Chatham Square is an urban infill redevelopment project located near the historic district of Old Town Alexandria, Virginia, across the Potomac River from Washington, D.C. This U.S. Department of Housing and Urban Development (HUD) HOPE VI project replaced 100 distressed 1940s-era public housing units on two city blocks, with a higher-density, mixed-income community of 100 market-rate, for-sale luxury townhomes and 52 public housing rental units that were designed to be indistinguishable from the townhouse component.