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Housing Vacancies and Homeownership (CPS/HVS)
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Annual Statistics: 2007
APPENDIX A. DEFINITIONS AND EXPLANATIONS
Metropolitan Areas. Definitions and Explanations
The United States Office of Management and Budget (OMB) defines metropolitan and micropolitan statistical areas
according to published standards that are applied to Census Bureau data. The general concept of a metropolitan or
micropolitan statistical area is that of a core area containing a substantial population nucleus, together with adjacent
communities having a high degree of economic and social integration with that core.
Due to the new sample drawn from Census 2000, metropolitan/nonmetropolitan data published in 2005 and later
are not directly comparable to data for 2004 and earlier. The 2005 metropolitan area data reflect new definitions as
defined by OMB, while data for 2004 and earlier (back to 1995) reflect 1990 metropolitan/nonmetropolitan area
definitions.
Currently defined metropolitan and micropolitan statistical areas are based on application of 2000 standards, (which
appeared in the Federal Register on December 27, 2000) to Census 2000 data. Current metropolitan and
micropolitan statistical area definitions were announced by OMB effective June 6, 2003. Standard definitions of
metropolitan areas were first issued in 1949 by the then Bureau of the Budget (predecessor of OMB), under the
designation "standard metropolitan area" (SMA). The term was changed to "standard metropolitan statistical area"
(SMSA) in 1959, and to "metropolitan statistical area" (MSA) in 1983.
The term "metropolitan area" (MA) was adopted in 1990 and referred collectively to metropolitan statistical areas
(MSAs), consolidated metropolitan statistical areas (CMSAs), and primary metropolitan statistical areas (PMSAs).
The term "core based statistical area" (CBSA) became effective in 2000 and refers collectively to metropolitan and
micropolitan statistical areas.
OMB has been responsible for the official metropolitan areas since they were first defined, except for the period
1977 to 1981, when they were the responsibility of the Office of Federal Statistical Policy and Standards,
Department of Commerce. The standards for defining metropolitan areas were modified in 1958, 1971, 1975, 1980,
1990, and 2000.
Defining Metropolitan and Micropolitan Statistical Areas. The 2000 standards provide that each CBSA must contain
at least one urban area of 10,000 or more population. Each metropolitan statistical area must have at least one
urbanized area of 50,000 or more inhabitants. Each micropolitan statistical area must have at least one urban cluster
of at least 10,000 but less than 50,000 population.
Under the standards, the county (or counties) in which at least 50 percent of the population resides within urban
areas of 10,000 or more population, or that contain at least 5,000 people residing within a single urban area of
10,000 or more population, is identified as a "central county" (counties). Additional "outlying counties" are included
in the CBSA if they meet specified requirements of commuting to or from the central counties. Counties or
equivalent entities form the geographic "building blocks" for metropolitan and micropolitan statistical areas
throughout the United States and Puerto Rico. If specified criteria are met, a metropolitan statistical area containing
a single core with a population of 2.5 million or more may be subdivided to form smaller groupings of counties
referred to as "metropolitan divisions."
As of June 6, 2000, there are 362 metropolitan statistical areas and 560 micropolitan statistical areas in the United
States.
Principal Cities and Metropolitan and Micropolitan Statistical Area. The largest city in each metropolitan or
micropolitan statistical area is designated a "principal city." Additional cities qualify if specified requirements are
met concerning population size and employment. The title of each metropolitan or micropolitan statistical area
consists of the names of up to three of its principal cities and the name of each state into which the metropolitan or
micropolitan statistical area extends. Titles of metropolitan divisions also typically are based on principal city names
but in certain cases consist of county names.
Defining New England City and Town Areas. In view of the importance of cities and town in New England, the
2000 standards also provide for a set of geographic areas that are defined using cities and towns in the six New
England states. The New England city and town areas (NECTAs) are defined using the same criteria as metropolitan
and micropolitan statistical areas and are identified as either metropolitan or micropolitan, based, respectively, on
the presence of either an urbanized area of 50,000 or more population or an urban cluster of at least 10,000 but less
than 50,000 population. If the specified criteria are met, a NECTA containing a single core with a population of at
least 2.5 million may be subdivided to form smaller groupings of cities and towns referred to as New England city
and town area divisions.
Changes in Definitions over Time. Changes in the definitions of these statistical areas since the 1950 census have
consisted chiefly of: the recognition of new areas as they reached the minimum required city or urbanized area
population, and the addition of counties (or cities and towns in New England) to existing areas as new decennial
census data showed them to qualify. In some instances, formerly separate areas have been merged, components of
an area have been transferred from one area to another, or components have been dropped from an area. The large
majority of changes have taken place on the basis of decennial census data. However, Census Bureau data serve as
the basis for intercensal updates in specified circumstances.
