Total................................................................... 111.1 2,033 1,618 1,031 791 630 401

Total Floorspace (Square Feet)

Fewer than 500............................................... 3.2 357 336 113 188 177 59

500 to 999....................................................... 23.8 733 667 308 343 312 144

1,000 to 1,499................................................. 20.8 1,157 1,086 625 435 409 235

1,500 to 1,999................................................. 15.4 1,592 1,441 906 595 539 339

2,000 to 2,499................................................. 12.2 2,052 1,733 1,072 765 646 400

2,500 to 2,999................................................. 10.3 2,523 2,010 1,346 939 748 501

3,000 to 3,499................................................. 6.7 3,020 2,185 1,401 1,177 851 546

3,500 to 3,999................................................. 5.2 3,549 2,509 1,508 1,344 950 571

4,000 or More.................................................. 13.3 5,147 3,621 2,667 1,705 1,199 883

Heated Floorspace (Square Feet)1

None............................................................... 3.6 1,145 0 352 387 0 119

Fewer than 500............................................... 6.1 745 359 134 375 180 67

500 to 999....................................................... 27.7 992 766 353 469 362 167

1,000 to 1,499................................................. 26.0 1,599 1,234 715 621 479 277

1,500 to 1,999................................................. 17.6 2,184 1,739 1,109 782 622 397

2,000 to 2,499................................................. 10.7 2,724 2,227 1,401 971 794 499

2,500 to 2,999................................................. 7.7 3,174 2,718 1,956 1,050 899 647

3,000 to 3,499................................................. 3.8 3,884 3,232 2,250 1,442 1,200 835

3,500 to 3,999................................................. 2.6 4,388 3,741 2,310 1,420 1,211 748

4,000 or More.................................................. 5.2 5,740 5,169 3,833 1,860 1,675 1,242

Cooled Floorspace (Square Feet)

None............................................................... 45.2 1,683 1,262 0 674 506 0

Fewer than 500............................................... 3.9 1,094 791 376 502 363 173

500 to 999....................................................... 15.0 1,269 985 771 584 453 355

1,000 to 1,499................................................. 15.6 1,716 1,356 1,240 680 537 491

1,500 to 1,999................................................. 11.1 2,219 1,780 1,740 783 628 614

2,000 to 2,499................................................. 7.0 2,770 2,228 2,221 952 766 764

2,500 to 2,999................................................. 5.2 3,083 2,779 2,719 1,016 916 896

3,000 to 3,499................................................. 2.7 3,958 3,228 3,212 1,497 1,221 1,215

3,500 to 3,999................................................. 1.8 4,947 4,005 3,757 1,485 1,202 1,127

4,000 or More.................................................. 3.5 5,680 5,109 5,046 1,795 1,615 1,595

Total Number of Rooms

(Excluding Bathrooms)

1 or 2............................................................... 3.4 620 505 188 408 332 124

3...................................................................... 8.6 761 652 272 460 394 165

4...................................................................... 16.9 1,120 923 419 491 405 184

5...................................................................... 23.9 1,634 1,303 759 650 518 302

6...................................................................... 22.9 2,204 1,702 1,112 812 627 410

7...................................................................... 16.5 2,639 2,094 1,411 937 744 501

8...................................................................... 9.8 3,148 2,507 1,739 1,076 857 595

9 or More......................................................... 9.2 3,772 3,034 2,256 1,143 920 684

Bedrooms

None (Studio/Efficiency)..................................... 1.9 552 508 210 375 345 143

1...................................................................... 10.2 805 657 266 533 435 176

2...................................................................... 28.7 1,381 1,084 548 619 486 245

3...................................................................... 47.5 2,214 1,760 1,167 822 653 433

4...................................................................... 18.4 3,051 2,447 1,743 966 775 552

5 or More......................................................... 4.3 3,587 2,846 1,879 924 733 484

