Total........................................................... 111.1 78.1 64.1 4.2 1.8 2.3 5.7

Floorspace (Square Feet)

Total Floorspace1

Fewer than 500.................................... 3.2 1.1 Q Q Q Q 0.4

500 to 999........................................... 23.8 7.2 3.5 0.3 0.3 0.9 2.2

1,000 to 1,499..................................... 20.8 12.8 8.1 0.8 0.6 0.9 2.5

1,500 to 1,999..................................... 15.4 12.9 11.1 0.9 0.3 Q 0.4

2,000 to 2,499..................................... 12.2 11.2 10.0 0.7 Q Q Q

2,500 to 2,999..................................... 10.3 9.3 8.6 0.5 Q Q Q

3,000 to 3,499..................................... 6.7 6.1 5.8 0.3 Q N N

3,500 to 3,999..................................... 5.2 4.9 4.7 Q Q Q N

4,000 or More...................................... 13.3 12.6 12.0 0.5 Q Q N

Heated Floorspace

None.................................................... 3.6 1.5 0.9 Q Q Q 0.3

Fewer than 500.................................... 6.1 2.8 1.6 Q Q 0.3 0.5

500 to 999........................................... 27.7 11.9 7.7 0.6 0.3 0.8 2.5

1,000 to 1,499..................................... 26.0 18.4 14.0 1.1 0.8 0.7 1.9

1,500 to 1,999..................................... 17.6 15.3 13.8 0.8 Q Q 0.3

2,000 to 2,499..................................... 10.7 10.0 9.1 0.7 Q Q Q

2,500 to 2,999..................................... 7.7 7.2 6.7 0.3 Q Q Q

3,000 to 3,499..................................... 3.8 3.6 3.5 Q Q N N

3,500 to 3,999..................................... 2.6 2.5 2.3 Q Q Q N

4,000 or More...................................... 5.2 5.0 4.7 Q Q Q N

Centrally Cooled Floorspace

None.................................................... 45.2 26.4 20.2 1.7 1.1 0.7 2.6

Fewer than 500.................................... 3.9 2.4 1.7 Q Q Q 0.4

500 to 999........................................... 15.0 8.3 6.1 0.5 Q 0.5 1.1

1,000 to 1,499..................................... 15.6 11.6 8.9 0.4 Q 0.6 1.3

1,500 to 1,999..................................... 11.1 10.2 9.4 0.4 Q Q Q

2,000 to 2,499..................................... 7.0 6.6 5.9 0.4 Q Q Q

2,500 to 2,999..................................... 5.2 4.8 4.5 QQQQ

3,000 to 3,499..................................... 2.7 2.6 2.6 Q N N N

3,500 to 3,999..................................... 1.8 1.8 1.7 Q N Q N

4,000 or More...................................... 3.5 3.4 3.2 Q N Q N

Rooms

Total Number of Rooms

(Excluding Bathrooms)

1 or 2................................................... 3.4 0.5 Q N N Q Q

3.......................................................... 8.6 1.4 0.3 Q Q 0.3 0.7

4.......................................................... 16.9 7.3 3.5 0.6 0.6 1.0 1.6

5.......................................................... 23.9 16.5 12.7 0.9 0.4 0.5 2.0

6.......................................................... 22.9 19.4 17.0 1.3 0.3 Q 0.7

7.......................................................... 16.5 15.0 13.9 0.6 Q Q 0.4

8.......................................................... 9.8 9.2 8.6 0.4 Q N Q

9 or More............................................. 9.2 8.8 8.1 0.4 Q Q Q

Table HC3.2 Living Space Characteristics by Owner-Occupied Housing Units, 2005

2 to 4 

Units

5 or More 

Units

Mobile 

Homes

 Million U.S. Housing Units

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

Housing 

Units

(millions) 

Single-Family Units Apartments in 

Buildings With--

Living Space Characteristics Detached Attached

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC3.2 Living Space Characteristics by Owner-Occupied Housing Units, 2005

2 to 4 

Units

5 or More 

Units

Mobile 

Homes

 Million U.S. Housing Units

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

Housing 

Units

(millions) 

Single-Family Units Apartments in 

Buildings With--

Living Space Characteristics Detached Attached

Bedrooms

None (Studio/Efficiency)...................... 1.9 Q N N N Q N

1.......................................................... 10.2 1.7 0.7 Q Q 0.4 0.5

2.......................................................... 28.7 14.9 9.0 1.2 1.0 1.5 2.2

3.......................................................... 47.5 40.7 34.9 2.2 0.4 0.3 2.8

4.......................................................... 18.4 16.8 15.9 0.5 Q N Q

5 or More............................................. 4.3 4.0 3.6 Q Q N Q

Other Rooms (Excluding Bathrooms)

None (Studio/Efficiency)...................... 1.9 Q N N N Q N

1.......................................................... 5.3 2.4 1.1 Q Q Q 0.9

2.......................................................... 37.4 19.6 13.6 1.1 0.8 1.1 3.1

3.......................................................... 35.0 26.8 22.8 1.7 0.6 0.6 1.2

4.......................................................... 19.2 17.4 15.8 0.9 0.3 Q 0.3

5 or More............................................. 12.2 11.7 10.8 0.5 Q Q Q

Full Bathrooms

None.................................................... 0.3 Q Q N N N Q

1.......................................................... 54.9 29.4 22.4 2.0 1.3 1.4 2.2

2.......................................................... 45.9 39.3 33.0 1.6 0.5 0.8 3.4

3 or More............................................. 9.9 9.3 8.4 0.6 Q Q Q

Half Bathrooms

None.................................................... 79.4 50.8 40.8 1.8 1.2 1.8 5.1

