Index change and building permits for the year, with every county.
In 2016 the FHFA house price index for Illinois changed +2.8%, against +5.3% for the United States and +3.0% in 2015.
22,603 housing units were authorised by building permits in the state that year (10,187 single-family), +15.5% on 2015; the national total was 1,206,642.
+2.8%Illinois index, 2015–2016US +5.3%
22,603housing units permitted in 201610,187 single-family
77 of 96counties with a rising indexmedian county +1.9%
Ranked by the county index change from 2015 to 2016 (FHFA annual county index). Permits are units authorised in 2016; 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.