Somonauk, IL housing market
The median sale price was $268,000 in May 2026.
Home values, sales, trends and how Somonauk compares with the towns next door — updated as new data is published.
Somonauk at a glance
Only 4 sales in May 2026: in a market this size, monthly medians swing a lot, so the typical value above is the steadier guide.
Home prices up 57% in 5 years
The federal house price index for the ZIP codes around Somonauk rose 57% over the past 5 years, faster than across Illinois (47%). Last year prices rose 8.7%. Carrying the Census median home value forward with that index puts the typical Somonauk home at roughly $389,000 today.
Show as a table
| Year | Change that year | Since 2000 | Illinois since 2000 |
|---|---|---|---|
| 2025 | +8.7% | +115% | +96% |
| 2024 | +17% | +97% | +85% |
| 2023 | +1.4% | +69% | +73% |
| 2022 | +11% | +67% | +61% |
| 2021 | +10% | +51% | +44% |
| 2020 | +1% | +37% | +33% |
| 2019 | +4.9% | +36% | +32% |
| 2018 | +0.6% | +29% | +28% |
| 2017 | +12% | +28% | +25% |
| 2016 | +2.5% | +15% | +22% |
| 2015 | +1.5% | +12% | +19% |
| 2014 | +2.6% | +11% | +15% |
| 2013 | −5.4% | +7.7% | +11% |
| 2012 | −3.5% | +14% | +11% |
| 2011 | −7.9% | +18% | +14% |
| 2010 | −6% | +28% | +21% |
| 2009 | −7.1% | +36% | +29% |
| 2008 | −4.6% | +47% | +40% |
| 2007 | +3.9% | +54% | +45% |
| 2006 | +2.7% | +48% | +43% |
| 2005 | +13% | +44% | +35% |
| 2004 | +6.5% | +28% | +24% |
| 2003 | +6.6% | +20% | +15% |
| 2002 | +3.9% | +12% | +11% |
| 2001 | +8.2% | +8.2% | +5.6% |
| 2000 | — | — | — |
Federal Housing Finance Agency House Price Index (annual, developmental) for ZIP codes 60552, 60548, weighted by land area. It tracks repeat sales and appraisals of the same homes, so it shows how prices changed, not what homes cost. The estimated value scales the Census (ACS 2020-2024) median home value by that change.
No new homes permitted in 2025
No permits for new homes were issued in Somonauk in 2025. The last year with any was 2021 (1 new home).
Homes vs. people, 2010–2020
Between the 2010 and 2020 censuses, Somonauk's population fell by 107 even though 7 new homes were permitted. Homes are holding fewer people: households are getting smaller, or more homes are used part of the year.
Residents: U.S. Census Bureau, 2010 and 2020 censuses. New homes: permits issued 2010–2019.
Show as a table
| Year | New homes | Single-family | 2+ per building | Value |
|---|---|---|---|---|
| 2026 (Jan–Aug) | 0 | 0 | 0 | — |
| 2025 | 0 | 0 | 0 | — |
| 2024 | 0 | 0 | 0 | — |
| 2023 | 0 | 0 | 0 | — |
| 2022 | 0 | 0 | 0 | — |
| 2021 | 1 | 1 | 0 | $300,000 |
| 2020 | 1 | 1 | 0 | $200,000 |
| 2019 | 1 | 1 | 0 | $350,000 |
| 2018 | 1 | 1 | 0 | $295,000 |
| 2017 | 1 | 1 | 0 | $375,000 |
| 2016 | 2 | 2 | 0 | $525,000 |
| 2015 | 0 | 0 | 0 | — |
| 2014 | 2 | 2 | 0 | $360,000 |
| 2013 | 0 | 0 | 0 | — |
| 2012 | 0 | 0 | 0 | — |
| 2011 | 0 | 0 | 0 | — |
| 2010 | 0 | 0 | 0 | — |
| 2009 | 1 | 1 | 0 | $200,000 |
| 2008 | 1 | 1 | 0 | $95,000 |
| 2007 | 5 | 5 | 0 | $994,000 |
| 2006 | 3 | 3 | 0 | $663,000 |
| 2005 | 5 | 5 | 0 | $960,000 |
| 2004 | 1 | 1 | 0 | $250,000 |
| 2003 | 38 | 38 | 0 | $5.5 million |
| 2002 | 18 | 18 | 0 | $2.3 million |
| 2001 | 19 | 19 | 0 | $2.7 million |
| 2000 | 14 | 14 | 0 | $2 million |
Homes authorized by building permits, counted in the year the permit was issued. U.S. Census Bureau, Building Permits Survey, through August 2026.
Somonauk and its neighbors
| Town | 1-yr change | 2-bed rent | New homes 2025 | Median income |
|---|---|---|---|---|
| Somonauk | +8.7%† | $1,640 | 0 | $84,583 |
| Lake Holiday | +6.7%† | $1,670 | — | $107,875 |
| Sandwich | +5.1%† | $1,700 | 16 | $80,768 |
† FHFA price index change, where Zillow has no home value for the town.
2.8 years of income
The typical Somonauk home costs about 2.8 years of the town's median household income, less than across Illinois (3.6 years).
Home value ÷ ACS median household income.
Owners, rent & taxes
U.S. Census Bureau, ACS 2020-2024.
A two-bedroom rents for about $1,640
HUD's Fair Market Rent for a two-bedroom in Somonauk is $1,640 a month, utilities included: roughly what a modest, recently rented unit costs. Renters already in Somonauk pay a median of $993, so moving in tends to cost more than staying put. A two-bedroom takes about 23% of the town's median household income.
Studio $1,170 · 4 bedrooms $2,570
U.S. Department of Housing and Urban Development, FY2026 Fair Market Rents by ZIP code (60548, 60552; DeKalb County, IL HUD Metro FMR Area), weighted by land area. A Fair Market Rent is the 40th-percentile rent plus utilities for a standard unit. Median rent: U.S. Census Bureau, American Community Survey.
Home values: Zillow Home Value Index (ZHVI), Zillow Research. Sales, days on market and supply: Redfin Data Center, May 2026. Income, ownership, taxes and rent: U.S. Census Bureau, American Community Survey. New homes: U.S. Census Bureau, Building Permits Survey. Price trend: Federal Housing Finance Agency House Price Index. Fair Market Rents: U.S. Department of Housing and Urban Development. Listings link to their publishers.