The Northern Virginia Board of Realtors will sponsor a public seminar on consumer protection for homeowners Thursday morning at the Elks Club at 8421 Arlington Blvd., Fairfax. Topics will include Fairfax County legislation for home buyers, the implied warranty law in Virginia, homeowner warranty programs and home inspections. Information is available from the board, 560-7350.

The real property committee of the D.C. Bar Association will hold a seminar on rent control the evening of Sept. 26 at the American Red Cross auditorium at 2025 E St. NW. Registration fee is $10. For information, call 223-1480.

Robert and Louise Slaby are developing a 56,000-square-foot office park condominium building at Rtes. 450 and 197 in Bowie. Maryland National Bank is providing construction financing for the building. College Park Contractors Inc. has the general contract.

The Artery Organization Inc. has opened its Greenrun at Woodstream town house development on Good Luck Road in the Greenbelt area. The colonial-style houses are priced from the mid-$60,000s. Artery also has opened a 193-unit town house comunity, Country Creek, on Sutton Road in the Vienna area. Prices begin in the $80,000s.

A series of workshops on winterizing houses begins today in Anacostia under the sponsorship of the Neighborhood Housing Services. The first session, on conservation and home insulation will be held today at 10 a.m. at the Anacostia Energy Alliance, 2027 Martin Luther King Ave. SE. Other workshops will be held tomorrow and Sept. 15. The fee is $8. For information, call 889-7932.

The National Leadership Conference on Urban Lending will hold sessions on the role of lending on neighborhood revitalization processes. Sessions will be held Sept. 16-18 at several locations here. For information, call 232-8744.