Washington: Value of owner occupied housing Note: The Consumer Price Index (CPI) is a measure of inflation. Here we adjusted dollar values by the CPI-U, which is the most commonly used CPI. Using the CPI to put dollar values in “real” terms makes it easier to see “inflation-free” change over time. Our base year is 2021, which means all dollar values are in terms of 2021 dollars. For more information, see (https://www.bls.gov/cpi/home.htm) These ACS data are estimates based on a five-year average, meaning that data gathered from 2017, 2018, 2019, 2020, and 2021 are averaged together to come up with the results shown here. There is no problem with comparing these data to census data from 2000. For a technical discussion of the "margins of error" associated with ACS estimates, please see: (https://www.census.gov/programs-surveys/acs/library/handbooks/researchers.html) Source: 1980, 1990: U.S. Bureau of the Census, Census of Population and Housing, (https://www.census.gov/programs-surveys/decennial-census/data/tables.1980.html); 2000, 2009-2020: U.S. Bureau of the Census, (https://data.census.gov/cedsci/advanced); DATE LAST UPDATED: April 26, 2023; CPI updated February 23, 2022.