Table 4.2b – Foundation By Construction Year
Number of households by year of construction | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Before 1946 | 1946-1960 | 1961-1977 | 1978-1983 | 1984-1995 | 1996-2000 | 2001-2010 | 2011 or later | Not stated | ||||||||||
Dwelling has a basement for foundation | ||||||||||||||||||
Yes | 941,497 | A | 894,165 | A | 1,851,089 | A | 698,466 | A | 1,333,146 | A | 532,454 | A | 1,189,736 | A | 584,488 | A | - | U |
No | 114,183 | A | 97,611 | M | 198,844 | A | 121,209 | A | 211,835 | A | 75,954 | M | 117,691 | M | 101,888 | M | - | U |
Valid skip Footnote 1 | 351,215 | A | 696,690 | A | 1,228,618 | A | 646,612 | A | 641,225 | A | 207,244 | M | 513,253 | A | 442,201 | A | 289,468 | M |
Don’t know | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | - |
Not stated | 86,413 | M | 62,211 | M | 148,789 | M | 88,367 | M | 106,713 | M | - | U | 92,714 | M | - | U | - | U |
Dwelling has a crawl space for foundation | ||||||||||||||||||
Yes | 216,988 | A | 155,319 | A | 251,399 | A | 113,578 | M | 184,534 | A | 47,651 | M | 63,715 | M | 41,334 | M | - | U |
No | 838,692 | A | 836,457 | A | 1,798,534 | A | 706,097 | A | 1,360,447 | A | 560,757 | A | 1,243,711 | A | 645,042 | A | - | U |
Valid skip Footnote 1 | 351,215 | A | 696,690 | A | 1,228,618 | A | 646,612 | A | 641,225 | A | 207,244 | M | 513,253 | A | 442,201 | A | 289,468 | M |
Don’t know | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | - |
Not stated | 86,413 | M | 62,211 | M | 148,789 | M | 88,367 | M | 106,713 | M | - | U | 92,714 | M | - | U | - | U |
Dwelling has concrete slabs for foundation | ||||||||||||||||||
Yes | 72,793 | M | 92,085 | M | 275,415 | A | 122,437 | A | 203,562 | A | 75,838 | M | 119,927 | A | 105,023 | M | - | U |
No | 1,023,792 | A | 930,643 | A | 1,829,364 | A | 741,201 | A | 1,394,329 | A | 541,624 | A | 1,219,656 | A | 600,593 | A | 85,483 | M |
Valid skip Footnote 1 | 351,215 | A | 696,690 | A | 1,228,618 | A | 646,612 | A | 641,225 | A | 207,244 | M | 513,253 | A | 442,201 | A | 289,468 | M |
Don’t know | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | - |
Not stated | - | U | - | U | 83,309 | M | - | U | - | U | - | U | - | U | - | U | - | U |
Dwelling has pillars for foundation | ||||||||||||||||||
Yes | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U |
No | 1,088,528 | A | 1,021,441 | A | 2,087,325 | A | 853,976 | A | 1,584,216 | A | 613,842 | A | 1,326,107 | A | 691,685 | A | 88,863 | M |
Valid skip Footnote 1 | 351,215 | A | 696,690 | A | 1,228,618 | A | 646,612 | A | 641,225 | A | 207,244 | M | 513,253 | A | 442,201 | A | 289,468 | M |
Don’t know | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | - |
Not stated | - | U | - | U | 83,309 | M | - | U | - | U | - | U | - | U | - | U | - | U |
Other type of dwelling foundation | ||||||||||||||||||
Yes | 49,626 | M | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | - |
No | 1,046,959 | A | 1,008,963 | A | 2,076,231 | A | 852,617 | A | 1,581,672 | A | 607,641 | A | 1,325,587 | A | 694,468 | A | 90,061 | M |
Valid skip Footnote 1 | 351,215 | A | 696,690 | A | 1,228,618 | A | 646,612 | A | 641,225 | A | 207,244 | M | 513,253 | A | 442,201 | A | 289,468 | M |
