Total.......................................................... 111.1 24.5 1,090 902 341 872 780 441

Total Floorspace (Square Feet)

Fewer than 500...................................... 3.1 2.3 403 360 165 366 348 93

500 to 999.............................................. 22.2 14.4 763 660 277 730 646 303

1,000 to 1,499........................................ 19.1 5.8 1,223 1,130 496 1,187 1,086 696

1,500 to 1,999........................................ 14.4 1.0 1,700 1,422 412 1,698 1,544 1,348

2,000 to 2,499........................................ 12.7 0.4 2,139 1,598 QQQQ

2,500 to 2,999........................................ 10.1 QQQQQQQ

3,000 or More......................................... 29.6 0.3 QQQQQQ

Heated Floorspace (Square Feet)

None...................................................... 3.6 1.8 1,048 0 Q 827 0 407

Fewer than 500...................................... 6.1 3.2 716 373 93 490 362 126

500 to 999.............................................. 27.7 12.7 811 754 297 744 728 315

1,000 to 1,499........................................ 26.0 5.4 1,318 1,215 518 1,196 1,190 736

1,500 to 1,999........................................ 17.6 0.9 2,121 1,735 509 1,707 1,707 1,327

2,000 to 2,499........................................ 10.7 QQQQQQQ

2,500 to 2,999........................................ 7.8 QQQQQQQ

3,000 or More......................................... 11.6 QQQQQQQ

Cooled Floorspace (Square Feet)

None...................................................... 45.2 13.8 1,130 887 0 773 681 0

Fewer than 500...................................... 3.9 1.2 653 498 399 609 531 357

500 to 999.............................................. 15.1 5.7 795 732 795 783 716 734

1,000 to 1,499........................................ 15.6 3.0 1,290 1,247 1,247 1,181 1,098 1,181

1,500 to 1,999........................................ 11.1 0.5 Q Q Q 1,704 1,546 1,704

2,000 to 2,499........................................ 7.0 QQQQQQQ

2,500 to 2,999........................................ 5.2 QQQQQQQ

3,000 or More......................................... 8.0 Q N N N Q Q Q

Total Number of Rooms

(Excluding Bathrooms)

1 or 2...................................................... 3.4 3.1 760 378 Q 614 549 215

3............................................................. 8.6 6.4 757 649 350 708 642 292

4............................................................. 16.9 8.3 1,066 846 205 924 834 475

5............................................................. 23.9 4.9 1,129 988 438 1,119 992 674

6............................................................. 22.9 1.1 1,398 1,118 531 1,396 1,295 951

7............................................................. 16.5 0.4 QQQQQQ

8............................................................. 9.8 QQQQQQQ

9 or More................................................ 9.2 QQQQQQQ

Bedrooms

None (Studio/Efficiency)............................ 1.9 1.9 543 398 Q 554 528 209

1............................................................. 10.2 7.9 854 642 186 704 620 318

2............................................................. 28.7 11.7 1,092 901 395 978 886 514

3............................................................. 47.5 2.4 1,243 1,098 350 1,423 1,262 925

4............................................................. 18.4 0.3 QQQQQQ

5 or More................................................ 4.3 QQQQQQQ

Table HC1.2.4 Living Space Characteristics by Average Floorspace--Apartments, 2005

Total Heated Cooled Total Heated Cooled

2 to 4 Unit Building

Living Space Characteristics

5 or More Unit Building

Average Square Feet per Apartment in a --

 Housing 

Units 

(millions) Apartments

(millions)

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC1.2.4 Living Space Characteristics by Average Floorspace--Apartments, 2005

Total Heated Cooled Total Heated Cooled

2 to 4 Unit Building

Living Space Characteristics

5 or More Unit Building

Average Square Feet per Apartment in a --

 Housing 

Units 

(millions) Apartments

(millions)

Other Rooms (Excluding Bathrooms)

None (Studio/Efficiency)......................... 1.9 1.9 543 398 Q 554 528 209

1............................................................. 5.3 2.5 988 667 406 840 753 327

2............................................................. 37.4 13.3 977 822 237 853 764 388

3............................................................. 35.0 5.7 1,190 976 407 1,018 886 673

