Total......................................................................... 111.1 30.0 34.8 18.4 15.9 12.0

Census Region and Division

Northeast.............................................................. 20.6 5.5 6.5 3.4 3.0 2.1

New England..................................................... 5.5 1.7 1.7 1.1 0.7 0.3

Middle Atlantic................................................... 15.1 3.8 4.8 2.4 2.4 1.7

Midwest................................................................. 25.6 7.3 8.4 4.1 3.2 2.5

East North Central............................................. 17.7 5.0 5.7 3.0 2.2 1.9

West North Central............................................ 7.9 2.3 2.7 1.1 1.0 0.7

South.................................................................... 40.7 11.5 12.5 7.0 5.6 4.1

South Atlantic.................................................... 21.7 6.2 6.5 4.0 2.9 2.0

East South Central............................................ 6.9 2.1 2.1 1.1 1.2 0.5

West South Central........................................... 12.1 3.2 3.9 1.8 1.5 1.6

West..................................................................... 24.2 5.7 7.4 3.9 4.0 3.2

Mountain........................................................... 7.6 1.5 2.9 1.2 1.1 0.9

Pacific............................................................... 16.6 4.2 4.5 2.7 2.9 2.3

Urban/Rural Location (as Self-Reported)

City....................................................................... 47.1 14.7 12.8 7.6 6.8 5.2

Town..................................................................... 19.0 5.1 6.1 3.0 2.6 2.2

Suburbs................................................................ 22.7 5.1 7.5 3.8 3.3 2.9

Rural..................................................................... 22.3 5.1 8.5 3.9 3.1 1.8

Climate Zone1

Less than 2,000 CDD and--

Greater than 7,000 HDD.................................... 10.9 2.6 4.3 1.8 1.2 1.0

5,500 to 7,000 HDD........................................... 26.1 7.9 7.7 4.2 3.7 2.6

4,000 to 5,499 HDD........................................... 27.3 7.3 8.2 4.8 4.0 3.0

Less than 4,000 HDD........................................ 24.0 6.5 7.1 3.9 3.9 2.5

2000 CDD or More and--

Less than 4,000 HDD........................................ 22.8 5.8 7.5 3.7 2.9 2.8

Type of Housing Unit

Single-Family Detached.................................... 72.1 14.8 24.8 12.3 11.1 9.2

Single-Family Attached...................................... 7.6 2.4 2.1 1.2 1.2 0.6

Apartments in 2-4 Unit Buildings....................... 7.8 2.6 2.0 1.6 0.9 0.7

Apartments in 5 or More Unit Buildings............. 16.7 7.9 4.2 2.2 1.6 0.8

Mobile Homes................................................... 6.9 2.4 1.7 1.2 1.0 0.7

Ownership of Hosuing Unit

Owned.................................................................. 78.1 18.6 26.8 12.8 11.5 8.3

Single-Family Detached.................................... 64.1 13.2 22.9 10.7 9.8 7.4

Single-Family Attached...................................... 4.2 1.4 1.3 0.5 0.6 0.3

Apartments in 2-4 Unit Buildings....................... 1.8 0.7 0.5 0.4 Q Q

Apartments in 5 or More Unit Buildings............. 2.3 1.3 0.7 Q Q Q

Mobile Homes................................................... 5.7 2.1 1.4 1.0 0.9 0.4

Rented.................................................................. 33.0 11.4 8.0 5.6 4.3 3.7

Single-Family Detached.................................... 8.0 1.6 1.9 1.5 1.3 1.7

Single-Family Attached...................................... 3.4 1.0 0.8 0.7 0.6 0.3

Apartments in 2-4 Unit Buildings....................... 5.9 1.9 1.5 1.2 0.7 0.6

Apartments in 5 or More Unit Buildings............. 14.4 6.6 3.5 1.9 1.6 0.8

Mobile Homes................................................... 1.2 0.3 0.3 0.2 Q Q

Housing 

Units 

(millions)

Number of Households With --

3

 Members

Table HC6.1 Housing Unit Characteristics by Number of Household Members, 2005

 Million U.S. Housing Units

Housing Unit Characteristics

1

 Member

2

 Members

4

 Members

5 or More 

Members

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Housing 

Units 

(millions)

Number of Households With --

3

 Members

Table HC6.1 Housing Unit Characteristics by Number of Household Members, 2005

 Million U.S. Housing Units

Housing Unit Characteristics

1

 Member

2

 Members

4

 Members

5 or More 

Members

Year of Construction

Before 1940.......................................................... 14.7 4.6 4.3 2.5 1.9 1.3

1940 to 1949......................................................... 7.4 2.5 1.9 1.3 0.8 0.8

1950 to 1959......................................................... 12.5 3.7 4.4 1.7 1.5 1.2

