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Single-Family Housing Units

Source: U.S. Bureau of the Census, 1990 Census of Housing, Summary Tabulation File 1A. Updated every 10 years. http://venus.census.gov/cdrom/lookup/


A structure is a separate building that either has open spaces on all sides or is separated from other structures by dividing walls that extend from ground to roof. In determining the number of units in a structure, all housing units, both occupied and vacant, are counted. Stores and office space are excluded.

Single-family homes include:

1-Unit, Detached--This is a 1-unit structure detached from any other house; that is, with open space on all four sides. Such structures are considered detached even if they have an adjoining shed or garage. A one-family house that contains a business is considered detached as long as the building has open space on all four sides. Mobile homes or trailers to which one or more permanent rooms have been added or built also are included.

1-Unit, Attached--This is a 1-unit structure that has one or more walls extending from ground to roof separating it from adjoining structures. In row houses (sometimes called townhouses), double houses, or houses attached to nonresidential structures, each house is a separate, attached structure if the dividing or common wall goes from ground to roof.

The percent is calculated by dividing the sum of 1-unit, detached and 1-unit attached by the total number of housing units.

Scope and Methodology:

These data are collected on the census long form. One in every six households received this sample questionnaire. Information of the accuracy of data and sampling is available at http://www.census.gov/td/stf3/append_c.html.

More information:

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