IN THE BUSINESS . . . The Federal Home Loan Mortgage Corp. is going to begin buying non-owner-occupied mortgages under its standard and guarantor programs. The program, which starts next month, will include purchase money loans up to 90 percent on investment and seasonal property and refinanced loans up to 80 percent of the value of the property . . . The Carley Capital Group has been chosen by the city of Baltimore to convert the former B & O Tobacco Warehouse at the top of Fells Point into 204 condominium or rental units and a 40-to-50-room "urban inn." Carley, which has major offices here and Madison, Wis., will invest $30 million, including a $3.2 million payment from the city. The project will include a marina of about 250 ships and a small restaurant . . . The Montgomery County Board of Realtors will present two seminars Wednesday at the Ramada Inn in Rockville. The first is a "financial update" dealing with FHA, VA, Fannie Mae, Freddie Mac and the private secondary mortgage market; the second is on the effects of the new D.C. real estate licensure law on Maryland licensees. For information, call 933-3200 . . . And the National Society of Professional Resident Managers will sponsor an all-day legislative seminar May 11 at the Ramada in Lanham. On the panel will be representatives of local regulatory agencies, Realtor groups, and apartment and office building owners. For information, call 585-4030.

PERSONNEL NOTES . . . Robert D. Zimet has joined Charles E. Smith Management, Inc., as senior vice president and general counsel. He comes to the firm from the Howard Johnson Co. John H. Hayden Jr. has joined the Oliver T. Carr Co. as retail leasing specialist . . . William J. Hennessy, a sales agent with Shannon & Luchs' New Hampshire Avenue office, has been inducted into the Prince George's Board of Realtors' Hall of Fame. He is the 10th person in the board's 50-year history to receive this honor . . . Hines Industrial has named Robert F. Dolan vice president to supervise the firm's Washington office . . . Diane Yochelson has joined the leasing department of Julien J. Studley's Washington office . . . Nerina Gilbert Evans has been named director of property management for M. B. Kirn Real Estate Associates, Inc., of Arlington . . . Winchester Homes, of Greenbelt, announces that James R. Graves has joined the firm as director of sales and marketing, and that Peter G. Byrnes has been promoted to vice president of finance . . . Angela Efantis has been promoted to manager of Hugh T. Peck Properties' Bethesda office.

ON THE MOVE . . . The American Physical Therapy Association has bought Building 4 in TransPotomac Plaza on the Alexandria waterfront for its headquarters. The association will move from its current location in downtown Washington this summer. The new building has 35,000 square feet, and the association has a staff of 75. Clark & Sampson acted as consultants to the association; Leggat McCall & Werner Co. is TransPotomac's exclusive leasing agent . . . Sharon Lou Limited Partnership has bought the 22-unit, eight-building Bonnie View Apartments on Ronald Road in Capitol Heights. The seller was Chelly Associates and the price $2.2 million.