Geographic regions. The four major regions of the United States for which data are presented in this report
represent groups of States as follows:
Northeast: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, New Jersey, New York,
Pennsylvania.
Midwest: Illinois, Indiana, Michigan, Ohio, Wisconsin, Iowa, Kansas, Minnesota, Missouri, Nebraska, North
Dakota, South Dakota.
South: Delaware, District of Columbia, Florida, Georgia, Maryland, North Carolina, South Carolina, Virginia,
West Virginia, Alabama, Kentucky, Mississippi, Tennessee, Arkansas, Louisiana, Oklahoma, Texas.
West: Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, Wyoming, Alaska, California, Hawaii,
Oregon, Washington.
Housing Unit. A housing unit is a house, an apartment, a group of rooms, or a single room occupied or intended
for occupancy as separate living quarters. Separate living quarters are those in which the occupants do not live and
eat with other persons in the structure and which have direct access from the outside of the building or through a
common hall. For vacant units, the criteria of separateness and direct access are applied to the intended occupants
whenever possible. If the information cannot be obtained, the criteria are applied to the previous occupants. Tents
and boats are excluded if vacant, used for business, or used for extra sleeping space or vacations. Vacant
seasonal/migratory mobile homes are included in the count of vacant seasonal/migratory housing units.
Living quarters of the following types are excluded from the housing unit inventory: Dormitories, bunkhouses,
and barracks; quarters in predominantly transient hotels, motels, and the like, except those occupied by persons who
consider the hotel their usual place of residence; quarters in institutions, general hospitals, and military installations
except those occupied by staff members or resident employees who have separate living arrangements.
Occupied Housing Units. A housing unit is occupied if a person or group of persons is living in it at the time
of the interview or if the occupants are only temporarily absent, as for example, on vacation. The persons living
in the unit must consider it their usual place of residence or have no usual place of residence elsewhere. The count
of occupied housing units is the same as the count of households.
Householder. The householder refers to the person (or one of the persons) in whose name the housing unit is
owned or rented or, if there is no such person, any adult member, excluding roomers, boarders, or paid employees.
If the house is jointly owned by a married couple, either the husband or the wife may be listed first, thereby
becoming the reference person, or householder, to whom the relationship of the other household members is
recorded. One person in each household is designated as the "householder."
Vacant Housing Units. A housing unit is vacant if no one is living in it at the time of the interview, unless
its occupants are only temporarily absent. In addition, a vacant unit may be one which is entirely occupied by
persons who have a usual residence elsewhere.
New units not yet occupied are classified as vacant housing units if construction has reached a point where all
exterior windows and doors are installed and final usable floors are in place. Vacant units are excluded if they are
exposed to the elements, that is, if the roof, walls, windows, or doors no longer protect the interior from the
elements, or if there is positive evidence (such as a sign on the house or block) that the unit is to be demolished or
is condemned. Also excluded are quarters being used entirely for nonresidential purposes, such as a store or an
office, or quarters used for the storage of business supplies or inventory, machinery, or agricultural products.
Vacant sleeping rooms in lodging houses, transient accommodations, barracks, and other quarters not defined as
housing units are not included in the statistics in this report. (See section on "Housing Unit.")
Year-round Vacant Units. Beginning in 1990, year-round vacant mobile homes were included as part of the
year-round vacant count of housing units. Year-round units are those intended for occupancy at any time of the year,
even though they may not be in use the year round. In resort areas, a housing unit which is usually occupied on a
year-round basis is considered a year-round unit. As indicated above, year-round units temporarily occupied by
persons with usual residence elsewhere are included with year-round vacant units.
Year-round vacant units are classified in the following categories:
Vacant units for rent. This group consists of vacant units offered for rent and those offered both for rent and sale.
Vacant units for sale only. This group is limited to units for sale only; it excludes units both for rent and sale. If
a unit was located in a multi-unit structure which was for sale as an entire structure and if the unit was not for rent,
it was reported as "held off market." However, if the individual unit was intended to be occupied by the new owner,
it was reported as "for sale."
Vacant units rented or sold. This group consists of year-round vacant units which have been rented or sold but the
new renters or owners have not moved in as of the day of interview.
Vacant units held off the market. Included in this category are units held for occasional use, temporarily occupied
by persons with usual residence elsewere, and vacant for other reasons. These classifications are described below.
