The Dayton house you didn’t buy in 1980
A $300,000 house at 1980’s average index level, tracked to 2026 Q2.
The metro index went from 54.9 (the 1980 average) to 270.6 in 2026 Q2, 4.9× its 1980 level. That makes a $300,000 purchase about $1.48M today.
With 20% down ($60,000) and a 30-year loan at 1980’s average rate of 13.74%, today’s equity is about $1.48M, 25× the down payment. The loan would be paid off by now, so the equity equals the house’s value.
The S&P 500 index fund this site compares against (the TSP C Fund) begins in 1988, so there is no market comparison for a purchase before then.
Run your own numbers for 1980 →
House figures are estimates for the whole metro market, from the FHFA index. Not financial advice.
FAQ
What is a 1980 Dayton house worth today?
About $1.48M for a $300,000 house, a 4.9× market multiple to 2026 Q2 by the FHFA all-transactions index for Dayton-Kettering-Beavercreek, OH.
Why use an index instead of listings?
The FHFA index is built from repeat transactions on the same homes, so it controls for the mix of what happens to be for sale.
Is this investment advice?
No. This is historical arithmetic for education and entertainment.