Springfield, Ill., is the nation's most affordable housing market and San Francisco is the nation's most expensive.
The National Association of Home Builders has released its year-end Housing Opportunity Index for all metro regions. The HOI is a quarterly measure of the percentage of homes sold that a family earning the median income can afford to buy. "With an HOI score of 89.6, nearly 90 percent of homes sold in the nations most affordable market of Springfield, Ill., during the third quarter could be purchased by households making that areas median family income of $59,100. The median home sale price in Springfield at that time was $95,000. By comparison, less than 6 percent of homes sold in San Francisco the nations least affordable market with an HOI of 5.7 and a median home price of $505,000 were affordable to those making that areas median family income of $74,900."
Thanks to Califonria Futures Network
FULL STORY: Springfield, Ill., Most Affordable Housing Market In Third Quarter 2000

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UCLA Lewis Center for Regional Policy Studies
Mpact (formerly Rail~Volution)
Chaddick Institute at DePaul University
City of Piedmont, CA
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research