Yardi Matrix Apartment Data Reliability

We understand our role is to provide the highest possible standard of data quality. We also recognize that research of any type primary research compiled by Yardi Matrix’s research department, or reference to secondary research studies – is subject to sampling and non-sampling error.

Addressing that condition, our information is updated throughout every business day, then uploaded every evening into the base you access. While our service operates to a statistical 95% confidence level, we also recognize that some things change, dictating that inevitable data errors require monitoring. Internal procedures directly addressing data quality include:

A full-time quality assurance group monitors ongoing data input accuracy.

A dedicated link connects our subscribers to our Customer Service Group which serves as your liaison with our research group, dealing with any questions or needs related to error correction. Error notifications are addressed immediately; our standard for response to correction needs is within 72 hours.

Scheduled mailings are sent to both management companies and owners to confirm owner/management address and contact correctness.

Data points directly affecting information subject to frequent change – ownership; management; the development conduit, and; sales – are updated daily.

Yardi Matrix full-market surveys, conducted three times annually, reflect accuracy to a 95% confidence level; monthly stratified surveys are conducted at a 90%confidence level.

Primary research studies survey the full 50+ unit apartment universe, subject to certain restrictive parameters described under each research category included in “How We Report”, “How We Define” and “How We Rate” with various associated activities required to maintain data to a currently representative condition.

Vacancy information, when available, is purchased from outside sources, and for-the-most-part, is compiled through random, and/or stratified random, sample surveys.

Surveys completed by Yardi Matrix – regularly scheduled, or ongoing – include:

Investor & Developer Market Conditions

Change in conditions resulting from investor and development activity is monitored constantly, reported daily;

Sales Activity Ongoing
Supply Development Ongoing
Supply Description Ongoing


Rental market conditions – rental rate change and rental concessions participation – are surveyed at two levels:












Controlled, Stratified Sample





Full 50+ Property Universe


Three Times Annually*




*The full property universe survey is conducted during the January/February, May/June and September/October periods.


For a description of how individual surveys are conducted, reference individual categories under the Sources and Methods menu on this page.