The available affordable housing stock indicator uses the Housing Affordability Index (HAI) which measures the ability of a middle income family to afford the mortgage payments on a median priced home. When the index is 100 there is balance between ability to pay and cost. The lower index calculation depicts housing costs that are decreasingly less affordable. The HAI is calculated assuming a 30-year loan, 20% down payment and 25% of income for principal and interest payments.
In Washington, the available affordable Housing Stock Index (HAI). . .
- was 177 compared to NA in the U.S.;
- increased by 31 percent from 2010 to 2013.