Oconomowoc, WI · Updated Oct 2026

What a Oconomowoc 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 Oconomowoc house

$8,326a year · $694 a month

Starts at $455,000 of value before exemptions. Typical use.

Property tax$4,645
1.021% of $455,000
Electricity and gas$2,003
660 kWh a month $1,186 · 72.1 therms $817
Water and sewer$1,473
7,000 gallons a month on Oconomowoc Utilities (City water utility): water $64, sewer $59 a month
Trash$205
Garbage, recycling and yard waste (flat residential fee), $17 a month
Home insuranceNot included
We don't have a typical premium for this city yet. Add yours with Adjust.

A typical Oconomowoc house costs about $8,300 a year: $4,650 property tax and charges, $1,470 water and sewer, $200 trash, $2,000 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:

Energy assistance for income-qualifying householdsIncome-qualifying
The City's local Energy Assistance Program helps income-qualifying households with their energy costs.
How: See the City's Utility Billing page.
$25 central air tune-up rebate$25 rebate
A rebate of $25 is available for a qualified tune-up and inspection of a central air conditioner under 5 tons, once every three years.
How: See the City's utility rate summary.
Tree Power shade-tree rebateUp to $50 per tree
A rebate of up to $50 per tree (limit 3) is available for qualified trees that will shade an air conditioner or home.
Cart help if you are physically unable
Qualified residents unable to bring carts to the curb because of handicap, disability or age can have the hauler wheel them out and back.
How: Download the form on the City's refuse page or call 262-569-2189.

Money dates

January 31, April 30 and July 31in 88 daysReal estate property taxes can be paid in three installments due January 31, April 30 and July 31.
Late installmentsA late third installment is charged interest of 1% per month and a penalty of ½% per month on the remaining balance.

Who serves this house

Water: Oconomowoc Utilities (City water utility); Volume charges are per 1,000 gallons used each month, in three tiers.
Property tax: 1.02% of value; 2025 tax year, City of Oconomowoc in the Oconomowoc school district
Garbage: Johns Disposal (City of Oconomowoc contract); Garbage, recycling and yard waste collection
Sewer: City of Oconomowoc Wastewater Utility; $7.50 per 1,000 gallons plus a monthly service charge
Electricity: Oconomowoc Utilities (City electric utility); Billed on the same monthly bill as water and wastewater
Gas: We Energies; Oconomowoc is listed in We Energies' gas tariff book
Schools: Oconomowoc Area School District; County tax table lists the City of Oconomowoc in the Oconomowoc school district

Pay or manage your bills

Your water

Source: Five of the seven wells are drilled into the sandstone aquifer and two into the shallow sand and gravel formation.
Hardness: Total hardness averaged 375 mg/l (range 320 to 420).

Other WI cities

Milwaukee home costs Waukesha home costs Oshkosh home costs Brookfield home costs Wausau home costs Oak Creek home costs Muskego home costs De Pere home costs Howard home costs Pleasant Prairie home costs Germantown home costs South Milwaukee home costs Marshfield home costs Fox Crossing home costs Menasha home costs Kaukauna home costs Ashwaubenon home costs Weston home costs Glendale home costs Shorewood home costs Greenville home costs Allouez home costs Suamico home costs Stoughton home costs Sussex home costs Grafton home costs Brown Deer home costs Oregon home costs Waupun home costs Monroe home costs New Richmond home costs Windsor home costs Green Bay home costs Madison home costs Sheboygan home costs New Berlin home costs Beloit home costs Stevens Point home costs River Falls home costs Beaver Dam home costs Cudahy home costs Pewaukee home costs Two Rivers home costs Hartland home costs Reedsburg home costs Appleton home costs Shawano home costs Portage home costs Delavan home costs Cottage Grove home costs McFarland home costs Plymouth home costs Mukwonago home costs Rhinelander home costs Jackson home costs Antigo home costs Hales Corners home costs Jefferson home costs Kimberly home costs Rib Mountain home costs Delafield home costs New London home costs Waupaca home costs Waterford home costs Milton home costs Berlin home costs Dodgeville home costs East Troy home costs Fox Point home costs Elm Grove home costs Evansville home costs Columbus home costs

