive vice president of the Urban Land Institute. He was formerly chief executive officer of the American Chamber of Commerce Executives. Both groups are non-profit organizations. Stahl left ULI, a research and educational organization aimed at improving land use planning and development to become executive vice president of the National Association of Home Builders.

Century 21/Chateau Realty, Inc., headed by John E. Ellis, has expanded its offices into new quarters in the Vienna Plaza Shopping Center, where the Century 21 Value Vista Show of Homes is on display.

Eugene F. Doerfler, real estate manager of Giant Food, Inc., will be one of the speakers at the convention of the National Association of Corporate Real Estate Executives that begins March 5 in New Orleans.

The Community Associations Institute, based here, will sponsor its third annual conference on community associations, beginning March 27, at the Continental Plaza in Chicago. For information, call 223-6770.

A two-day workshop on the new rural housing-rental assistance program will be held here March 14 and 15 by the National Center for Housing management at the Quality Inn on Thomas Circle NW. For information, call 672-1717.

Two leased industrial buildings on Parklawn Drive in Rockville were sole recently by Cohen-Meisel Associates to Dr. B. Terimourian for $925,000. Howard Rubin of Robert H. Kent & Co., Inc., handled the negotiations.

Kenneth Geremia, who had been director of special projects for the National Association of Home Builders, ahd been promoted to director of public relations.

As a member of RELO/Inter-City Relocation Service, Shannon & Luchs now is handling transfer-related problems for employees shifted from city to city. Included is a guanranteed sales price for a home being vacated due to the move.

The Alexandria Adult Distributive Education Service and the Northen Virginia Board of Realtors are offering a course in real estate advance planning. For information, call 549-8340.

The Real Estate Securities & Syndication Institute of the National Association of Realtors will sponsor a four-day course on three phases of syndication. Sessions will be held March 8-11 at the Ramada Inn at Lanham. For information, call 466-5220.

The 33,000-member Maryland Classified Employees Association has announced plans to build a new head-quarters building in the Security Industrial Park, near exit 17 of the Baltimore Beltway.

George M. Brady, president of the National Corporation for Housing Partnerships will be speak to the American University chapter of Rho Epsilon professional real estate fraternity at the campus. He will talk about the role of equity purchases and joint ventures in new housing.

The area chapter of Lambda Alpha a fraternity dedicated to the study of land economics, will meet March 8 at the Touchdown Club, where Lorenzo Jacobs, director of the department of housing and community development in the District, will discuss homesteading.

Better Homes Realty, Inc., has named John Thomas as director of its new corporate relocation department, which seeks to aid corporations and other organizations to move employees into this area.