FHFA annual index 2017–2025Developmental county indexPermits through August 2026
Hamilton County (100 = first year)United States, rebased to the same startNBER recession
FHFA notes: The FHFA HPI is a broad measure of the movement of single-family house prices. The FHFA HPI is a weighted, repeat-sales index, meaning that it measures average price changes in repeat sales or refinancings on the same properties. FHFA describes its county indexes as developmental and subject to revision. The index does not give a dollar value for any home.
Hamilton County, Illinois, has an FHFA house price index from 2017. Through 2025 it has risen +58.6%, from 100 to 159.
Builders were authorised for 0 housing units in the county in the 12 months to August 2026, 0.0 units per 1,000 residents. Since 1995 the county has authorised 0 units, most in 1995.
+10.4%1 year, 2024–2025Illinois +5.7%
+53.2%5 yearsUS +47.0%
—10 years— a year annualised
—since 2000US +158.3%
0units permitted, 12 months0.0 per 1,000 residents
All columns are FHFA annual all-transactions indexes over the same years.
Decade by decade
Decade
Change
United States
2020s so far (2020–2025)
+53.2%
+47.0%
FHFA reports each index with a value of 100 in its base period, the first year the area has enough transactions (2017 here). A decade's change is the index at the end of the decade divided by the index at the start, so it does not depend on the base year; the United States column covers the same years. Decades before 2017 are not shown.
Peak-to-low declines
Peak
Low
Decline
Peak regained
2017
2018
−5.4%
2020
Building permits
Housing units authorised by building permits in Hamilton County, by month over the latest five years and by year since 1995.
Housing units authorised in Hamilton County by month, latest 12 monthssingle-family2+ unit buildings
Housing units authorised in Hamilton County by month, latest 60 monthssingle-family2+ unit buildings
Housing units authorised in Hamilton County by year, 1995–2025single-family2+ unit buildings
Permits, 12 months to August 2026
Hamilton County
Illinois
United States
Housing units authorised
0
19,157
1,418,086
Units per 1,000 residents
0.0
1.5
4.1
Single-family share
—
56%
63%
Change on previous 12 months
—
−5.7%
−0.1%
Units authorised since 1995
0
1,034,461
43,082,761
Population is the Census Bureau's vintage 2025 estimate. Permits authorise construction; they are not completions.
ZIP codes in Hamilton County
Ranked by ten-year change in the FHFA ZIP index. Where a ZIP's index ends before 2025, its spans end in that year.
1 ZIP code has fewer than ten years of index history.
Questions and answers
How much have home values in Hamilton County risen over 10 years?
The county index does not cover ten full years ending 2025; since 2017 it has risen +58.6%.
How does Hamilton County compare with Illinois and the United States?
Over the ten years to 2025: Hamilton County —, Illinois +64.6%, United States +85.0%.
What happened to Hamilton County prices in 2008?
The county index shows no decline of 5% or more from a 2005–2008 peak. The Illinois index fell −23.2% over 2007–2012.
How many homes are being built in Hamilton County?
0 housing units were authorised by building permits in the 12 months to August 2026 (0 single-family, 0 in buildings of five or more units), or 0.0 per 1,000 residents against 1.5 for Illinois.
Where does this data come from?
The index is FHFA's annual county house price index (all-transactions, developmental), last updated March 31, 2026, with values through 2025. Permits are from the Census Bureau Building Permits Survey through August 2026; population is the Census Bureau's vintage 2025 estimate.
Provenance
Index: Federal Housing Finance Agency, annual house price index for counties (all-transactions, developmental), last updated March 31, 2026, values 2017–2025; metro, state and national comparisons from FHFA's annual indexes in the same release. Permits: Census Bureau Building Permits Survey, county and place files, through August 2026. Population: Census Bureau vintage 2025 estimates. ZIP assignment: 2020 ZCTA-to-county relationship file. Public domain throughout. Corrections · FHFA HPI datasets · Building Permits Survey.