The District of Columbia Builders Association has elected Philip R. Miller of MDC Land Inc. its president for 1983. Miller's firm specializes in new construction and renovation of residential properties and in institutional construction, particularly health care facilities. Elected with him were Theodore R. Hagans Jr., first vice president; William N. Cafritz, second vice president; Lisle T. Lipscomb Sr., secretary; and Frank Calcara, treasurer . . . Michael Sumichrast has been promoted to senior staff vice president and chief economist of the National Association of Home Builders . . . The George Hyman Construction Co. has named two new vice presidents: Patrick J. Kenny and Roger J. Merriman. Kenny, who joined Hyman in 1981 as controller, will be the firm's chief financial officer. Merriman, who has been with the company since 1980, is in charge of the contruction of the Defense Intelligence Agency's Defense Intelligence Analysis Center, a 48-acre, 860,000-square-foot facility at Bolling Air Force Base . . . The National Corporation for Housing Partnerships likewise has two new vice presidents. They are Kenneth H. Becker, who has become VP for development, and Raymond R. Wojcik, who is now VP for property management. The NCHP is the nation's largest private producer and manager of housing for low- and moderate-income people . . . Edward L. Stout, president of Acme Brick Co. of Fort Worth, the largest brick producer in the United States, is the new chairman of the board of the Brick Institute of America. The institute has its offices in McLean . . .