The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
| ZIP Code | City | Housing Affordability Index | |
|---|---|---|---|
| 1. | 04101 | Portland | 64 |
| 2. | 04576 | Southport | 76 |
| 3. | 03907 | Ogunquit | 77 |
| 4. | 04544 | East Boothbay | 81 |
| 5. | 04421 | Castine | 85 |
| 6. | 04017 | Chebeague Island | 90 |
| 7. | 04548 | Georgetown | 92 |
| 8. | 04679 | Southwest Harbor | 94 |
| 9. | 04473 | Orono | 95 |
| 10. | 04681 | Stonington | 96 |
| 11. | 04848 | Islesboro | 98 |
| 12. | 04609 | Bar Harbor | 99 |
| 13. | 04050 | Long Island | 101 |
| 14. | 04003 | Bailey Island | 102 |
| 15. | 04066 | Orrs Island | 103 |
| 16. | 04571 | Trevett | 104 |
| 17. | 04064 | Old Orchard Beach | 105 |
| 18. | 04005 | Biddeford | 109 |
| 19. | 04662 | Northeast Harbor | 109 |
| 20. | 03909 | York | 110 |
