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

Census Region and Division

Northeast.................................................... 20.6 13.4 10.4 1.4 1.0 0.3 0.4

New England........................................... 5.5 3.8 3.1 Q 0.3 Q Q

Middle Atlantic........................................ 15.1 9.6 7.3 1.3 0.6 Q Q

Midwest...................................................... 25.6 19.4 16.9 1.0 0.5 0.4 0.7

East North Central.................................. 17.7 13.6 11.7 0.7 0.5 Q 0.3

West North Central................................. 7.9 5.8 5.2 Q Q Q 0.3

South.......................................................... 40.7 28.9 23.8 0.8 Q 0.9 3.1

South Atlantic.......................................... 21.7 15.3 12.0 0.6 Q 0.9 1.5

East South Central.................................. 6.9 5.3 4.6 Q N N 0.7

West South Central................................. 12.1 8.3 7.2 Q N Q 0.9

West........................................................... 24.2 16.4 13.0 1.0 Q 0.7 1.6

Mountain................................................. 7.6 5.8 4.4 Q Q Q 0.8

Pacific..................................................... 16.6 10.6 8.7 0.5 Q 0.6 0.8

Urban/Rural Location (as Self-Reported)

City............................................................. 47.1 28.0 21.1 2.6 1.2 1.6 1.6

Town........................................................... 19.0 12.7 10.9 0.5 0.3 0.3 0.6

Suburbs...................................................... 22.7 18.1 16.0 0.9 0.3 0.4 0.5

Rural........................................................... 22.3 19.3 16.0 Q Q Q 3.1

Climate Zone1

Less than 2,000 CDD and--

Greater than 7,000 HDD......................... 10.9 8.6 7.2 Q Q Q 0.5

5,500 to 7,000 HDD................................ 26.1 18.5 15.0 1.2 0.8 0.4 1.1

4,000 to 5,499 HDD................................ 27.3 18.4 14.9 1.4 0.6 0.5 1.0

Less than 4,000 HDD.............................. 24.0 16.4 13.5 0.6 Q 0.7 1.5

2000 CDD or More and--

Less than 4,000 HDD.............................. 22.8 16.3 13.4 0.3 Q 0.6 1.7

Year of Construction

1939 or Before............................................ 14.7 9.6 8.1 0.8 0.6 Q Q

1940 to 1949............................................... 7.4 5.3 4.8 0.3 Q Q N

1950 to 1959............................................... 12.5 9.4 8.7 0.3 Q N Q

1960 to 1969............................................... 12.5 8.4 7.4 Q Q 0.3 0.4

1970 to 1979............................................... 18.9 12.3 9.1 0.7 Q 0.8 1.5

1980 to 1989............................................... 18.6 12.3 8.9 0.9 Q 0.7 1.5

1990 to 1999............................................... 17.3 13.7 11.1 0.5 Q Q 1.7

2000 to 2005............................................... 9.2 7.1 6.0 0.4 Q Q 0.4

Number of Stories

Single-Family Homes

1 Story.................................................... 46.7 39.2 38.3 0.9 N N N

2 Stories................................................. 28.0 24.5 21.9 2.6 N N N

3 or More Stories.................................... 2.5 2.2 1.7 0.6 N N N

Split-level................................................ 1.9 1.8 1.7 Q N N N

Other....................................................... 0.5 0.5 0.4 Q N N N

Not Asked............................................... 31.4 9.9 N N 1.8 2.3 5.7

Table HC3.1 Housing Unit Characteristics by Owner-Occupied Housing Unit, 2005

 Million Housing Units

Type of Owner-Occupied Housing Unit

Single-Family Units Apartments in Buildings 

With--

U.S.

Housing 

Units 

Housing Unit Characteristics Detached Attached (millions Mobile 

Homes

 OwnerOccupied 

Housing 

Units 

(millions) 2 to 4 Units 5 or More 

Units

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC3.1 Housing Unit Characteristics by Owner-Occupied Housing Unit, 2005

 Million Housing Units

Type of Owner-Occupied Housing Unit

Single-Family Units Apartments in Buildings 

With--

U.S.

