The Fairfax County Board of Supervisers has approved zoning for a $150 million commercial-residential complex of six buildings on 60 acres at the intersection of Nutley Road and I-66, where a terminal station of Metro rapid transit is expected to be operating in about 1986.

The development is named Hunter's Branch for a stream that flows through the undeveloped property and is planned by a group of general partners, including J.W. Marriott Jr., Richard E. Marriott, Eugene N. Hooper, A. James Clark, David W. Evans and Justin Hinders.

A McLean-based firm headed by Evans will be the developer. Smith, Segreti & Tepper is doing the architectural plans.

The project has been in the planning stage for several years. Evans said construction is expected to begin late this year.

The complex will include three 12-story office buildings with some retail space and three apartment buildings that will rise six stories and have 350 units. Whether the apartments will be rental or sold as condominiums has not been determined. The site will be developed with parking for 4,300 cars.

The site is on the south side of Route I-66, which will provide another major entry into downtown Washington within two years.

The Metro rail system, as planned to serve that Vienna-Oakton section of rapidly growing Fairfax County, will use the center section of the six-lane, divided I-66 that will provide a major throughway connecting to I-81, which runs north and south through mid-Virginia.

Another major development has been in the works for several years for an undeveloped 50-acre tract on the north side of I-66 at Nutley Road. However, a foreclosure action has slowed that project.