#14. Nantucket County

- Median year homes built: 1983
- Homes built 1939 or earlier: 17.1% (2,134 homes)
- Homes built since 2000: 1.4% (170 homes)
- Total homes built: 12,449

#13. Dukes County

- Median year homes built: 1981
- Homes built 1939 or earlier: 20.2% (3,572 homes)
- Homes built since 2000: 0.4% (72 homes)
- Total homes built: 17,713

#12. Barnstable County

- Median year homes built: 1976
- Homes built 1939 or earlier: 11.6% (19,221 homes)
- Homes built since 2000: 0.4% (740 homes)
- Total homes built: 165,661

#11. Plymouth County

- Median year homes built: 1971
- Homes built 1939 or earlier: 21.7% (46,947 homes)
- Homes built since 2000: 0.9% (2,018 homes)
- Total homes built: 216,654

#10. Hampshire County

- Median year homes built: 1970
- Homes built 1939 or earlier: 27.5% (18,279 homes)
- Homes built since 2000: 0.6% (430 homes)
- Total homes built: 66,490

#9. Worcester County

- Median year homes built: 1966
- Homes built 1939 or earlier: 27.5% (97,195 homes)
- Homes built since 2000: 0.4% (1,404 homes)
- Total homes built: 353,405

#8. Norfolk County

- Median year homes built: 1964
- Homes built 1939 or earlier: 26.5% (77,801 homes)
- Homes built since 2000: 0.7% (2,047 homes)
- Total homes built: 293,420

#7. Bristol County

- Median year homes built: 1963
- Homes built 1939 or earlier: 31.6% (77,216 homes)
- Homes built since 2000: 0.4% (901 homes)
- Total homes built: 244,166

#6. Middlesex County

- Median year homes built: 1961
- Homes built 1939 or earlier: 32.4% (214,092 homes)
- Homes built since 2000: 0.8% (5,049 homes)
- Total homes built: 660,814

#5. Franklin County

- Median year homes built: 1961
- Homes built 1939 or earlier: 35.7% (12,297 homes)
- Homes built since 2000: 0.3% (92 homes)
- Total homes built: 34,424

#4. Essex County

- Median year homes built: 1960
- Homes built 1939 or earlier: 34.6% (113,530 homes)
- Homes built since 2000: 0.4% (1,406 homes)
- Total homes built: 328,460

#3. Hampden County

- Median year homes built: 1958
- Homes built 1939 or earlier: 28.6% (56,368 homes)
- Homes built since 2000: 0.2% (467 homes)
- Total homes built: 197,210

#2. Berkshire County

- Median year homes built: 1955
- Homes built 1939 or earlier: 36.3% (25,373 homes)
- Homes built since 2000: 0.2% (150 homes)
- Total homes built: 69,861

#1. Suffolk County

- Median year homes built: 1948
- Homes built 1939 or earlier: 46.0% (162,687 homes)
- Homes built since 2000: 0.9% (3,192 homes)
- Total homes built: 353,930