The Seminary West neighbourhood is the community west of I-395 but within the city limits of Alexandria.

Beauregard Street is the primary artery running north & south. There is a mix of development from town home communities, single family neighborhoods, three large senior citizen living centers, garden, and hi-rise apartments and condominiums.

The Mark Center office development is a large commercial area in this community, which also includes the Alexandria Campus of the Northern Virginia Community College and its Rachel M. Schlesinger Concert Hall and Arts Center. It is a 1,000,000-square-foot (93,000 m2) office tower complex developed for the US Dept of Defense and its BRAC initiative. The complex is an annex of US Army post Fort Belvoir. 6,300 federal office workers were expected to occupy the buildings.