Total................................................................... 111.1 72.1 7.6 7.8 16.7 6.9

Floorspace (Square Feet)

Total Floorspace1

Fewer than 500............................................ 3.2 0.4 Q 0.6 1.7 0.4

500 to 999................................................... 23.8 4.8 1.4 4.2 10.2 3.2

1,000 to 1,499............................................. 20.8 10.6 1.8 1.8 4.0 2.6

1,500 to 1,999............................................. 15.4 12.4 1.5 0.5 0.5 0.4

2,000 to 2,499............................................. 12.2 10.7 1.0 0.2 Q Q

2,500 to 2,999............................................. 10.3 9.4 0.6 Q Q Q

3,000 to 3,499............................................. 6.7 6.3 0.3 Q N N

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

4,000 or More.............................................. 13.3 12.7 0.6 Q Q N

Heated Floorspace

None............................................................ 3.6 1.1 Q 0.5 1.3 0.4

Fewer than 500............................................ 6.1 2.0 0.4 1.1 2.1 0.6

500 to 999................................................... 27.7 9.8 2.0 3.7 9.0 3.3

1,000 to 1,499............................................. 26.0 16.4 2.1 1.8 3.6 2.1

1,500 to 1,999............................................. 17.6 15.2 1.1 0.4 0.5 0.4

2,000 to 2,499............................................. 10.7 9.5 0.9 Q Q Q

2,500 to 2,999............................................. 7.7 7.1 0.4 Q Q Q

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

3,500 to 3,999............................................. 2.6 2.4 Q Q Q N

4,000 or More.............................................. 5.2 4.9 Q Q Q N

Centrally Cooled Floorspace

None............................................................ 45.2 24.6 3.6 5.0 8.8 3.2

Fewer than 500............................................ 3.9 2.0 0.3 0.4 0.8 0.5

500 to 999................................................... 15.0 6.8 1.1 1.4 4.3 1.5

1,000 to 1,499............................................. 15.6 10.2 1.0 0.8 2.3 1.3

1,500 to 1,999............................................. 11.1 9.9 0.5 Q 0.4 Q

2,000 to 2,499............................................. 7.0 6.1 0.6 Q Q Q

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

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

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

4,000 or More.............................................. 3.5 3.3 Q N Q N

Rooms

Total Number of Rooms

(Excluding Bathrooms)

1 or 2........................................................... 3.4 Q Q 0.4 2.6 Q

3.................................................................. 8.6 0.6 0.7 1.4 5.0 0.9

4.................................................................. 16.9 4.7 1.8 2.7 5.6 2.1

5.................................................................. 23.9 15.1 1.6 2.1 2.8 2.3

6.................................................................. 22.9 19.1 1.8 0.7 0.4 0.9

7.................................................................. 16.5 14.9 0.8 Q Q 0.4

8.................................................................. 9.8 8.9 0.5 Q Q Q

9 or More..................................................... 9.2 8.5 0.4 Q Q Q

Type of Housing Unit

Table HC2.2 Living Space Characteristics by Type of Housing Unit, 2005

 Million U.S. Housing Units

Living Space Characteristics Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Detached

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Type of Housing Unit

Table HC2.2 Living Space Characteristics by Type of Housing Unit, 2005

 Million U.S. Housing Units

Living Space Characteristics Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Detached

Bedrooms

None (Studio/Efficiency).............................. 1.9 N N 0.3 1.6 N

1.................................................................. 10.2 1.0 0.7 1.7 6.3 0.5

2.................................................................. 28.7 11.3 2.8 4.3 7.4 2.9

3.................................................................. 47.5 38.8 3.2 1.2 1.2 3.1

4.................................................................. 18.4 17.1 0.7 Q Q 0.3

5 or More..................................................... 4.3 3.9 0.2 Q Q Q

Other Rooms (Excluding Bathrooms)

None (Studio/Efficiency).............................. 1.9 N N 0.3 1.6 N

1.................................................................. 5.3 1.6 Q 0.6 1.9 1.1

2.................................................................. 37.4 17.0 3.2 3.7 9.6 3.9

3.................................................................. 35.0 25.5 2.5 2.4 3.3 1.4

4.................................................................. 19.2 16.8 1.1 0.7 Q 0.4

5 or More..................................................... 12.2 11.2 0.6 Q Q Q

Full Bathrooms

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

1.................................................................. 54.9 27.4 4.8 6.4 13.4 2.9

2.................................................................. 45.9 35.6 2.1 1.2 3.1 3.9

3 or More..................................................... 9.9 8.8 0.7 Q Q Q

Half Bathrooms

None............................................................ 79.4 47.2 4.2 6.5 15.3 6.2

