Fairfax County officials have cleared the way for Evans Co. to build the first phase of a 6-million-square-foot commercial development along Centreville Road near the Dulles Airport Access Road interchange.

County supervisors rezoned a two-acre residential tract for commercial use, making it compatible with 228 acres that were rezoned for commercial use several years ago.

A spokesman for Evans said this week that construction will begin in 1987 on a 400-room hotel and two eight-story office buildings, which will share a lobby.

The operator of the hotel has not been named, but developers said it will be an all-suites facility and will include conference centers and a health club.

The large-scale project, to be known as Woodland Park, is two miles east of Washington Dulles International Airport. Evans said the complex will take 10 to 15 years to complete.

Laughlin Realty of McLean has used a Williamsburg farmhouse in the middle of the community's business district as the company's only real estate office for decades.

Now, owner William (Kip) Laughlin has plans for the 23,000-square-foot corner of Chain Bridge Road and Old Dominion Drive. Laughlin plans to build a three-story office building to accommodate his real estate company and a bank.

Plans were approved by Fairfax officials and the McLean Planning Committee, but there has been some community opposition to the possible destruction of the house, which has become a landmark to many longtime McLean residents.

Laughlin said he has found a vacant lot about three blocks from the present site and has made a deal with a McLean home builder to restore the house and sell it for residential purposes.

Laughlin said plans to move the house hinge on his getting approval from the Virginia Department of Highways and Transportation and public utilities. The house originally was part of the old Laughlin family dairy farm.

Realty Diversified Services (RDS) of Vienna has broken ground for The Concourse, a 350,000-square-foot office complex to be built on one of the few remaining prime sites in the Tysons Corner area.

Nearly 400 persons attended recent ceremonies under a giant tent on the site behind the Shoney's Hotel on Springhill Road near Westwood Center. The site backs up to parkland. Plans call for including two tennis courts and jogging trails.

While 13 percent office vacancy rates prevail at Tysons Corner today, RDS officials say they are a step ahead of some of their competitors even though The Concourse won't be finished until next summer.

Engineering Research Associates, a high-technology firm with 200 employes, has leased 90,000 square feet in the building.

In spite of strong opposition from the Great Falls, Chase Hill and McLean citizens groups, Fairfax supervisors have approved a controversial application by W. H. P. Inc. and Wills Investment Inc. to build 73 houses on more than 100 acres on the south side of Rte. 7, west of Wolf Trap Farm Park and east of Colvin Run Mill.

Nearby residents opposed the plan for several reasons, including the potential impact on the environmentally sensitive Difficult Run stream valley, which dominates the western part of the site.

The developers have agreed to give the Fairfax County Park Authority 56 acres, to be maintained as parkland as part of its rezoning effort. Fairfax officials and developers negotiated more than nine months before agreeing on 19 conditions for the development.

Project attorney Keith Martin said developer Reed Wills will develop the site and prepare the lots. Negotiations are under way with potential builders. Prices for the new homes are expected to exceed $250,000.