For occasional use. If the vacant unit is not for-rent or for-sale-only but is held for weekends or occasional use
thoughout the year, the unit is included in this catagory. Time-shared units are classified in this category if the
vacant unit is not for-rent or for-sale-only, but held for use for an individual during the time of interview.
Units Occupied by Persons With Usual Residence Elsewhere. A housing unit which is occupied temporarily by
persons who usually live elsewhere is interviewed as a vacant unit provided that a usual place of residence is held
for the household which is not offered for rent or for sale. For example, a beach cottage occupied at the time of the
interview by a family which has a usual place of residence in the city is included in the count of vacant units. Their
house in the city would be reported "occupied" and would be included in the count of occupied units since the
occupants are only temporarily absent. Units occupied by persons with usual residence elsewhere (URE) are further
classified as seasonal vacant or year round vacant units. Seasonal URE's are included with all seasonal vacant units.
Other vacant. Included in this category are year-round units which were vacant for reasons other than those
mentioned above: For example, held for occupancy of a caretaker, janitor; held for settlement of an estate, or held
for personal reasons of the owner.
Seasonal Vacant Units. Seasonal housing units are those intended for occupancy only during certain seasons
of the year and are found primarily in resort areas. Housing units held for occupancy by migratory labor employed
in farm work during the crop season are tabulated as seasonal. As of the first quarter 1986 vacant seasonal mobile
homes are being counted as a part of the seasonal housing inventory.
Rental Vacancy Rate. The rental vacancy rate is the proportion of the rental inventory which is vacant for
rent. In table 1, the rates are computed using the following formula:
Vacant
year-round
units
Rental for rent
vacancy = __________________________________________________________________________
rate
(table 1) Renter Vacant Vacant
occupied + year-round + year-round
units units rented units
but awaiting for rent
occupancy
Rental Vacancy Rates by Selected Characteristics. The rental vacancy rates shown in table 2 are the
percent relationship of the vacant year-round units for rent with a specific characteristic (such as 3-room units) to
all rental units with that specific characteristic. Excluded from the denominator are year-round units rented but
awaiting occupancy. The rates are computed as follows:
All vacant year-round units for rent
Rental vacancy rate with a specific characteristic
for a specific = ______________________________________________
characteristic
(table 2) All renter occupied and vacant
year-round units for rent with a
specific characteristic
For example, the numerator for the rental vacancy rate for units with 3 rooms is all vacant year-round for rent units
with 3 rooms. The denominator is: (1) all renter occupied units with 3 rooms and (2) vacant year-round units for
rent with 3 rooms.
Homeowner Vacancy Rate. The homeowner vacancy rate is the proportion of the homeowner inventory
which is vacant for sale. In table 1, the rates are computed using the following formula:
Vacant
year-round
units
Homeowner for sale only
vacancy = ______________________________________________________________________
rate
(table 1) Owner Vacant Vacant
occupied + year-round + year-round
units units sold units
but awaiting for sale only
occupancy
Homeowner Vacancy Rates by Selected Characteristics. The homeowner vacancy rates shown in
table 2 are the percent relationship of the vacant year-round units for sale with a specific characteristic (such as
3-room units) to all homeowner units with that specific characteristic. Excluded from the denominator are
year-round units sold but awaiting occupancy. The rates are computed as follows:
all vacant year-round units for sale
Homeowner vacancy with a specific characteristic
rate for a specific = _____________________________________________________
characteristic
(table 2) all owner occupied and vacant
year-round units for sale with a
specific characteristic
For example, the numerator for the homeowner vacancy rate for
units with 3 rooms is all vacant year-round units for sale only
with 3 rooms.
The denominator is: (1) all owner occupied units with 3 rooms
and (2) vacant year-round units for sale with 3 rooms.
Other Occupancy and Vacancy Rates. The percent distribution vacant and occupied housing units,
shown in tables 7 and 8, are shown as a percent of all housing units and are computed using the following formula.
Type of unit
Rate = ________________________
All housing units
For example, the numerator for the for-rent rate is all year-round vacant units for rent. The denominator is all
housing units.
