U.S. Housing Units Built by Era (1940 – 2009)

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The U.S. states with the oldest housing – % built before 1960

1. New York – 56.5% (Median year built: 1956)
2. Rhode Island – 52.6% (Median year built: 1958)
3. Massachusetts – 51.6% (Median year built: 1959)
4. Pennsylvania – 49.0% (Median year built: 1961)
5. Connecticut – 45.1% (Median year built: 1964)
6. Iowa – 43.6% (Median year built: 1966)
7. Illinois – 42.3% (Median year built: 1967)
8. New Jersey – 42.0% (Median year built: 1966)
9. Ohio – 41.9% (Median year built: 1967)
10. Michigan – 38.9% (Median year built: 1969)

The U.S. states with the newest housing – % built before 1960

1. Nevada – 5.5% (Median year built: 1993)
2. Alaska – 8.8% (Median year built: 1983)
3. Arizona – 9.1% (Median year built: 1989)
4. Florida – 11.9% (Median year built: 1985)
5. Georgia – 13.8% (Median year built: 1987)
6. South Carolina – 15.2% (Median year built: 1986)
7. Hawaii – 16.1% (Median year built: 1978)
8. Mississippi – 16.1% (Median year built: 1982)
9. Texas – 16.3% (Median year built: 198)
10. Arkansas – 16.5% (Median year built: 1982)