A tightly packed array of shops, offices and living space would sprout around the Springfield Mall, according to details of a proposed enhancement project on file with Fairfax County.

A partnership that includes Vornado Realty Trust is seeking to add 323,200 square feet of exterior retail, more than 1 million square feet of office space, a 300-room hotel and 2,000 new dwellings, as well as upgrades to the existing mall. It is hoped the long-awaited proposal will convert one of the region’s least-heralded shopping malls into a revitalized mixed-used center.