1.................................................................. 29.7 23.3 3.1 1.2 1.4 0.7

2 or More..................................................... 2.0 1.6 0.3 Q N Q

Basements

Basement in Single-Family Homes

and Apartments in 2-4 Unit Buildings

Yes.............................................................. 35.5 30.2 3.8 1.5 N N

No............................................................... 51.9 41.9 3.8 6.2 N N

Not Asked (Mobile Homes or Apartment

in Buildings with 5 or More Units)................ 23.7 N N N 16.7 6.9

Finished Basement

Yes.......................................................... 16.7 14.7 1.6 0.5 N N

No............................................................ 18.7 15.5 2.2 1.0 N N

No Basement........................................... 51.9 41.9 3.8 6.2 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Number of Finished Rooms

in Basement

1.............................................................. 8.1 7.2 0.7 Q N N

2.............................................................. 3.8 3.4 0.3 Q N N

3 or More................................................. 4.8 4.1 0.6 Q N N

None (Basement Unfinished)................... 18.7 15.5 2.2 1.0 N N

No Basement........................................... 51.9 41.9 3.8 6.2 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Type of Housing Unit

Table HC2.2 Living Space Characteristics by Type of Housing Unit, 2005

 Million U.S. Housing Units

Living Space Characteristics Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Detached

Heated Basement

Yes.......................................................... 20.7 17.9 2.1 0.7 N N

All......................................................... 14.3 12.4 1.4 0.5 N N

Part...................................................... 6.4 5.6 0.6 Q N N

None (Basement Not Heated).................. 14.8 12.2 1.7 0.8 N N

No Basement........................................... 51.9 41.9 3.8 6.2 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Air-Conditioned Basement

Yes.......................................................... 11.4 10.1 1.1 Q N N

All......................................................... 8.4 7.6 0.7 Q N N

Part...................................................... 3.0 2.5 0.3 Q N N

No (Basement Not Cooled)...................... 24.1 20.1 2.7 1.3 N N

No Basement........................................... 51.9 41.9 3.8 6.2 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Attics

Attic in Single-Family Homes and

Apartments in 2-4 Unit Buildings

Yes.............................................................. 22.8 21.6 1.1 Q N N

No............................................................... 64.6 50.5 6.5 7.6 N N

Not Asked (Mobile Homes or Apartment in

Buildings with 5 or More Units).................... 23.7 N N N 16.7 6.9

Finished Attic

Yes.......................................................... 2.7 2.4 0.3 Q N N

No............................................................ 20.1 19.2 0.9 Q N N

No Attic.................................................... 64.6 50.5 6.5 7.6 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Number of Finished Rooms in Attic

1.............................................................. 2.2 2.0 Q N N N

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

None (Attic Unfinished)............................ 20.1 19.2 0.9 Q N N

No Attic.................................................... 64.6 50.5 6.5 7.6 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Heated Attic

Yes.......................................................... 1.3 1.2 Q Q N N

All......................................................... 1.0 0.9 Q Q N N

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

No (Attic Not Heated)............................... 21.5 20.4 1.0 Q N N

No Attic.................................................... 64.6 50.5 6.5 7.6 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Air-Conditioned Attic

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

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

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

No (Attic Not Cooled)............................... 21.9 20.7 1.1 Q N N

No Attic.................................................... 64.6 50.5 6.5 7.6 N N

Not Asked................................................ 23.7 N N N 16.7 6.9

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Type of Housing Unit

Table HC2.2 Living Space Characteristics by Type of Housing Unit, 2005

 Million U.S. Housing Units

Living Space Characteristics Attached 2 to 4 Units 5 or More 

Units

Mobile 

Homes

Apartments in Buildings 

With-- Housing 

Units 

(millions)

Single-Family Units

Detached

Garage/Carport

(Single-Family and Mobile Homes)

Yes................................................................. 61.5 56.1 3.9 N N 1.5

Attached...................................................... 41.8 38.8 2.9 N N Q

1-Car Garage........................................... 9.5 8.3 1.2 N N N

2-Car Garage........................................... 28.4 26.8 1.6 N N Q

3 or More Car Garage.............................. 3.8 3.7 Q N N N

Detached..................................................... 15.2 13.9 0.8 N N 0.5

1-Car Garage........................................... 6.1 5.5 0.4 N N Q

2-Car Garage........................................... 7.8 7.2 0.4 N N Q

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

Carport (only)............................................... 4.7 3.5 Q N N 1.0

No................................................................... 25.1 15.9 3.7 N N 5.4

Not Asked (All Apartments)............................. 24.5 N N 7.8 16.7 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