How these numbers are made

Property tax uses the county's 2025 rates for the City of Oconomowoc in the Oconomowoc school district: city 4.16, county 1.28, technical college 0.25 and school 5.85 less the 1.18 state credit, per $1,000, on the City's average home value of $455,000. Rates are scaled by the county's 98.55% assessment ratio (equalized $10.36 to assessed $10.21 per $1,000).
Water: $14.20 monthly meter charge plus $9.63 public fire protection for a 5/8-inch meter; volume $5.93 per 1,000 gallons up to 70,000 gallons a month, $4.78 to 255,000 and $3.96 above (effective 10/15/2025).
Sewer uses the 2026 city rates: $8.50 monthly service charge plus $7.50 per 1,000 gallons of water used. The 2026 trash fee of $205 per household a year is divided by 12.
Electric is the city utility's Rg-1: $13.00 customer charge plus $1.00 commitment to community charge and $0.1285 per kWh, effective 8/1/2023. The monthly power cost adjustment varies and no current figure is published, so it is not added. Residential sales tax exempt Nov-April is not modeled.
Gas uses We Energies Rg-1 as on the Brookfield page, with the use assumption from the We Energies rate review.
Johns Disposal's new contract starts 7/1/2026 with a flat 3% annual increase, so the 2027 trash fee may rise; not modeled.
Nothing here is legal, tax or insurance advice.

Sources

How Oconomowoc compares

A typical Oconomowoc house against the 47 Wisconsin cities we cover, using the same default numbers as the total above.

Per year	Oconomowoc	Median	Where it falls
Property tax rate	1.02%	1.54%	lower than 43 of the other 45 Wisconsin cities we cover
Water	$765	$461	higher than 39 of the other 46 Wisconsin cities we cover
Sewer and utility-bill fees	$708	$687	higher than 24 of the other 46 Wisconsin cities we cover
Trash	$205	$199	higher than 16 of the other 30 Wisconsin cities we cover
Electricity and gas	$2,003	$1,905	higher than 27 of the other 46 Wisconsin cities we cover
Total	$8,326	$7,415	higher than 31 of the other 46 Wisconsin cities we cover

Cities bill differently (some put trash on the tax bill, some cover more services), so a higher number isn't necessarily worse. The property tax rate is compared instead of dollars because house values differ.

Questions to ask your candidates

Each one starts from a number above. Any candidate can answer them.

1. Property tax rate

The fact: Oconomowoc's property tax rate is 1.02%, lower than 43 of the other 45 Wisconsin cities we cover. The rate adds up every agency on the bill, not only the city.

Ask: "Property tax in Oconomowoc is 1.02%, lower than 43 of the other 45 Wisconsin cities we cover. What should that money pay for first, and would you change anything about how it is set?"

2. Water

The fact: Water here costs about $765 a year at typical use, higher than 39 of the other 46 Wisconsin cities we cover.

Ask: "Water here costs about $765 a year at typical use, higher than 39 of the other 46 Wisconsin cities we cover. What drives that cost, and would you change anything?"

Common questions about Oconomowoc house costs

What is the property tax rate in Oconomowoc?

About 1.02% of the value before exemptions a year (2025 tax year, City of Oconomowoc in the Oconomowoc school district), plus flat charges on the same bill.

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

About $5,105 a year on $500,000 of the value before exemptions.

How much is the water bill in Oconomowoc?

About $123 a month for water and sewer at typical use (7,000 gallons a month) on Oconomowoc Utilities (City water utility).

How much does trash pickup cost in Oconomowoc?

$17 a month for a house.

When is property tax due in Oconomowoc?

January 31, April 30 and July 31: Real estate property taxes can be paid in three installments due January 31, April 30 and July 31. Late installments: A late third installment is charged interest of 1% per month and a penalty of ½% per month on the remaining balance.

Where can I get help paying utility bills in Oconomowoc?

Energy assistance for income-qualifying households: The City's local Energy Assistance Program helps income-qualifying households with their energy costs. See the City's Utility Billing page.

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

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