Construction has been started on a $2-million, six-story office building at 301 W. Maple Ave., Vienna, Va., that will feature two-story atriums on the first, third and fifth floors. Kari Kohler and William Daniels are building the structure.

A seminar on the new District rental control law will be held from 9 a.m. to noon Thursday at the Washington Hilton under the sponsorship of the District of Columbia Legislative Reporter.

Information on county subdivison regulations in Maryland and the Interstate Land Sales Act will be featured during the Maryland Farm and Land Institute program Feb. 14 and 15 at the University of Maryland.

The Women's Council of the Prince George's County Board of Realtors will hear attorney-accountant Judy H. Mullen talk about real estate taxation at a breakfast meeting to be held Wednesday morning at the Ramada Inn in Lanham.

John T. Hazel, a zoning attorney and investor, will talk about land use in Fairfax County at the Monday evening meeting of the Executives Club of the Northern Virginia Board of Realtors.It meetings at the Ramada Inn at Tysons Corner.

A seminar on house selling with or without a broker will be held Feb. 25 at the Key Bridge Marriott by the Consumer Information Institute. For information call 649-6666.

Third annual convention of Realty World, a national real estate program for independent brokers, is being concluded this weekend in New Orieans.

Virginia Homeowners Inc. of Vienna, Va., plans several free seminars for persons planning to sell their houses. For information, call 821-8877.

Kettler Brother, Inc., has opened a new community of houses called Wood Edge at Signal Hill, in the Springfield, Va., area. Prices for the four- or the five-bedroom dwellings start at $97,500.

A new semester of courses will, begin Monday evening at the Columbia Technical Institute, 112 S. Wayne St., Arlington. A special course in building construction estimating will be offered. For information, call 920-8868.