Number of Rooms. Included in the count of rooms were whole rooms such as living rooms, dining rooms,
bedrooms, kitchens, finished basements or attics, recreation rooms, permanently enclosed sun porches which are
suitable for year-round use, and lodger's rooms. A partially divided room, such as dinette next to a kitchen or living
room was counted as a separate room only if there was a partition from floor to ceiling, but was not counted as a
room if the partition consisted solely of shelves or cabinets. Not included in the count of rooms were bathrooms,
halls, foyers or vestibules, balconies, closets, alcoves, pantries, strip or pullman kitchens, laundry or furnace rooms,
unfinished attics or basements, open porches, sun porches not suited for year-round use, unfinished space used for
storage, mobile homes or trailers used only as bedrooms, and offices used only by persons not living in the unit.
A room used by the occupants of more than one unit was included with the unit from which it could be most easily
reached.
The median number of rooms is the theoretical value which divides the housing units equally, one-half having
more rooms and one-half having fewer rooms than the median. In the computation of the median, a continuous
distribution was assumed. For example, when the median was in the three-room group, the lower and upper limits
were assumed to be 2.5 and 3.5, respectively. Tenths were used in the computation of the median to permit
comparisons.
Number of Bedrooms. Rooms used mainly for sleeping, even if used for other purposes, were counted as
bedrooms. Also included in the count of bedrooms were rooms reserved for sleeping, such as guest rooms, even
though used infrequently. A room used mainly for other purposes, although also used for sleeping, such as a living
room with a hide-away bed, was not counted as a bedroom. A one-room apartment, therefore, was reported as
having no bedroom.
Number of Housing Units in Structure. A structure is a separate building which either has open space
on all four sides or is separated from other structures by dividing walls that extend from ground to roof. In double
houses, row houses, and houses attached to nonresidential structures, each building is a structure if the common wall
between them goes from ground to roof. Sheds and private garages which adjoin houses are not counted as separate
structures. In apartment developments, each building with open space on all sides is considered a separate structure.
The count of housing units in a structure is the total number of units in the structure, both occupied and vacant units.
In the tabulations, occupied mobile homes or trailers, tents, and boats are included in the category one housing unit
in structure.
The statistics reflect the number of housing units in the structure in which they are located, rather than the number
of residential structures. In the quarterly surveys, data were obtained on the number of housing units in the structure,
regardless of the type of structures in which the unit was
located.
Year Structure Built. "Year structure built" refers to the date the original construction of the structure was
completed, and not to any later remodeling, addition, or conversion. The figures on the number of units built during
a given period relate to the number of units in existence at the time of interview. For both occupied and vacant
mobile homes, "model year" is the year built.
Duration of Vacancy. The length of time a housing unit was vacant was computed from the day the unit
became vacant until the day of the interview. The data, therefore, do not provide a direct measure of the total length
of time units remain vacant. For newly constructed units, the duration of vacancy represents the time period since
the date when the unit was considered a vacant housing unit, that is, when construction had reached the point that
all exterior windows and doors were installed and final usable floors were in place. For recently converted or
merged units, the length of time is reported from the date the conversion or merger was completed. For units
temporarily occupied by persons with a usual residence elsewhere, duration of vacancy is the length of time since
the last usual residents moved; if the unit was always occupied by persons with usual residence elsewhere the
time is reported from the date the unit was originally ready for occupancy.
The time intervals used in the tables represent full months, calculated from a date in the month to the same date
the following month. For example, if the unit became vacant on July 29 and was still vacant on the day interviewed,
September 20, the time reported would be "1 to 2 months," meaning that the unit had been vacant for more than 1
month but less than 2 months. Or if the unit became vacant on August 25 and was still vacant on September 20,
the time reported would be "less than 1 month."
Previous Occupancy. A unit was classified as being "previously occupied" if the unit had ever been occupied
or if the unit was occupied by persons with a usual residence elsewhere. If a previously occupied unit had been
converted into several housing units, each unit was classified as being previously occupied. Also, housing units that
resulted from conversion of
nonresidential space or from a merger was reported as being previously occupied. Only vacant newly constructed
units were classified as "not previously occupied."
Contract Rent. For renter-occupied units, the contract rent is the monthly rent agreed upon regardless of any
furnishings, utilities, or services that may be included. For vacant units, rent is the amount asked for the unit at the
time of interview; the amount may differ from the rent contracted for when the unit is occupied. Data for contract
rent excludes units for which no cash rent is paid. As in the 1980 census, the statistics are limited to specified rental
units. These data exclude rents for renter-occupied and vacant for-rent single-family structures on places of 10 acres
or more.
The median monthly rent is the rent which divides the series into two equal parts, one-half of the units with rents
higher than the median and the other half with rents lower than the median. In the computation of the median, a
continuous distribution was assumed, and the limits of the class intervals were assumed to stand at the midpoint of
the 1-dollar interval between the end of one of the rent groups and the beginning of the next. For example, the limits
of the interval designated $250 to $299 were assumed to be $249.50 and $299.50.
