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