4............................................................. 19.2 0.8 1,433 1,241 695 Q Q Q

5 or More................................................ 12.2 0.3 QQQQQQ

Full Bathrooms

None...................................................... 0.3 QQQQQQQ

1............................................................. 54.9 19.8 1,041 850 223 803 734 336

2............................................................. 45.9 4.3 1,253 1,088 841 1,148 969 856

3 or More................................................ 9.9 0.3 QQQQQQ

Half Bathrooms

None...................................................... 79.4 21.8 1,057 901 310 831 736 390

1............................................................. 29.7 2.7 1,252 903 514 1,303 1,242 987

2 or More................................................ 2.0 QQQQNNN

Basement (in Single-Family Homes and

Apartments in 2-4 Unit Buildings

Yes........................................................ 35.5 1.5 1,656 1,204 262 N N N

No.......................................................... 51.9 6.2 952 829 360 N N N

Not Asked (Mobile Home or Apartment..

Building with 5 or More Units)................. 23.7 16.7 N N N 872 780 441

Finished Basement

Yes..................................................... 16.7 0.5 2,101 1,605 Q N N N

No...................................................... 18.7 1.0 1,428 997 Q N N N

No Basement...................................... 51.9 6.2 952 829 360 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

Number of Finished Rooms

in Basement

1......................................................... 8.1 QQQQNNN

2......................................................... 3.8 QQQQNNN

3 or More............................................ 4.8 QQQQNNN

Basement Unfinished......................... 18.7 1.0 1,428 997 Q N N N

No Basement...................................... 51.9 6.2 952 829 360 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

Heated Basement

Yes..................................................... 20.7 0.7 1,818 1,727 Q N N N

All................................................... 14.3 0.5 1,821 1,790 Q N N N

Part................................................. 6.4 QQQQNNN

Basement Not Heated........................ 14.8 0.8 1,518 756 Q N N N

No Basement...................................... 51.9 6.2 952 829 360 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC1.2.4 Living Space Characteristics by Average Floorspace--Apartments, 2005

Total Heated Cooled Total Heated Cooled

2 to 4 Unit Building

Living Space Characteristics

5 or More Unit Building

Average Square Feet per Apartment in a --

 Housing 

Units 

(millions) Apartments

(millions)

Air-Conditioned Basement

Yes..................................................... 11.4 QQQQNNN

All................................................... 8.4 QQQQNNN

Part................................................. 3.0 QQQQNNN

Basement Not Cooled........................ 24.1 1.3 1,638 1,110 Q N N N

No Basement...................................... 51.9 6.2 952 829 360 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

Attic (in Single-Family Homes and

Apartments in 2-4 Unit Buildings)

Yes........................................................ 22.8 QQQQNNN

No.......................................................... 64.6 7.6 1,056 887 347 N N N

Not Asked (Mobile Home or Apartment

Building with 5 or More Units)............. 23.7 16.7 N N N 872 780 441

Finished Attic

Yes..................................................... 2.7 QQQQNNN

No...................................................... 20.1 QQQQNNN

No Attic............................................... 64.6 7.6 1,056 887 347 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

Number of Finished Rooms in Attic

1......................................................... 2.2 NNNNNNN

2 or More............................................ 0.5 QQQQNNN

Attic Unfinished.................................. 20.1 QQQQNNN

No Attic............................................... 64.6 7.6 1,056 887 347 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

Heated Attic

Yes..................................................... 1.3 QQQQNNN

All................................................... 1.0 QQQQNNN

Part................................................. 0.3 NNNNNNN

Attic Not Heated................................. 21.5 QQQQNNN

No Attic............................................... 64.6 7.6 1,056 887 347 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

Air-Conditioned Attic

Yes..................................................... 1.0 QQQQNNN

All................................................... 0.7 QQQQNNN

Part................................................. 0.3 NNNNNNN

Attic Not Cooled................................. 21.9 QQQQNNN

No Attic............................................... 64.6 7.6 1,056 887 347 N N N

Not Asked........................................... 23.7 16.7 N N N 872 780 441

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

sampled.

 N = No cases in reporting sample.

 -- = Data Not Applicable.

 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