Total............................................................. 111.1 14.7 7.4 12.5 12.5 18.9 18.6 17.3 9.2

Census Region and Division

Northeast.................................................. 20.6 5.6 1.8 3.3 2.4 2.7 2.3 1.5 0.9

New England......................................... 5.5 1.9 0.4 0.7 0.6 0.6 0.6 0.4 0.3

Middle Atlantic....................................... 15.1 3.8 1.4 2.6 1.9 2.1 1.7 1.1 0.6

Midwest..................................................... 25.6 4.1 2.3 3.2 3.2 4.0 2.8 4.1 1.8

East North Central................................. 17.7 3.0 1.8 2.1 2.2 3.0 2.1 2.4 1.2

West North Central................................ 7.9 1.1 0.5 1.1 1.0 1.0 0.8 1.7 0.7

South........................................................ 40.7 2.8 1.7 3.5 4.2 7.1 8.4 8.3 4.8

South Atlantic........................................ 21.7 1.4 0.8 1.6 2.2 3.8 4.7 4.8 2.4

East South Central................................ 6.9 0.7 0.2 0.7 0.8 1.0 1.2 1.5 0.8

West South Central............................... 12.1 0.6 0.7 1.3 1.3 2.3 2.5 2.0 1.5

West......................................................... 24.2 2.2 1.6 2.5 2.6 5.0 5.1 3.4 1.7

Mountain............................................... 7.6 0.5 Q 0.6 0.8 1.4 1.7 1.4 1.0

Pacific................................................... 16.6 1.7 1.4 1.9 1.8 3.6 3.4 2.0 0.7

Urban/Rural Location (as Self-Reported)

City........................................................... 47.1 7.3 4.2 5.8 5.9 8.4 7.2 5.2 3.1

Town......................................................... 19.0 3.3 1.3 2.7 2.3 2.9 2.7 2.4 1.5

Suburbs.................................................... 22.7 1.4 1.1 2.3 2.3 3.6 4.7 4.7 2.5

Rural......................................................... 22.3 2.6 0.8 1.7 2.0 4.1 4.0 5.0 2.2

Climate Zone1

Less than 2,000 CDD and--

Greater than 7,000 HDD........................ 10.9 2.0 0.4 1.1 1.0 2.0 1.6 1.8 1.2

5,500 to 7,000 HDD............................... 26.1 5.4 2.3 3.6 2.8 4.1 2.9 3.2 1.8

4,000 to 5,499 HDD............................... 27.3 4.8 2.0 3.2 3.5 3.7 4.3 4.4 1.2

Less than 4,000 HDD............................ 24.0 1.7 1.8 2.6 2.5 4.7 5.1 3.7 1.9

2000 CDD or More and--

Less than 4,000 HDD............................ 22.8 0.9 0.9 2.0 2.7 4.4 4.6 4.3 3.1

Type of Housing Unit

Single-Family Detached........................ 72.1 9.8 5.5 10.0 8.6 10.3 9.8 11.7 6.5

Single-Family Attached......................... 7.6 1.0 0.5 0.7 0.6 1.4 2.0 0.8 0.6

Apartments in 2-4 Unit Buildings........... 7.8 2.4 0.5 0.6 0.8 1.2 1.3 0.7 0.3

Apartments in 5 or More Unit Buildings. 16.7 1.4 1.0 1.0 2.2 4.0 3.6 2.3 1.3

Mobile Homes....................................... 6.9 Q N Q 0.4 2.0 1.9 1.9 0.5

Ownership of Housing Unit

Owned...................................................... 78.1 9.6 5.3 9.4 8.4 12.3 12.3 13.7 7.1

Single-Family Detached........................ 64.1 8.1 4.8 8.7 7.4 9.1 8.9 11.1 6.0

Single-Family Attached......................... 4.2 0.8 0.3 0.3 Q 0.7 0.9 0.5 0.4

Apartments in 2-4 Unit Buildings........... 1.8 0.6 QQQQQQQ

Apartments in 5 or More Unit Buildings. 2.3 Q Q N 0.3 0.8 0.7 Q Q

Mobile Homes....................................... 5.7 Q N Q 0.4 1.5 1.5 1.7 0.4

Rented..................................................... 33.0 5.1 2.1 3.1 4.0 6.5 6.3 3.6 2.2

Single-Family Detached........................ 8.0 1.7 0.7 1.3 1.2 1.1 0.9 0.6 0.5

Single-Family Attached......................... 3.4 0.3 Q 0.4 0.4 0.7 1.0 0.3 Q

Apartments in 2-4 Unit Buildings........... 5.9 1.8 0.3 0.3 0.6 1.0 1.1 0.5 Q

Apartments in 5 or More Unit Buildings. 14.4 1.3 0.9 1.0 1.8 3.2 2.8 2.1 1.2

Mobile Homes....................................... 1.2 Q N Q Q 0.5 0.4 Q Q

Table HC5.1 Housing Unit Characteristics by Year of Construction, 2005

 Million U.S. Housing Units

Housing Unit Characteristics

2000 to 

2005

Year of Construction

Before 

1940

1940 to 

1949

1960 to 

1969

1970 to 

1979

Housing 

Units 

(millions)

1950 to 

1959

1980 to 

1989

1990 to 

1999

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC5.1 Housing Unit Characteristics by Year of Construction, 2005

 Million U.S. Housing Units

Housing Unit Characteristics

2000 to 

2005

Year of Construction

Before 

1940

1940 to 

1949

1960 to 

1969

1970 to 

1979

Housing 

Units 

(millions)