Don’t know | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | - |
Not stated | - | U | - | U | 83,309 | M | - | U | - | U | - | U | - | U | - | U | - | U |
Dwelling has no foundation | ||||||||||||||||||
Yes | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U |
No | 1,084,715 | A | 1,019,865 | A | 2,092,336 | A | 860,177 | A | 1,586,920 | A | 612,140 | A | 1,339,026 | A | 699,735 | A | 89,562 | M |
Valid skip Footnote 1 | 351,215 | A | 696,690 | A | 1,228,618 | A | 646,612 | A | 641,225 | A | 207,244 | M | 513,253 | A | 442,201 | A | 289,468 | M |
Don’t know | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | U | - | - |
Not stated | - | U | - | U | 83,309 | M | - | U | - | U | - | U | - | U | - | U | - | U |
Basement/crawl space is heated | ||||||||||||||||||
Yes | 815,936 | A | 860,862 | A | 1,816,410 | A | 688,601 | A | 1,290,951 | A | 533,807 | A | 1,175,262 | A | 573,850 | A | 80,315 | M |
No | 207,992 | A | 76,299 | M | 99,645 | M | 75,063 | M | 115,274 | M | - | U | 60,064 | M | - | U | - | U |
Valid skip Footnote 2 | 376,917 | A | 727,544 | A | 1,328,861 | A | 701,379 | A | 738,682 | A | 250,142 | A | 577,311 | A | 508,832 | A | 291,166 | M |
Don’t know | - | U | - | U | - | U | - | - | - | U | - | - | - | - | 0 | - | - | - |
Not stated | 92,239 | M | 88,635 | M | 189,312 | A | 91,529 | M | 159,228 | A | 79,063 | M | 112,619 | M | 70,754 | M | - | U |
Any of the basement/crawl space outside walls insulated on the inside | ||||||||||||||||||
Yes | 590,737 | A | 686,829 | A | 1,574,958 | A | 612,731 | A | 1,146,634 | A | 486,281 | A | 1,108,922 | A | 552,583 | A | - | U |
No | 208,363 | A | 124,984 | M | 162,716 | A | 41,293 | M | 70,678 | M | - | U | - | U | - | U | - | U |
Valid skip Footnote 3 | 585,365 | A | 806,661 | A | 1,447,119 | A | 783,500 | A | 879,598 | A | 274,100 | A | 655,936 | A | 579,975 | A | 299,214 | M |
Don’t know | - | U | - | U | 84,173 | M | - | U | 69,537 | M | - | U | - | U | - | U | - | U |
Not stated | 87,656 | M | 96,436 | M | 167,902 | M | 88,918 | M | 142,945 | A | 73,320 | M | 98,773 | M | 52,013 | M | - | U |
Percentage of outside basement/crawl space walls insulated | ||||||||||||||||||
25 percent or less | - | U | - | U | - | U | - | U | - | U | - | - | - | U | - | U | - | U |
26 to 50 percent | 39,573 | M | 58,849 | M | 114,906 | M | 39,794 | M | 43,899 | M | - | U | - | U | - | U | - | U |
51 to 75 percent | 49,414 | M | 73,326 | M | 128,752 | M | 30,935 | M | 57,454 | M | - | U | - | U | - | U | - | U |
76 to 100 percent | 278,619 | M | 371,157 | A | 978,430 | A | 403,495 | A | 780,528 | A | 304,260 | A | 758,585 | A | 446,931 | A | - | U |
Valid skip Footnote 4 | 793,728 | A | 931,645 | A | 1,609,836 | A | 824,793 | A | 950,276 | A | 298,310 | A | 693,007 | A | 596,543 | A | 311,418 | M |
Don’t know | 147,493 | M | 209,780 | A | 367,666 | A | 152,829 | M | 294,117 | A | 151,483 | M | 251,473 | M | 79,785 | M | - | U |
Not stated | 106,572 | M | 101,110 | M | 218,595 | A | 102,653 | M | 169,630 | A | 89,026 | M | 139,226 | M | 64,406 | M | - | U |
Legend:
The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.
Notes:Due to rounding, the numbers may not add up and may differ slightly among tables.
Source:2019 Survey of Household Energy Use