Income needed to buy a home
St. Clair County, IL
$66,292
a year in household income to buy the typical St. Clair County home with 10% down.
The monthly math
Typical home value$179,207
Down payment (10%)$17,921
Loan$161,286
Principal and interest (7.40%)$1,117/mo
Property tax (1.83% a year)$273/mo
Homeowners insurance (estimate)$90/mo
Mortgage insurance$67/mo
Total monthly cost$1,547/mo
Income needed keeps housing at 28% of gross income, the lender rule of thumb.
What locals earn
Within reach
The typical household here earns $73,854 a year, 11% more than it takes.
In Illinois
St. Clair County ranks #69 of 102 for the income a home takes, from least to most.
Easiest to afford in Illinois
| County | Typical home | Income needed |
|---|---|---|
| Alexander County | $51,236 | $17,751 |
| Pulaski County | $74,037 | $25,267 |
| Scott County | $90,376 | $31,882 |
| Saline County | $88,425 | $32,129 |
| Gallatin County | $91,943 | $32,573 |
Typical home value from the Zillow Home Value Index, August 2026. Rate is the Freddie Mac 30-year average for Oct 8, 2026. Property tax rate is total taxes paid divided by total home value in the county (U.S. Census, ACS 2020-2024). How it works.