Index change and building permits for the year, with every county.
In 2019 the FHFA house price index for Illinois changed +2.6%, against +4.2% for the United States and +2.4% in 2018.
20,524 housing units were authorised by building permits in the state that year (8,745 single-family), −4.6% on 2018; the national total was 1,386,048.
+2.6%Illinois index, 2018–2019US +4.2%
20,524housing units permitted in 20198,745 single-family
83 of 97counties with a rising indexmedian county +2.5%
Ranked by the county index change from 2018 to 2019 (FHFA annual county index). Permits are units authorised in 2019; per 1,000 uses the vintage 2025 population.
Housing units authorised in Illinois by yearsingle-family2+ unit buildings
Source: Federal Housing Finance Agency annual state and county house price indexes (updated March 31, 2026); Census Bureau Building Permits Survey annual state and county files. Public domain. Methodology.