1960 to 1969......................................................... 12.5 3.2 4.1 1.9 1.6 1.7

1970 to 1979......................................................... 18.9 5.4 5.9 2.9 3.0 1.7

1980 to 1989......................................................... 18.6 5.5 5.3 3.5 2.5 1.8

1990 to 1999......................................................... 17.3 3.7 5.5 2.8 3.1 2.3

2000 to 2005......................................................... 9.2 1.6 3.4 1.6 1.4 1.2

Number of Stories in

Single-Family Homes

1 Story.................................................................. 46.7 11.7 17.3 7.0 5.9 4.9

2 Stories................................................................ 28.0 5.0 8.0 5.5 5.4 4.2

3 or More Stories.................................................. 2.5 0.2 0.8 0.5 0.5 0.5

Split-level.............................................................. 1.9 Q 0.7 0.4 0.4 0.3

Other..................................................................... 0.5 QQQQN

Not Asked............................................................. 31.4 12.9 8.0 4.9 3.6 2.2

Number of Floors in Apartment

Buildings with 5 or More Units

1 or 2 Floors.......................................................... 8.2 3.8 2.0 1.1 0.9 0.3

3 or 4 Floors.......................................................... 6.0 2.6 1.6 0.8 0.6 0.4

5 to 10 Floors........................................................ 1.6 0.9 0.5 Q Q Q

11 to 20 Floors...................................................... 0.6 QQQQQ

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

Not Asked............................................................. 94.4 22.2 30.6 16.2 14.2 11.2

Major Outside Wall Construction

Siding (Aluminum, Vinyl, Steel)............................. 35.3 9.2 10.7 5.7 5.6 4.0

Brick...................................................................... 31.3 9.4 9.9 4.8 4.1 3.1

Wood.................................................................... 20.0 5.5 6.3 3.6 2.4 2.2

Stucco................................................................... 14.8 3.4 4.7 2.4 2.5 1.9

Concrete/Concrete Block...................................... 5.3 1.5 1.8 1.0 0.7 0.4

Composition (Shingle)........................................... 1.9 0.5 0.5 0.5 Q 0.2

Stone.................................................................... 1.0 Q 0.4 Q Q Q

Other..................................................................... 1.5 0.4 0.6 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 7.5 11.9 6.2 5.8 4.0

Crawlspace........................................................... 25.1 6.1 8.5 4.5 3.6 2.4

Concrete Slab....................................................... 40.2 8.1 13.1 6.9 6.3 5.7

Not Asked (Mobile Homes and

Apartments in Buildings

With 5 or More Units)........................................ 23.7 10.3 5.9 3.3 2.7 1.5

Fuels Used for Any Use

(more than one may apply)

Electricity.............................................................. 111.1 30.0 34.8 18.4 15.9 12.0

Natural Gas........................................................... 69.5 18.3 21.1 11.5 10.3 8.3

Wood.................................................................... 14.4 2.6 5.3 2.9 2.5 1.2

Fuel Oil................................................................. 8.4 2.1 2.8 1.6 1.1 0.8

LPG...................................................................... 12.6 2.7 4.7 2.0 2.0 1.3

Kerosene.............................................................. 1.7 0.6 0.4 0.3 Q Q

Solar..................................................................... 0.2 N Q Q Q N

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
Housing 

Units 

(millions)

Number of Households With --

3

 Members

Table HC6.1 Housing Unit Characteristics by Number of Household Members, 2005

 Million U.S. Housing Units

Housing Unit Characteristics

1

 Member

2

 Members

4

 Members

5 or More 

Members

Main Heating Fuel

Natural Gas........................................................... 58.2 15.6 18.0 9.5 8.4 6.7

Electricity.............................................................. 33.7 9.9 10.1 5.4 4.7 3.5

Fuel Oil................................................................. 7.7 2.0 2.5 1.6 1.0 0.7

LPG...................................................................... 6.0 1.3 2.5 0.9 0.9 0.5

Wood.................................................................... 2.9 0.4 1.1 0.6 0.5 0.2

Kerosene.............................................................. 0.7 0.4 QQQQ

Solar..................................................................... Q N Q N N N

Other..................................................................... QQQQQN

None..................................................................... 1.3 0.3 0.3 Q 0.3 0.2

Natural Gas Available

in Neighborhood

Yes....................................................................... 80.5 21.9 24.6 13.3 11.2 9.5

Actually Use Natural Gas.................................. 69.5 18.3 21.1 11.5 10.3 8.3

Do Not Use Natural Gas.................................... 11.1 3.7 3.5 1.8 1.0 1.1

No......................................................................... 30.6 8.1 10.2 5.1 4.6 2.5

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

degree-days. For this report, the heating or cooling degree-days are a measure of how cold or how hot a location is over a period of one 

year, relative to a base temperature of 65 degrees Fahrenheit. 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