Inclusion of Utilities in Rent. The utilities included in the inquiry were electricity, gas, water, oil, coal,
wood, and kerosene, etc. The statistics reflect whether all or some or none of these utilities are provided for in the
amount of rent asked at the time of the interview. A unit was classified as having "all utilities included" if the cost
of the utilities are included in the rent at no additional cost to the renter or if the utilities would not be used by the
renter. A unit was classified as having "some or none included" if all or part of the utilities are to be paid for
separately by the renter in addition to the rent asked. Data on the inclusion of utilities are limited to vacant units
for which rent is reported. No data on utilities are collected for renter-occupied units.
Value. Value is the respondent's estimate of how much the property would sell for on the current market. For
vacant units, value is the sales price asked for the property at the time of the interview and may differ from the price
at which the property is sold. The "sales price asked" includes the price of a one-housing-unit structure and the land
on which it is located. The "sales price asked" may also include additional structures such as garages, sheds, barns,
etc.
In this report, statistics on value for owner-occupied units and vacant for-sale-only units are limited to specified
homeowner units which includes all one-housing unit structures located on places of less than 10 acres, without a
commercial establishment or medical office on the property and with only one-housing unit on the property.
The median value or sales price is the amount which divides the series into two equal parts, one-half of the units
with values higher than the median and the other half with values lower than the median. The median was computed
on the basis of more detailed tabulation groups than are shown in the tables and was rounded to the nearest hundred
dollars.
Homeownership Rates. The proportion of households that are owners is termed the homeownership rate. It
is computed by dividing the number of households that are owners by the total number of households (table 18).
The formula is as follows:
Owner households
Homeownership rate = ________________________________________________
Total occupied households
Homeownership Rate by Age of Householder. This homeownership rate is calculated by dividing the
number of owner household in a particular age group by the total number of occupied households in that age group
(table 21).
Owner households
Homeownership rate = (in age group)
(For a specific age group) ____________________________________________
Total occupied households
(in age group)
Homeownership Rate by Marital Status. This homeownership rate is calculated by dividing the number
of owner households in a particular category by the total number of households in that category. For example:
Homeownership Married-couple family owner households (in specific age group)
Rate = ___________________________________________________________________
Total married-couple family households (in specific age group)
Family. A family is a group of two persons or more (one of whom is the householder) related by birth, marriage,
or adoption and residing together; all of such persons (including related subfamily members) are considered as
members of one family. Beginning with the 1980 CPS, unrelated subfamilies (referred to in the past as secondary
families) are no longer included in the count of families, nor are the members of unrelated subfamilies included in the
count of family members.
Married-Couple Families. A married couple, as defined for Census purposes, is a husband and wife enumerated
as members of the same household. The married couple may or may not have children living with them. The
expression "husband-wife" or "married-couple" before the term "household," or "family," indicates that the household,
or family, is maintained by a husband and wife.
Other Family Households.
Male Householder no wife present: This category includes households with male householders who are married with
at least one other relative in the household, but with wife absent because of separation or other reason where husband
and wife maintain separate residences; and male householders who are widowed, divorced, or single with at least one
other relative in the household.
Female Householders no husband present: This category includes households with female householders who are
married with one other relative in the household, but with husband absent because of separation or other reason where
husband and wife maintain separate residences; and female householders who are widowed, divorced, or single with
at least one other relative in the household.
Non-family householder. A non-family householder is a person maintaining a household while living alone or
with non-relatives only.
One-person Households. Households consisting of only one person are shown separately for male householder and
female householder under the category "one-person households".
Other Two-or-More-Person Households. Households consisting of a householder living with one or more non-relatives
only. Data are shown separately for male and female householder only.
Single Male Householder. This includes the following 3 categories--other family households-male householder
no wife present, one person male householder, and Nonfamily Other Two-or-More-Person Male Households.
Single Female Householder. This includes the following 3 categories--other family households-female
householder no husband present, one person female householder, and Nonfamily Other Two-or-More-Person female
Households.
Age. The age classification is based on the age of the householder at the time of interview.
Go to Housing Vacancies and Homeownership Annual Statistics: 2007
Contact Bob Callis or Linda Cavanaugh at (301)763-3199 or visit ask.census.gov for further information on the Housing Vacancy Survey.
Source: U.S. Census Bureau, Housing and Household Economic Statistics Division
