FIFTEEN CONDOMINIUM units and parking spaces at the Towers of Cathedral Avenue at 4201 Cathedral Ave. NW will be auctioned off March 6. Nine of the units will be "absolute sales," which, according to the auctioneer, means that they will go to the highest bidder regardless of price and with no restriction on the minimum bid.

The sale is designed to dispose of the remaining units at the complex. They will be available for inspection at open houses from noon to 4 p.m. this weekend and next.

Would-be bidders will have to present a $3,500 cashier's check, certified check or money order. Further information is available at the open houses or by calling 800-292-0700, extension 2000.

CENTENNIAL DEVELOPMENT CORP. has released plans for a 246,000-square-foot office complex to be known as The Summit at Reston. The development will be built adjacent to the Dulles Toll Road near Sunrise Valley Drive.

Designed by The Architects Collaborative (TAC) of Cambridge, Mass., the project includes two six-story buildings connected by a three-story glass atrium. The terraced buildings with lots of glass will have landscaped balconies on the top three floors available for tenant use.

Construction is expected to start this summer. The buildings will sit at right angles to each other across the Dulles Airport Road and toll lanes from Reston's town center.

FOUR FAIRFAX COUNTY offices are moving from Fairfax City to Fair Oaks Corporate Center, a Rouse & Associates development on Route 50 in the Fair Oaks area.

The Department of Recreation, the Office for Children, the Department of Extension and Continuing Education and the Area Agency on Aging will share a new facility at the corner of Waples Mill Road and Pender Drive, which is part of a five-building Corporate Center project. Construction on a sixth building is slated for spring. The development is near the proposed site of a new home for Fairfax County government offices, but the Board of Supervisors last year delayed making a decision to move the government headquarters from Fairfax City to Fair Oaks.

IN THE BUSINESS . . . The Artery Organization will celebrate its 25th anniversary Friday with a gala at Strathmore Hall Arts Center in Bethesda. The theme will be a "stroll down memory lane" and the program will feature important events in the quarter-century that the firm has been in business . . . The Fairfax County Board of Supervisors will hold a public hearing Feb. 25 at 2:30 p.m. on a proposal by Westminster School Inc., a private school on Gallows Road, to permit expansion of the school's facilities. The campus is in a residential neighborhood . . . Westerra Development Co. of San Diego has started construction of a three-building office complex at Tysons Corner. To be known as Tysons Pond, the project is on Spring Hill Road west of Tysons Corner Shopping Center. Designed by Davis & Carter, a Tysons-area architectural, engineering and planning firm, the development includes two four-story office building and a six-story building. Jaycor, a high-tech corporation, has already leased the first of the two 55,000-square foot buildings The complex is expected to be finished in 1987 . . . The National Trust for Historic Preservation has broken ground for a new $1.3 million conference and reception center for the Decatur House Museum on Lafayette Square. The 4,400-square-foot center will be able to hold as many as 300 guests, and the trust expects the museum to benefit both from the rental income and from the reduction in wear and tear on the main building.

PERSONNEL FILE . . . Philip Yates, former Fairfax County zoning administrator, has joined the engineering firm of Dewberry & Davis where he will be a project manager and senior planner. . . . Dick Eagan has been named mid-Atlantic regional director for Century 21 . . . W. Robert Little, formerly vice president of the Landmarks Group, has joined Scott-Long Construction as executive vice president . . . The J. E. Robert Co. has named Donald K. Eboch asset manager. The firm has also named Robert J. Day as sales manager of its Texas branch . . . Michael Karel has joined the Weissberg Corp. as director of leasing . . . Costain Washington Inc., has appointed Thomas E. West its director of marketing . . . The Master Builders Association of has installed James J. Meyer of Turner Construction Co. as its 1985 president. Taking office along with him were: James Buck of Skinker & Garrett, Inc., first vice president, and William R. Barotti of the George Hyman Construction Co., second vice president . . . The Gulledge Corp. has named Thomas K. Wasp senior vice president-acquisitions, and Jody C. Souder assistant vice president-acquisitions . . . Neal Friedman and Jonathan L. Kaylor have been named vice presidents at Smithy Braedon . . . Frank P. Tatum, president of ERA Tatum Properties Inc., was named outstanding broker of the year at Electronic Realty Associates . . . J. Bradley Cederhahl has been named commercial property manager at Gates, Hudson & Associates Inc. . . . At Hugh T. Peck Properties, Linda Hamm has been named vice president and director of training, Eugene La Roca has been named to manage the Capitol Hill office, and Frank D. Cummings has joined the firm as manager of the Bowie office.

ON THE MOVE . . . Off to Tysons: Booth, Pritchard & Dudley, a Fairfax County law firm with a long list of clients in the land development business, has announced it is moving its headquarters from Fairfax City to Tysons Corner. The firm will move into two top floors of a building under construction by Rouse & Associates at 8280 Greenboro Dr. The firm has grown in recent years because of its "expertise in counseling land developers, financial institutions and growing high-technology firms. Our move to the downtown of Fairfax County will make it easier for us to serve those clients, many of whom are located in the Tysons-Reston-Dulles area," said Dennis McArver, managing partner . . . At the same time, Shannon & Luchs is moving both its commercial sales and leasing divisions to offices on Old Courthouse Road in the Tysons Corner area to take advantage of what the firm calls "the fastest-growing office market in the Washington region."

"By joining these two divisions, we are now able to offer a complete package to developers in the Northern Virginia market," said Vincent Chiarello, vice president and regional manager of the commercial leasing division. The commercial sales division had been located in the District, but "with the demands now being made in the Virginia area, it has become increasingly important to expand in this market to maximize our representation in Northern Virginia," said Frank Quinn, vice president and director of the commercial division.