The District of Columbia Bar will sponsor a seminar on housing ownership, with emphasis on condominiums and cooperatives in the Distict, Saturday, May 13, at the Marie Reed Community Learning Center, 18th and California streets NW. For information, call 638-1509.

Insulation, energy conservation, roofing, yard care and other topics will be covered in free home improvement courses to be given May 17 by the Montgomery County Office of Consumer Affairs in the county's center at 8728 Colesville Rd., Silver Spring. To register, call 340-1010.

Sen. Richard Lugar (R-Ind.) will be the keynote speaker during the national convention of the American Institute of Architects in Dallas May 22.

Richard O'Neill, former editor of House & Home magazine and now a housing consultant in New York City, will be the speaker when the Suburban Maryland Home Builders Association meets at the Bethesda Holiday Inn May 18. The Calvert, St. Charles and St. Mary's tri-county section of SMHBA will meet Tuesday at the Hawthorne County Club in LaPlata, where space heating will be the topic.

Area chapters of the National Association of Home Builders will present the annual "finest for family living" awards to area builders and developers Tuesday evening at the National Housing Center.

The written examinations for the real estate brokers and salesperson in the District will be held Tuesday, May 23, at the harambee House Hotel, 2225 Georgia Ave. NW., beginning a 8:30 a.m.

A condominium management seminar will he held May 18 at the National 4-H Center, 7100 Connecticut Ave., Chevy Chase. Sponsors are the Apartment and Office Building Owners Association, the Community Associations Institute and the Institute ofReal Estate Management.