1950 to 

1959

1980 to 

1989

1990 to 

1999

Number of Stories in

Single-Family Homes

1 Story...................................................... 46.7 3.8 3.8 8.0 6.8 7.7 6.6 6.6 3.5

2 Stories................................................... 28.0 6.2 1.9 2.3 1.8 3.2 4.4 5.1 3.2

3 or More Stories...................................... 2.5 0.6 Q 0.2 0.3 0.2 0.4 0.5 Q

Split-level.................................................. 1.9 Q Q Q 0.3 0.5 0.4 0.3 Q

Other......................................................... 0.5 QQQQQQQN

Not Asked................................................. 31.4 3.9 1.4 1.8 3.3 7.2 6.8 4.9 2.1

Number of Floors in Apartment

Buildings with 5 or More Units

1 or 2 Floors.............................................. 8.2 0.4 Q 0.5 1.1 2.4 1.9 1.2 0.6

3 or 4 Floors.............................................. 6.0 0.6 0.4 0.3 0.6 1.4 1.2 0.9 0.6

5 to 10 Floors............................................ 1.6 0.4 0.3 QQQQQQ

11 to 20 Floors.......................................... 0.6 N QQQQQQN

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

Not Asked................................................. 94.4 13.3 6.5 11.5 10.3 14.9 15.0 15.0 7.9

Major Outside Wall Construction

Siding (Aluminum, Vinyl, Steel)................. 35.3 4.6 2.0 4.0 2.9 5.7 5.6 7.1 3.6

Brick......................................................... 31.3 3.5 2.5 3.5 4.7 5.7 4.6 4.5 2.3

Wood........................................................ 20.0 4.1 1.1 2.0 2.1 3.2 3.9 2.7 1.0

Stucco....................................................... 14.8 1.3 1.1 1.6 1.5 2.7 3.2 2.3 1.2

Concrete/Concrete Block.......................... 5.3 Q Q 0.9 0.8 1.1 0.8 0.5 0.7

Composition (Shingle)............................... 1.9 0.7 Q 0.2 Q 0.2 Q Q Q

Stone........................................................ 1.0 QQQQQQQQ

Other......................................................... 1.5 Q Q Q 0.2 Q 0.3 Q Q

Foundation/Basement of SingleFamily Units and Apartments in

2 to 4 Unit Buildings

(more than one may apply)

Basement................................................. 35.5 8.3 3.2 5.5 3.6 4.1 3.7 4.6 2.5

Crawlspace............................................... 25.1 5.1 2.5 3.8 3.2 3.3 2.9 3.1 1.2

Concrete Slab........................................... 40.2 2.7 2.1 4.2 4.8 7.0 7.7 7.0 4.7

Not Asked (Mobile Homes and

Apartments in Buildings

With 5 or More Units)............................ 23.7 1.4 1.0 1.2 2.5 6.0 5.5 4.2 1.8

Fuels Used for Any Use

(more than one may apply)

Electricity.................................................. 111.1 14.7 7.4 12.5 12.5 18.9 18.6 17.3 9.2

Natural Gas............................................... 69.5 10.9 5.8 9.2 8.5 10.5 10.2 9.3 5.2

Wood........................................................ 14.4 2.2 0.8 1.1 1.5 2.6 2.9 2.8 0.7

Fuel Oil..................................................... 8.4 2.8 1.0 1.5 1.0 1.0 0.5 0.4 0.2

LPG.......................................................... 12.6 1.8 0.7 0.8 1.0 1.8 2.3 2.7 1.4

Kerosene.................................................. 1.7 0.3 Q Q Q 0.4 0.3 Q Q

Solar......................................................... 0.2 N N N QQQQQ

Main Heating Fuel

Natural Gas............................................... 58.2 9.2 4.9 7.8 7.1 8.8 8.4 7.8 4.2

Electricity.................................................. 33.7 1.2 0.9 2.4 3.3 6.9 7.8 7.3 4.0

Fuel Oil..................................................... 7.7 2.6 0.9 1.4 0.9 0.9 0.4 0.3 0.2

LPG.......................................................... 6.0 0.8 0.5 0.4 0.3 0.9 1.1 1.4 0.7

Wood........................................................ 2.9 0.7 Q 0.3 0.4 0.7 0.4 0.3 Q

Kerosene.................................................. 0.7 Q N QQQQQN

Solar......................................................... Q NNNNNNNQ

Other......................................................... Q N Q Q Q N Q N N

None......................................................... 1.3 N Q Q 0.2 0.4 0.3 0.2 Q

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Table HC5.1 Housing Unit Characteristics by Year of Construction, 2005

 Million U.S. Housing Units

Housing Unit Characteristics

2000 to 

2005

Year of Construction

Before 

1940

1940 to 

1949

1960 to 

1969

1970 to 

1979

Housing 

Units 

(millions)

1950 to 

1959

1980 to 

1989

1990 to 

1999

Natural Gas Available

in Neighborhood

Yes........................................................... 80.5 12.0 6.4 10.4 9.9 12.8 12.1 10.9 6.0

Actually Use Natural Gas...................... 69.5 10.9 5.8 9.2 8.5 10.5 10.2 9.3 5.2

Do Not Use Natural Gas........................ 11.1 1.1 0.6 1.2 1.4 2.4 2.0 1.6 0.8

No............................................................. 30.6 2.7 1.0 2.1 2.5 6.1 6.5 6.4 3.3

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