Housing 

Units 

Housing Unit Characteristics Detached Attached (millions Mobile 

Homes

 OwnerOccupied 

Housing 

Units 

(millions) 2 to 4 Units 5 or More 

Units

Number of Floors in Apartment

Buildings with 5 or More Units

1 or 2 Floors............................................... 8.2 0.9 N N N 0.9 N

3 or 4 Floors............................................... 6.0 0.9 N N N 0.9 N

5 to 10 Floors............................................. 1.6 Q N N N Q N

11 to 20 Floors............................................ 0.6 Q N N N Q N

More than 20 Floors.................................... Q Q N N N Q N

Not Asked................................................... 94.4 75.8 64.1 4.2 1.8 N 5.7

Major Outside Wall Construction

Siding (Aluminum, Vinyl, Steel).................. 35.3 28.2 21.4 1.0 0.6 Q 5.0

Brick........................................................... 31.3 19.2 16.2 1.5 0.5 0.9 N

Wood.......................................................... 20.0 14.5 12.8 0.7 0.3 Q 0.6

Stucco........................................................ 14.8 9.4 7.9 0.6 Q 0.7 N

Concrete/Concrete Block............................ 5.3 3.3 2.8 QQQQ

Composition (Shingle)................................ 1.9 1.5 1.4 Q Q N Q

Stone.......................................................... 1.0 0.7 0.6 Q N N N

Other.......................................................... 1.5 1.4 1.0 QQQQ

Foundation/Basement of SingleFamily Units and Apartments in

2 to 4 Unit Buildings

(more than one may apply)

Basement................................................... 35.5 30.9 27.5 2.4 1.0 N N

Crawlspace................................................. 25.1 20.9 20.3 0.6 Q N N

Concrete Slab............................................. 40.2 31.8 29.5 1.7 0.6 N N

Not Asked (Mobile Homes and

Apartments in Buildings

With 5 or More Units).............................. 23.7 8.0 N N N 2.3 5.7

Fuels Used for Any Use

(more than one may apply)

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

Natural Gas................................................ 69.5 48.8 41.3 3.2 1.5 1.0 1.8

Wood.......................................................... 14.4 13.3 12.3 0.3 Q Q 0.6

Fuel Oil....................................................... 8.4 6.4 5.5 0.3 0.3 Q 0.2

LPG............................................................ 12.6 11.1 9.2 Q Q Q 1.7

Kerosene.................................................... 1.7 1.4 1.0 Q N N 0.3

Solar........................................................... 0.2 0.2 0.2 NNNN

Main Space Heating Fuel

Natural Gas................................................ 58.2 41.8 35.3 2.8 1.2 1.0 1.6

Electricity.................................................... 33.7 21.3 16.5 0.9 0.3 1.1 2.4

Fuel Oil....................................................... 7.7 5.8 5.0 0.3 0.3 Q Q

LPG............................................................ 6.0 5.2 4.1 Q N Q 1.0

Wood.......................................................... 2.9 2.6 2.3 Q N N Q

Kerosene.................................................... 0.7 0.5 Q Q N N Q

Solar........................................................... Q Q Q NNNN

Other.......................................................... Q NNNNNN

None........................................................... 1.3 0.6 0.3 N Q Q Q

Natural Gas Available

in Neighborhood

Yes............................................................. 80.5 55.2 46.3 3.7 1.6 1.5 2.1

Actually Use Natural Gas........................ 69.5 48.8 41.3 3.2 1.5 1.0 1.8

Do Not Use Natural Gas......................... 11.1 6.4 5.1 0.5 Q 0.4 0.3

No............................................................... 30.6 22.9 17.7 0.5 Q 0.8 3.7

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC3.1 Housing Unit Characteristics by Owner-Occupied Housing Unit, 2005

 Million Housing Units

Type of Owner-Occupied Housing Unit

Single-Family Units Apartments in Buildings 

With--

U.S.

Housing 

Units 

Housing Unit Characteristics Detached Attached (millions Mobile 

Homes

 OwnerOccupied 

Housing 

Units 

(millions) 2 to 4 Units 5 or More 

Units

 1. One of five climatically distinct areas, determined according to the 30-year average (1971-2000) of the annual heating and cooling 

degree-days. A household is assigned to a climate zone according to the 30-year average annual degree-days for an appropriate nearby 

weather station.

 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