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Appendix B: Determination of Market Status
In San Francisco, units are generally defined as being market-rate (i.e., with rents not regulated by the
Rent Ordinance, or other rules and regulations, and with occupants not receiving government subsidy
to assist with their rent), rent-controlled (subject to the rent restrictions embodied in the Rent
Ordinance, with rent increases are restricted except when a new tenant moves into the unit), or
subsidized or assisted (e.g., public housing). Survey respondents were directly asked whether their
unit was covered by rent control, but as expected, it was not possible to use this question to screen for
market status, since so many respondents were unaware of their unit’s status or clearly were mistaken
about its status relative to the Rent Ordinance.
As a result, BAE used other variables in the data set to determine rent control status. Records were
screened by the year unit was built, unit size, move-in date for single-family and condominium units,
and subsidy status, including whether the unit was in public housing. Based on these criteria, housing
units were classified as rent controlled, market rate, subsidized/assisted, occupied by a parent or child
of the property owner, or undetermined.
Market rate units were units constructed 1980 or later which also showed no subsidy, as well as all
unsubsidized single-family homes and condominiums where the respondent moved in January 1, 1996
or later. It should be noted that this category includes some units subject to the eviction controls in
the San Francisco Rent Ordinance, i.e., the single-family homes and condominiums where the
respondent moved in on January 1, 1996 or later.
Rent controlled units were those meeting the age criteria (built prior to 1980) that also were not
single-family homes or condominiums where the respondent moved in on or after January 1, 1996.
Units which met these above criteria were further sorted and excluded if they were in public housing,
the respondent indicated presence of some other rent subsidy, such as Section 8 voucher, the
respondent was a parent or child of the owner, or the respondent did not answer the questions
regarding subsidy status.
Subsidized units were those where the respondent indicated that the unit was in public housing, that
the unit was owned by a nonprofit or the government, that the respondent’s household received some
kind of assistance from the government in paying rent (e.g., Section 8 voucher), or that their
household was required to verify income to renew the lease (as is the case for tax-credit units).
A small number of respondents indicated that they were parents or children of the unit owner, and
thus not subject to rent control regardless of unit age, or to normal market factors. These units were
given their own category.
In cases where the respondent did not provide adequate information regarding the criteria used to
establish unit type, the respondent unit was classified as undetermined. For example, if the
respondent did not estimate when a unit was built, but it was clear there was no subsidy or assistance,
it was not possible to distinguish between market rate and rent-controlled units.
Additionally, respondents may not have answered all questions accurately, so some respondent units
may be incorrectly classified. As a result, the analysis here should not be considered a definitive
measure of the prevalence of any unit type, but is a rough indicator of the unit mix by market status in
San Francisco.