aptfinder.org is a non-profit corporation of Multifamily Affordable Properties (MAP). The mission of MAP is to make affordable housing resources available to the people who need it. aptfinder.org is a non-profit website formed to connect low income households with affordable apartment communities throughout Washington State. Listings are voluntarily advertised on our site by owners and managers of rental apartments for low-income households whose annual income is below 80% of area median income.