Total......................................................................... 111.1 10.9 26.1 27.3 24.0 22.8

Census Region and Division

Northeast............................................................... 20.6 1.9 9.8 8.9 N N

New England...................................................... 5.5 1.3 4.1 Q N N

Middle Atlantic.................................................... 15.1 Q 5.7 8.8 N N

Midwest................................................................. 25.6 6.9 12.3 6.4 N N

East North Central.............................................. 17.7 4.9 9.9 3.0 N N

West North Central............................................ 7.9 Q Q 3.4 N N

South..................................................................... 40.7 N Q 8.5 11.5 19.9

South Atlantic..................................................... 21.7 N Q 5.8 7.0 8.0

East South Central............................................. 6.9 N N 1.8 2.9 2.2

West South Central............................................ 12.1 N N Q 1.6 9.7

West...................................................................... 24.2 2.1 3.1 3.5 12.4 2.9

Mountain............................................................ 7.6 1.7 2.0 Q Q 2.4

Pacific................................................................ 16.6 0.4 Q 2.6 12.0 0.5

Urban/Rural Location (as Self-Reported)2

City........................................................................ 47.1 3.4 8.9 11.5 11.9 11.4

Town...................................................................... 19.0 2.5 5.8 5.2 2.4 3.1

Suburbs................................................................. 22.7 1.4 6.6 5.6 4.7 4.4

Rural...................................................................... 22.3 3.7 4.8 5.0 5.0 3.9

Type of Housing Unit

Single-Family Detached..................................... 72.1 8.1 16.6 16.4 15.5 15.5

Single-Family Attached...................................... 7.6 0.8 2.0 2.5 1.6 0.7

Apartments in 2-4 Unit Buildings........................ 7.8 0.4 2.3 2.3 1.5 1.2

Apartments in 5 or More Unit Buildings.............. 16.7 0.9 4.0 4.8 3.6 3.4

Mobile Homes.................................................... 6.9 0.7 1.2 1.3 1.8 2.0

Ownership of Housing Unit

Owned.................................................................. 78.1 8.6 18.5 18.4 16.4 16.3

Single-Family Detached..................................... 64.1 7.2 15.0 14.9 13.5 13.4

Single-Family Attached...................................... 4.2 Q 1.2 1.4 0.6 0.3

Apartments in 2-4 Unit Buildings........................ 1.8 Q 0.8 0.6 Q Q

Apartments in 5 or More Unit Buildings.............. 2.3 Q 0.4 0.5 0.7 0.6

Mobile Homes.................................................... 5.7 0.5 1.1 1.0 1.5 1.7

Rented.................................................................. 33.0 2.3 7.6 8.9 7.6 6.5

Single-Family Detached..................................... 8.0 0.8 1.6 1.5 2.0 2.1

Single-Family Attached...................................... 3.4 0.3 0.7 1.1 0.9 0.4

Apartments in 2-4 Unit Buildings........................ 5.9 0.3 1.5 1.7 1.4 1.0

Apartments in 5 or More Unit Buildings.............. 14.4 0.8 3.6 4.3 2.9 2.8

Mobile Homes.................................................... 1.2 Q Q 0.3 0.4 Q

Year of Construction3

1939 or Before....................................................... 14.7 2.0 5.4 4.8 1.7 0.9

1940 to 1949.......................................................... 7.4 0.4 2.3 2.0 1.8 0.9

1950 to 1959.......................................................... 12.5 1.1 3.6 3.2 2.6 2.0

1960 to 1969.......................................................... 12.5 1.0 2.8 3.5 2.5 2.7

1970 to 1979.......................................................... 18.9 2.0 4.1 3.7 4.7 4.4

1980 to 1989.......................................................... 18.6 1.6 2.9 4.3 5.1 4.6

1990 to 1999.......................................................... 17.3 1.8 3.2 4.4 3.7 4.3

2000 to 2005.......................................................... 9.2 1.2 1.8 1.2 1.9 3.1

4,000 to 

5,499 HDD

Less than 

4,000 HDD

Table HC9.1 Housing Unit Characteristics by Climate Zone, 2005

 Million U.S. Housing Units

Less than 2,000 CDD and --

Climate Zone1

2,000 CDD 

or More

and Less 

than 4,000 

Housing Unit Characteristics HDD

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

Housing 

Units 

(millions)

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
4,000 to 

5,499 HDD

Less than 

4,000 HDD

Table HC9.1 Housing Unit Characteristics by Climate Zone, 2005

 Million U.S. Housing Units

Less than 2,000 CDD and --

Climate Zone1

2,000 CDD 

or More

and Less 

than 4,000 

Housing Unit Characteristics HDD

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

Housing 

Units 

(millions)

