All 50 states and DC, county by county
Basements are a regional building practice, not a national one. In the Midwest most houses have one; on the Gulf Coast almost none do. We publish every county either way — but the page changes: where basements are rare, the same USDA soil data is used to describe the slab and the footings instead.
| State | Counties | Basements | Mean risk index | Cost factor |
|---|---|---|---|---|
| Alabama | 67 | Few homes have one | 48 | ×0.88 |
| Alaska | 29 | Few homes have one | 44 | ×1.30 |
| Arizona | 15 | Almost no homes have one — slab-on-grade is the norm | 34 | ×1.03 |
| Arkansas | 75 | Few homes have one | 42 | ×0.87 |
| California | 58 | Few homes have one | 50 | ×1.24 |
| Colorado | 64 | A large share of homes have one | 38 | ×1.10 |
| Connecticut | 8 | Most homes have one | 38 | ×1.15 |
| Delaware | 3 | A minority of homes have one | 35 | ×1.05 |
| District of Columbia | 1 | A large share of homes have one | 41 | ×1.18 |
| Florida | 67 | Almost no homes have one — slab-on-grade is the norm | 42 | ×0.95 |
| Georgia | 159 | Few homes have one | 41 | ×0.92 |
| Hawaii | 5 | Almost no homes have one — slab-on-grade is the norm | 43 | ×1.35 |
| Idaho | 44 | A minority of homes have one | 30 | ×1.00 |
| Illinois | 102 | Most homes have one | 54 | ×1.08 |
| Indiana | 92 | Most homes have one | 53 | ×0.93 |
| Iowa | 99 | Most homes have one | 52 | ×0.92 |
| Kansas | 105 | A large share of homes have one | 45 | ×0.90 |
| Kentucky | 120 | A large share of homes have one | 44 | ×0.90 |
| Louisiana | 64 | Almost no homes have one — slab-on-grade is the norm | 54 | ×0.90 |
| Maine | 16 | A large share of homes have one | 36 | ×1.04 |
| Maryland | 24 | A large share of homes have one | 39 | ×1.10 |
| Massachusetts | 14 | Most homes have one | 36 | ×1.18 |
| Michigan | 83 | Most homes have one | 39 | ×0.98 |
| Minnesota | 87 | Most homes have one | 56 | ×1.05 |
| Mississippi | 82 | Almost no homes have one — slab-on-grade is the norm | 50 | ×0.86 |
| Missouri | 115 | A large share of homes have one | 42 | ×0.95 |
| Montana | 56 | A large share of homes have one | 42 | ×1.02 |
| Nebraska | 93 | Most homes have one | 35 | ×0.92 |
| Nevada | 17 | Almost no homes have one — slab-on-grade is the norm | 35 | ×1.07 |
| New Hampshire | 10 | Most homes have one | 36 | ×1.08 |
| New Jersey | 21 | A large share of homes have one | 39 | ×1.12 |
| New Mexico | 33 | Almost no homes have one — slab-on-grade is the norm | 33 | ×0.95 |
| New York | 62 | Most homes have one | 40 | ×1.22 |
| North Carolina | 100 | Few homes have one | 40 | ×0.93 |
| North Dakota | 53 | Most homes have one | 56 | ×0.96 |
| Ohio | 88 | Most homes have one | 51 | ×0.95 |
| Oklahoma | 77 | Few homes have one | 48 | ×0.89 |
| Oregon | 36 | A minority of homes have one | 37 | ×1.11 |
| Pennsylvania | 67 | Most homes have one | 38 | ×1.02 |
| Rhode Island | 5 | Most homes have one | 36 | ×1.12 |
| South Carolina | 46 | Almost no homes have one — slab-on-grade is the norm | 41 | ×0.90 |
| South Dakota | 66 | Most homes have one | 51 | ×0.94 |
| Tennessee | 95 | A minority of homes have one | 36 | ×0.91 |
| Texas | 254 | Almost no homes have one — slab-on-grade is the norm | 50 | ×0.94 |
| Utah | 29 | A minority of homes have one | 42 | ×1.03 |
| Vermont | 14 | Most homes have one | 36 | ×1.05 |
| Virginia | 133 | A large share of homes have one | 38 | ×1.00 |
| Washington | 39 | A minority of homes have one | 36 | ×1.16 |
| West Virginia | 55 | A large share of homes have one | 38 | ×0.88 |
| Wisconsin | 72 | Most homes have one | 35 | ×1.00 |
| Wyoming | 23 | A large share of homes have one | 38 | ×1.00 |
Mean risk index is the average of our combined county index. Cost factor is the regional multiplier in our price model, relative to the US average.
Page data updated