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We compared 137,775 Lake County homes with the homes most like them nearby, using the county's own records. 6 percent are assessed higher per square foot than every one of those neighbors, which is the test the Illinois appeal board applies. Here's that figure for every town with enough homes to measure.
Just got your notice? Here's what the numbers mean and every township's 2026 deadline.
| Town | Homes compared | Above every similar neighbor |
|---|---|---|
| Antioch | 3,720 | 7.2% |
| Barrington | 1,094 | 9% |
| Beach Park | 2,711 | 6.7% |
| Buffalo Grove | 8,451 | 4.5% |
| Deer Park | 683 | 7.6% |
| Deerfield | 4,826 | 6% |
| Fox Lake | 2,462 | 6.6% |
| Grayslake | 8,108 | 4.9% |
| Green Oaks | 477 | 8.4% |
| Gurnee | 9,615 | 5% |
| Hainesville | 1,164 | 3.6% |
| Hawthorn Woods | 1,917 | 8.2% |
| Highland Park | 4,472 | 9.7% |
| Highwood | 400 | 11.3% |
| Ingleside | 974 | 14.2% |
| Island Lake | 778 | 7.8% |
| Kildeer | 551 | 11.6% |
| Lake Barrington | 1,528 | 7.1% |
| Lake Bluff | 1,153 | 8.8% |
| Lake Forest | 2,147 | 9.1% |
| Lake Villa | 3,800 | 6% |
| Lake Zurich | 5,752 | 5.9% |
| Lakemoor | 804 | 4.7% |
| Libertyville | 4,456 | 5.5% |
| Lincolnshire | 1,868 | 5.8% |
| Lindenhurst | 4,138 | 4.7% |
| Long Grove | 830 | 15.1% |
| Mundelein | 8,713 | 4.6% |
| North Barrington | 271 | 14.8% |
| North Chicago | 2,008 | 7.2% |
| Park City | 193 | 13% |
| Prairie View | 172 | 9.9% |
| Riverwoods | 351 | 12.3% |
| Round Lake | 5,523 | 4.2% |
| Round Lake Beach | 6,915 | 4.2% |
| Round Lake Heights | 681 | 4.6% |
| Round Lake Park | 1,025 | 6.7% |
| Third Lake | 209 | 8.1% |
| Vernon Hills | 7,716 | 2.8% |
| Volo | 1,770 | 2.5% |
| Wadsworth | 237 | 14.8% |
| Wauconda | 3,675 | 5.9% |
| Waukegan | 12,544 | 7.2% |
| Winthrop Harbor | 1,608 | 6.8% |
| Zion | 4,448 | 7.4% |
So for Cook County we publish how many appeals actually won, because the Assessor there publishes every case. Lake County doesn't publish its appeal outcomes in any form we can read, and we'd rather show you a number we've measured than one we've made up.