The Fairfax County Board of Supervisors voted 6 to 2 last night to approve a controversial $3.3 million plan to renovate the Jefferson Village apartment complex and turn 119 of its 512 units into federally subsidized public housing.

"I think we took the only responsible action we could have taken so that rehabilitation will take place and that as many residents as possible will be spared from displacement," said Supervisor James M. Scott, a Democrat whose Providence district includes the rundown complex of two- and three-bedroom apartments on Rte. 50.

The plan calls for the county to pay $330,000 and the U.S. Department of Housing and Urban Development to contribute the balance of the $3.3 million for the 119 public housing units for low-income families.

The remaining 393 units will be purchased by Rosenberg Freeman Associates and Housing America Inc. for $9.2 million. The developers must meet county rehabilitation specifications and rent 20 percent of the units to moderate-income families.

Supervisor Nancy K. Falck (R-Dranesville) and Board Chairman John F. Herrity (R) voted against the measure. Both said they thought the developers were not providing enough cash to ensure the financial stability of the project. Supervisor Joseph Alexander (D-Lee) was not present.

Herrity also reiterated his belief that the county should avoid putting so many public housing units in one cluster and that implementing the plan would displace as many people as not implementing it.

Marshal B. Coyne, proprietor of Washington's Madison Hotel and principal owner of Jefferson Village, had applied to the county for permission to turn the complex into condominiums if the sale fell through.