1.......................................................... 29.7 25.5 21.8 2.0 0.6 0.5 0.6

2 or More............................................. 2.0 1.8 1.5 Q Q N Q

Basements

Basement in Single-Family Homes

and Apartments in 2-4 Unit Buildings

Yes...................................................... 35.5 30.9 27.5 2.4 1.0 N N

No........................................................ 51.9 39.1 36.5 1.7 0.9 N N

Not Asked (Mobile Homes or Apartment

in Buildings with 5 or More Units)......... 23.7 8.0 N N N 2.3 5.7

Finished Basement

Yes.................................................. 16.7 15.5 14.0 1.1 0.4 N N

No.................................................... 18.7 15.4 13.5 1.3 0.6 N N

No Basement................................... 51.9 39.1 36.5 1.7 0.9 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Number of Finished Rooms

in Basement

1...................................................... 8.1 7.4 6.8 0.4 Q N N

2...................................................... 3.8 3.6 3.2 0.2 Q N N

3 or More......................................... 4.8 4.5 4.0 Q Q N N

None (Basement Unfinished)........... 18.7 15.4 13.5 1.3 0.6 N N

No Basement................................... 51.9 39.1 36.5 1.7 0.9 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC3.2 Living Space Characteristics by Owner-Occupied Housing Units, 2005

2 to 4 

Units

5 or More 

Units

Mobile 

Homes

 Million U.S. Housing Units

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

Housing 

Units

(millions) 

Single-Family Units Apartments in 

Buildings With--

Living Space Characteristics Detached Attached

Heated Basement

Yes.................................................. 20.7 18.9 16.8 1.5 0.6 N N

All................................................. 14.3 13.1 11.6 1.0 0.4 N N

Part.............................................. 6.4 5.8 5.2 0.5 Q N N

None (Basement Not Heated).......... 14.8 12.0 10.7 0.9 0.4 N N

No Basement................................... 51.9 39.1 36.5 1.7 0.9 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Air-Conditioned Basement

Yes.................................................. 11.4 10.6 9.6 0.8 Q N N

All................................................. 8.4 7.8 7.2 0.6 Q N N

Part.............................................. 3.0 2.7 2.4 0.2 Q N N

No (Basement Not Cooled).............. 24.1 20.4 17.9 1.6 0.8 N N

No Basement................................... 51.9 39.1 36.5 1.7 0.9 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Attics

Attic in Single-Family Homes and

Apartments in 2-4 Unit Buildings

Yes...................................................... 22.8 20.6 19.8 0.7 Q N N

No........................................................ 64.6 49.5 44.2 3.5 1.8 N N

Not Asked (Mobile Homes or Apartment in

Buildings with 5 or More Units)............ 23.7 8.0 N N N 2.3 5.7

Finished Attic

Yes.................................................. 2.7 2.3 2.1 Q Q N N

No.................................................... 20.1 18.3 17.7 0.5 Q N N

No Attic............................................ 64.6 49.5 44.2 3.5 1.8 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Number of Finished Rooms in Attic

1...................................................... 2.2 1.9 1.8 Q N N N

2 or More......................................... 0.5 0.4 0.3 Q Q N N

None (Attic Unfinished).................... 20.1 18.3 17.7 0.5 Q N N

No Attic............................................ 64.6 49.5 44.2 3.5 1.8 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Heated Attic

Yes.................................................. 1.3 1.1 1.0 Q Q N N

All................................................. 1.0 0.8 0.7 Q Q N N

Part.............................................. 0.3 0.3 0.3 NNNN

No (Attic Not Heated)....................... 21.5 19.5 18.8 0.6 Q N N

No Attic............................................ 64.6 49.5 44.2 3.5 1.8 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Air-Conditioned Attic

Yes.................................................. 1.0 0.9 0.8 Q Q N N

All................................................. 0.7 0.6 0.5 Q Q N N

Part.............................................. 0.3 0.3 0.3 Q N N N

No (Attic Not Cooled)....................... 21.9 19.7 19.0 0.7 Q N N

No Attic............................................ 64.6 49.5 44.2 3.5 1.8 N N

Not Asked........................................ 23.7 8.0 N N N 2.3 5.7

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC3.2 Living Space Characteristics by Owner-Occupied Housing Units, 2005

2 to 4 

Units

5 or More 

Units

Mobile 

Homes

 Million U.S. Housing Units

 OwnerOccupied 

Housing 

Units 

(millions)

Type of Owner-Occupied Housing Unit

Housing 

Units

(millions) 

Single-Family Units Apartments in 

Buildings With--

Living Space Characteristics Detached Attached

Garage/Carport

(Single-Family and Mobile Homes)

Yes.......................................................... 61.5 55.5 51.3 2.7 N N 1.4

Attached.............................................. 41.8 38.2 35.9 2.2 N N Q

1-Car Garage................................... 9.5 7.8 7.1 0.7 N N N

2-Car Garage................................... 28.4 26.7 25.3 1.3 N N Q

3 or More Car Garage...................... 3.8 3.8 3.6 Q N N N

Detached............................................. 15.2 13.5 12.6 0.4 N N 0.5

1-Car Garage................................... 6.1 5.1 4.6 Q N N Q

2-Car Garage................................... 7.8 7.1 6.7 Q N N Q

3 or More Car Garage...................... 1.4 1.3 1.2 N N N Q

Carport (only)....................................... 4.7 4.0 3.0 Q N N 0.9

No........................................................... 25.1 18.5 12.7 1.4 N N 4.3

Not Asked (All Apartments)..................... 24.5 4.1 N N 1.8 2.3 N

 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.

 N = No cases in reporting sample.

 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