Lannon property owners paid property taxes equal to 1.3% of their home’s value in the fourth quarter of 2025, surpassing the U.S. average by more than 1.5 times, BlockShopper.com reports.
During the same quarter, 17 homes sold in Lannon with a median sales price of $345,000. For the year, the city saw a median property tax bill of $4,478—representing 1.3% of the median home value taxed.
The average effective property tax rate in the U.S. was 0.888% in 2024.
Within Waukesha County, the cities with the highest effective property tax rates were Oconomowoc Lake, Lac La Belle, and Chenequa.
This article uses estimated inflation values and the county’s 2024 tax data to calculate the 2025 effective property tax rate. Actual effective rates could differ slightly in certain situations.
U.S. home prices rose again in 2025, with the national median hitting about $447,000 in June. That marks a 1.13% gain over the previous year, according to Redfin. The data indicates a notable supply-demand imbalance—there were 36% more sellers than buyers, or 508,715 more homes for sale. Redfin characterizes a balanced market as one in which seller and buyer numbers differ by less than 10%.
The following table presents a comparison of Oconomowoc Lake with other cities in Waukesha County, listing the median effective property tax rate calculated from fourth-quarter 2025 sales and tax information.
| City | Q4 2025 Sales | Q4 2025 Median Price | Median tax 2025 | Effective tax rate |
|---|---|---|---|---|
| Oconomowoc Lake | 9 | $449,000 | $15,170 | 3.4% |
| Lac La Belle | 10 | $476,300 | $16,349 | 3.4% |
| Chenequa | 8 | $587,500 | $19,435 | 3.3% |
| Elm Grove | 50 | $580,800 | $7,840 | 1.3% |
| Lannon | 17 | $345,000 | $4,478 | 1.3% |
| Waukesha | 206 | $371,950 | $4,503 | 1.2% |
| Sussex | 74 | $427,200 | $5,220 | 1.2% |
| Summit | 44 | $557,500 | $6,469 | 1.2% |
| New Berlin | 376 | $399,950 | $4,361 | 1.1% |
| Merton | 25 | $515,000 | $5,606 | 1.1% |
| Delafield | 65 | $566,100 | $6,230 | 1.1% |
| Mukwonago | 49 | $375,000 | $4,123 | 1.1% |
| Oconomowoc | 184 | $441,500 | $4,724 | 1.1% |
| Dousman | 17 | $480,500 | $5,146 | 1.1% |
| Menomonee Falls | 293 | $398,250 | $4,072 | 1% |
| Brookfield | 82 | $449,000 | $4,695 | 1% |
| Butler | 12 | $299,900 | $3,017 | 1% |
| Hartland | 56 | $409,625 | $4,158 | 1% |
| Okauchee Lake | 50 | $491,000 | $5,083 | 1% |
| Wales | 41 | $450,000 | $4,519 | 1% |
| Muskego | 181 | $433,000 | $4,149 | 1% |
| Pewaukee | 212 | $397,500 | $3,844 | 1% |
| Eagle | 19 | $358,400 | $3,340 | 0.9% |
| North Prairie | 14 | $484,950 | $3,807 | 0.8% |
| Vernon | 58 | $450,500 | $3,510 | 0.8% |
| Nashotah | 15 | $748,500 | $4,659 | 0.6% |
| Big Bend | 3 | $663,400 | $3,304 | 0.5% |
