Wonder Lake, IL · Updated Oct 2026

What a Wonder Lake home costs each year

Property tax, water, trash and energy from public rates. Look up your address to make it yours, and see how to pay less.

Suggestions as you type come from Google; the lookup uses free public map services to find who serves it. Not stored unless you save your house.

Example · a Wonder Lake house

$8,873a year · $739 a month

Starts at $84,067 of value before exemptions. Typical use.

Property tax$5,601
7.363% of $84,067, less $8,000 general homestead exemption
Electricity and gas$1,808
609 kWh a month $1,339 · 31 therms $469
Water and sewer$1,204
7,000 gallons a month on Village of Wonder Lake Water Department: water $56, sewer $45 a month
Trash$259
95-gallon cart (trash, recycling and yard waste), $22 a month
Home insuranceNot included
We don't have a typical premium for this city yet. Add yours with Adjust.

A typical Wonder Lake house costs about $8,900 a year: $5,600 property tax and charges, $1,200 water and sewer, $260 trash, $1,810 electricity and gas; home insurance is not included (no typical premium yet). Estimated from public rates, not anyone's actual bill.

Rates checked Oct 31, 2026. Insurance: what you enter, or a typical premium until you do. Sources are listed at the bottom.

Ways to pay less

Nothing here applies to every house automatically. These are worth checking:

Seniors 65+: senior homestead exemption
Reduces equalized assessed value by up to $8,000.
How: See the McHenry County Assessments exemptions page.
Seniors 65+: low-income assessment freeze
Freezes the equalized assessed value at the base year (year before first qualifying). Must be 65 or older, household income $75,000 or less.
How: See the McHenry County Assessments exemptions page.
Persons with disabilities exemption
$2,000 off equalized assessed value annually.
How: See the McHenry County Assessments exemptions page.
Seniors: 20% off water and wastewater user rates
Senior Rate: 20% off Water & Wastewater User Rates.
How: See the village 2026 water rate schedule.
Seniors 65+: discounted garbage rate
Seniors 65+ can apply for the senior discount at Wonder Lake Village Hall.
How: Apply at Wonder Lake Village Hall.

Money dates

November 16, 2026in 12 daysDeadline for filing an assessment complaint, at midnight.
Late feeWater and sewer late fee (past 20 days): 10% of billing amount.

Who serves this house

Water: Village of Wonder Lake Water Department; 2026 monthly residential base rate $55.76 for up to 6,999 gallons; over-allotment rate $7.96 per 1K gallons.
Property tax: 7.36% of value; 2025 tax year (payable 2026), McHenry County, tax code 09085 (McHenry Township)
Garbage: MDC Environmental Services; MDC manages waste removal in the Village of Wonder Lake.
Electricity: ComEd; Electric service: ComEd.
Gas: Nicor Gas; Wonder Lake is listed in Nicor Gas’s territory municipalities (McHenry County).

Pay or manage your bills

Your water

Source: Wells: Wonder Lake Water Company community water supply groundwater wells including Well #4 and Well #5 near Thompson Road.

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How these numbers are made

Property tax uses the 2025 McHenry County rates for tax code 09085 (McHenry Township, Harrison School District 36, McHenry High School District 156, McHenry County College 528, Wonder Lake Fire, Village of Wonder Lake and Special Service Area 9). Other codes in the village (Greenwood Township with Woodstock District 200, other special service areas) differ by a few tenths of a point; code 09085 was chosen as a code in the lake-area subdivisions and was not weighted by home count.
The starting value is one third of the Data USA median property value ($252,200 / 3) because Illinois taxes equalized assessed value; the $8,000 general homestead exemption comes off it. The township equalization factor is modelled as 1.0.
Water is the village's 2026 base rate of $55.76 a month for up to 6,999 gallons plus $7.96 per 1,000 gallons above; sewer is the $44.61 base for up to 6,999 gallons plus $6.37 per 1,000 gallons above. Both are the village's monthly residential rates effective February 1, 2026.
Trash: the only published Wonder Lake rate is $21.60 a month for the 95-gallon cart from MDC's October 1, 2021 program letter; the village is on a 10-year MDC contract (board minutes) and no post-2021 rate appears on the village site, MDC's community page, the program letter or the minutes, so the current price is unpublished.
Electricity is ComEd single-family without electric space heat (January 2026 delivery lines plus October 2026 supply and transmission); gas is Nicor Rate 1 with the October 2026 gas cost. A village utility tax was discussed in board minutes from about 2010, but no adopted ordinance or current rate was found, so no utility tax is modelled; other riders are not modelled either. Many homes outside the village water system use private wells and septic; those costs are not shown.
Nothing here is legal, tax or insurance advice.

Sources

Common questions about Wonder Lake house costs

What is the property tax rate in Wonder Lake?

About 7.36% of the value before exemptions a year (2025 tax year (payable 2026), McHenry County, tax code 09085 (McHenry Township)), plus flat charges on the same bill.

How much is property tax on a $500,000 house in Wonder Lake?

About $36,226 a year on $500,000 of the value before exemptions with the general homestead exemption.

How much is the water bill in Wonder Lake?

About $100 a month for water and sewer at typical use (7,000 gallons a month) on Village of Wonder Lake Water Department.

How much does trash pickup cost in Wonder Lake?

$22 a month for a house.

Can seniors lower their property tax or bills in Wonder Lake?

Yes. Seniors 65+: senior homestead exemption: Reduces equalized assessed value by up to $8,000.

Where can I get help paying utility bills in Wonder Lake?

Seniors 65+: low-income assessment freeze: Freezes the equalized assessed value at the base year (year before first qualifying). Must be 65 or older, household income $75,000 or less. See the McHenry County Assessments exemptions page.

How much does a house in Wonder Lake cost to run each year?

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