Number of Stories

Single-Family Homes

1 Story............................................................... 46.7 4.2 8.7 9.2 11.0 13.5

2 Stories............................................................. 28.0 3.7 8.0 8.5 5.2 2.5

3 or More Stories................................................ 2.5 0.3 0.9 0.8 0.4 Q

Split-level........................................................... 1.9 0.5 0.8 0.4 Q N

Other.................................................................. 0.5 Q 0.3 Q Q N

Not Asked.......................................................... 31.4 2.1 7.5 8.4 6.9 6.6

Number of Floors in Apartment

Buildings with 5 or More Units

1 or 2 Floors.......................................................... 8.2 0.4 1.6 1.6 2.5 2.0

3 or 4 Floors.......................................................... 6.0 0.5 1.9 1.7 1.0 0.8

5 to 10 Floors......................................................... 1.6 N 0.3 0.9 Q 0.3

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

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

Not Asked.............................................................. 94.4 10.0 22.1 22.5 20.3 19.4

Major Outside Wall Construction

Siding (Aluminum, Vinyl, Steel).............................. 35.3 5.4 11.1 10.3 5.1 3.5

Brick...................................................................... 31.3 1.1 8.2 9.9 4.5 7.6

Wood..................................................................... 20.0 3.3 5.1 3.9 4.5 3.2

Stucco................................................................... 14.8 0.5 0.5 1.2 9.1 3.5

Concrete/Concrete Block....................................... 5.3 Q Q 0.6 Q 4.3

Composition (Shingle)........................................... 1.9 Q 0.5 0.6 0.5 Q

Stone..................................................................... 1.0 Q 0.2 0.3 Q Q

Other..................................................................... 1.5 0.3 0.3 0.5 Q 0.3

Foundation/Basement of SingleFamily Units and Apartments in

2 to 4 Unit Buildings

(more than one may apply)

Basement.............................................................. 35.5 7.1 14.1 11.5 2.5 0.3

Crawlspace............................................................ 25.1 1.9 5.8 7.2 7.3 2.8

Concrete Slab........................................................ 40.2 2.5 6.2 6.9 10.5 14.1

Not Asked (Mobile Homes and

Apartments in Buildings

With 5 or More Units)......................................... 23.7 1.6 5.2 6.0 5.5 5.4

Fuels Used for Any Use

(more than one may apply)

Electricity............................................................... 111.1 10.9 26.1 27.3 24.0 22.8

Natural Gas........................................................... 69.5 6.9 19.1 17.9 15.9 9.7

Wood..................................................................... 14.4 2.4 2.7 3.6 3.5 2.2

Fuel Oil.................................................................. 8.4 1.7 3.0 3.4 Q Q

LPG....................................................................... 12.6 2.1 2.8 2.4 3.3 2.0

Kerosene............................................................... 1.7 Q 0.6 0.5 0.4 Q

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

Energy Information Administration

2005 Residential Energy Consumption Survey: Preliminary Housing Characteristics Tables
4,000 to 

5,499 HDD

Less than 

4,000 HDD

Table HC9.1 Housing Unit Characteristics by Climate Zone, 2005

 Million U.S. Housing Units

Less than 2,000 CDD and --

Climate Zone1

2,000 CDD 

or More

and Less 

than 4,000 

Housing Unit Characteristics HDD

Greater than 

7,000 HDD

5,500 to 

7,000 HDD

Housing 

Units 

(millions)

Main Space Heating Fuel

Natural Gas........................................................... 58.2 6.2 17.6 14.9 12.6 6.9

Electricity............................................................... 33.7 1.0 3.3 7.1 8.1 14.1

Fuel Oil.................................................................. 7.7 1.5 2.9 3.1 Q N

LPG....................................................................... 6.0 1.3 1.2 1.0 1.9 0.6

Wood..................................................................... 2.9 0.7 0.4 0.8 0.6 0.4

Kerosene............................................................... 0.7 Q Q Q Q Q

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

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

None...................................................................... 1.3 Q Q N 0.3 0.8

Natural Gas Available

in Neighborhood

Yes........................................................................ 80.5 7.7 21.2 20.6 18.3 12.8

Actually Use Natural Gas................................... 69.5 6.9 19.1 17.9 15.9 9.7

Do Not Use Natural Gas..................................... 11.1 0.8 2.1 2.7 2.4 3.1

No.......................................................................... 30.6 3.2 4.9 6.7 5.7 10.0

 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.

 2. Based on the household respondent’s description rather than the Federal Government definition.

 3. New construction for 2005 includes only those housing units built and occupied between January and the August-December period 

when the household interviews were conducted.

 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