Table HC1.2.2 Living Space Characteristics by Average Floorspace, 

Housing 

Units 

(millions) Heated Cooled

Per Housing Unit

Living Space Characteristics Total1 Heated Cooled Total1

 Per Housing Unit and Per Household Member, 2005

Per Household Member

Average Square Feet

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC1.2.2 Living Space Characteristics by Average Floorspace, 

Housing 

Units 

(millions) Heated Cooled

Per Housing Unit

Living Space Characteristics Total1 Heated Cooled Total1

 Per Housing Unit and Per Household Member, 2005

Per Household Member

Average Square Feet

Other Rooms (Excluding Bathrooms)

None (Studio/Efficiency).................................. 1.9 552 508 210 375 345 143

1...................................................................... 5.3 1,135 925 547 487 397 235

2...................................................................... 37.4 1,341 1,091 559 552 449 230

3...................................................................... 35.0 2,076 1,624 1,052 803 628 407

4...................................................................... 19.2 2,776 2,209 1,495 995 792 536

5 or More......................................................... 12.2 3,483 2,766 2,026 1,211 961 704

Full Bathrooms

None............................................................... 0.3 1,436 920 0 732 469 0

1...................................................................... 54.9 1,538 1,188 509 665 514 220

2...................................................................... 45.9 2,288 1,830 1,380 825 660 498

3 or More......................................................... 9.9 3,607 3,041 2,337 1,177 992 762

Half Bathrooms

None............................................................... 79.4 1,744 1,364 821 709 554 334

1...................................................................... 29.7 2,718 2,229 1,526 960 787 539

2 or More......................................................... 2.0 3,339 2,674 2,029 1,158 928 704

Basement (in Single-Family Homes and

Apartments in 2-4 Unit Buildings)

Yes................................................................. 35.5 3,011 2,301 1,345 1,123 859 502

No................................................................... 51.9 1,870 1,513 1,070 699 565 400

Not Asked (Mobile Home or Apartment...........

Building with 5 or More Units).......................... 23.7 926 828 474 427 382 219

Finished Basement

Yes.............................................................. 16.7 3,131 2,683 1,770 1,116 957 631

No............................................................... 18.7 2,903 1,960 966 1,130 763 376

No Basement............................................... 51.9 1,870 1,513 1,070 699 565 400

Not Asked.................................................... 23.7 926 828 474 427 382 219

Number of Finished Rooms

in Basement

1.................................................................. 8.1 2,950 2,438 1,411 1,087 898 520

2.................................................................. 3.8 3,117 2,625 1,841 1,083 912 640

3 or More..................................................... 4.8 3,449 3,146 2,322 1,189 1,085 801

Basement Unfinished.................................. 18.7 2,903 1,960 966 1,130 763 376

No Basement............................................... 51.9 1,870 1,513 1,070 699 565 400

Not Asked.................................................... 23.7 926 828 474 427 382 219

Heated Basement

Yes.............................................................. 20.7 3,027 2,775 1,739 1,124 1,030 646

All............................................................ 14.3 3,064 2,911 1,901 1,142 1,085 709

Part.......................................................... 6.4 2,944 2,474 1,379 1,083 910 508

Basement Not Heated................................. 14.8 2,988 1,637 794 1,122 615 298

No Basement............................................... 51.9 1,870 1,513 1,070 699 565 400

Not Asked.................................................... 23.7 926 828 474 427 382 219

Air-Conditioned Basement

Yes.............................................................. 11.4 3,142 2,965 2,714 1,106 1,044 956

All............................................................ 8.4 3,147 3,029 2,831 1,110 1,069 999

Part.......................................................... 3.0 3,130 2,783 2,382 1,095 974 833

Basement Not Cooled................................. 24.1 2,948 1,988 699 1,132 763 268

No Basement............................................... 51.9 1,870 1,513 1,070 699 565 400

Not Asked.................................................... 23.7 926 828 474 427 382 219

