Fairfax County officials forecast a need for as much as 15 million square feet of office space to house contractors and services that will follow military jobs to Fort Belvoir, one of the brightest spots in the Base Closure and Realignment Commission’s decision to move jobs to Fort Belvoir.

The figure comes from the county’s assumption that for each of the some 22,000 workers headed to Belvoir by 2011 as a result of BRAC, three jobs will be created outside of the base to support it. And each of those workers will require about 225 square feet of commercial space, according to Fairfax County Economic Development Authority Chief Executive Officer Jerry Gordon.