Grundy County, IL Housing Market Brief
county · IL · score computed October 2026
What is Grundy County, IL’s Alpha Score?
The Alpha Score is a composite 0–100 index of market strength, a weighted blend of five dimensions. See the methodology.
Population band 4 of 5 (population 39,232–102,612) · comparable within its band
Where is Grundy County, IL in its market cycle?
Grundy County, IL is classified as Declining — cooling, with scores declining over recent months. This is a classification of recent (1–12 month) momentum, not a price forecast.
What’s the forecast for Grundy County, IL?
County-level forecasts are paused (since Oct 18, 2026). The new public-data model we built to replace them didn't pass our accuracy test, and we won't publish forecasts again until a model does.
Grundy County, IL housing market data
| Metric | Value | YoY | Source |
|---|---|---|---|
| Median Sale Price | $297K | ▼ -4.1% | Redfin |
| Median Days on Market | 49 days | ▼ -2% | Redfin |
| Months of Supply | 3.1 | ▲ +14.8% | Redfin |
| Homes for Sale | 179 | ▲ +17.8% | Redfin |
| Homes Sold | 59 | ▲ +3.5% | Redfin |
| Median Price / Sq Ft | $187 | ▲ +0.8% | Redfin |
How has Grundy County, IL’s Alpha Score moved?
Markets like Grundy County, IL
Frequently asked questions
Is Grundy County, IL a buyer's or seller's market?
In the scores computed October 2026, Grundy County, IL is classified as a Balanced Market, based on its Alpha Score of 50 out of 100. The classification reflects current price, building, affordability, economic, and rental-yield conditions.
Are home prices rising or falling in Grundy County, IL?
The median sale price in Grundy County, IL is $297K, having fallen 4.1% over the past year, according to Redfin.
How affordable is Grundy County, IL?
Grundy County, IL scores 49 out of 100 on affordability — moderately affordable relative to local incomes and prevailing mortgage rates compared with other counties.
What's driving Grundy County, IL's Alpha Score?
Grundy County, IL's strongest dimension is Price Momentum (78/100) and its weakest is Inventory Health (39/100). The Alpha Score is a weighted blend of all five dimensions.
Want the live, interactive view of Grundy County, IL? Open the full market dashboard — charts, ZIP-level drill-down, and watchlist tracking. Explore the map or read the methodology.