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC1.2.2 Living Space Characteristics by Average Floorspace, 

Housing 

Units 

(millions) Heated Cooled

Per Housing Unit

Living Space Characteristics Total1 Heated Cooled Total1

 Per Housing Unit and Per Household Member, 2005

Per Household Member

Average Square Feet

Attic (in Single-Family Homes and

Apartments in 2-4 Unit Buildings)

Yes................................................................. 22.8 3,566 2,109 1,473 1,319 780 545

No................................................................... 64.6 1,897 1,735 1,079 711 650 404

Not Asked (Mobile Home or Apartment

Building with 5 or More Units)...................... 23.7 926 828 474 427 382 219

Finished Attic

Yes.............................................................. 2.7 3,683 2,413 1,368 1,246 816 463

No............................................................... 20.1 3,550 2,068 1,487 1,330 775 558

No Attic........................................................ 64.6 1,897 1,735 1,079 711 650 404

Not Asked.................................................... 23.7 926 828 474 427 382 219

Number of Finished Rooms in Attic

1.................................................................. 2.2 3,631 2,326 1,357 1,302 834 487

2 or More..................................................... 0.5 3,913 2,795 1,415 1,059 757 383

Attic Unfinished........................................... 20.1 3,550 2,068 1,487 1,330 775 558

No Attic........................................................ 64.6 1,897 1,735 1,079 711 650 404

Not Asked.................................................... 23.7 926 828 474 427 382 219

Heated Attic

Yes.............................................................. 1.3 3,671 3,292 2,257 1,145 1,026 704

All............................................................ 1.0 3,419 3,183 1,967 1,108 1,031 637

Part.......................................................... 0.3 4,418 3,614 3,118 1,239 1,013 874

Attic Not Heated.......................................... 21.5 3,559 2,035 1,425 1,332 762 533

No Attic........................................................ 64.6 1,897 1,735 1,079 711 650 404

Not Asked.................................................... 23.7 926 828 474 427 382 219

Air-Conditioned Attic

Yes.............................................................. 1.0 4,000 3,625 2,988 1,343 1,217 1,003

All............................................................ 0.7 3,900 3,602 2,810 1,300 1,200 936

Part.......................................................... 0.3 4,220 3,676 3,379 1,442 1,256 1,155

Attic Not Cooled.......................................... 21.9 3,546 2,042 1,406 1,318 759 523

No Attic........................................................ 64.6 1,897 1,735 1,079 711 650 404

Not Asked.................................................... 23.7 926 828 474 427 382 219

Garage/Carport

(Single-Family and Mobile Homes)

Yes................................................................. 61.5 2,540 2,046 1,424 944 761 529

Attached...................................................... 41.8 2,603 2,199 1,654 941 795 598

1-Car Garage........................................... 9.5 2,064 1,664 1,039 775 624 390

2-Car Garage........................................... 28.4 2,688 2,270 1,767 973 822 639

3 or More Car Garage.............................. 3.8 3,307 2,995 2,340 1,093 990 773

Detached..................................................... 15.2 2,561 1,840 950 993 714 369

1-Car Garage........................................... 6.1 2,310 1,561 699 912 617 276

2-Car Garage........................................... 7.8 2,715 2,009 1,084 1,039 769 415

3 or More Car Garage.............................. 1.4 2,803 2,123 1,308 1,079 817 503

Carport (only)............................................... 4.7 1,909 1,342 882 815 573 376

No................................................................... 25.1 1,859 1,353 675 696 506 253

Not Asked (Apartments).................................. 24.5 941 818 410 436 379 190

 1 Excludes floorspace in unheated garages.

 Q = Data withheld either because the Relative Standard Error (RSE) was greater than 50 percent or fewer than 10 households 

were sampled.

 Notes: ● Because of rounding, data may not sum to totals. ● See Glossary for definition of terms used in these tables.

 Source: Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A, B, C of the 2005 

Residential Energy Consumption Survey.

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables