Is buying one of the Aurora IL homes for sale cheaper than buying in Naperville?
Often the purchase price is lower in Aurora, but the total cost depends on the exact address, not the city name. Aurora spans four counties and Naperville spans two, so your tax bill, utility providers, and closing paperwork change from one street to the next. Compare the parcel’s actual tax bill, its utilities, and the city transfer tax rules before you decide which side of Route 59 gives you more for your money.
By Kealan O’Neil | Updated October 27, 2026
If you’re scrolling Aurora IL homes for sale with a Naperville listing open in the next tab, you’re not alone. The two cities share a border, a Metra line, and a lot of the same shopping, so buyers assume the only real difference is the sticker price. That assumption is where the costly surprises start.
On local forums, the questions buyers ask about this comparison keep landing in the same place: why two similar homes a mile apart carry very different tax bills. The answer is almost never the city. It’s the county, the township, and the taxing districts printed on the bill. Here’s how I walk buyers through it.
Aurora IL homes for sale: 5 cost differences buyers miss
These are the line items that change your real monthly and closing costs when you’re choosing between Aurora and Naperville. None of them show up in the list price.
1. Aurora sits in four counties, Naperville in two
The City of Aurora lists four counties within its limits: Kane, DuPage, Kendall, and Will, and most of the city sits in Kane and DuPage. Naperville sends residents to two county treasurers, DuPage and Will.
That matters because each county runs its own assessment and billing calendar. A home on the west side of Aurora and a home near the Naperville border can sit in different counties, different townships, and different school and park districts, and each of those taxing bodies sets its own levy.
The practical move is to pull the current tax bill for the specific parcel and read the “taxing district” list on it. If the home has a homeowner exemption today, ask whether it will carry over to you. Our guide to property taxes and SSAs in Kendall and Kane counties explains how to read that bill line by line.
2. Your tax due dates and late interest
For 2025 taxes payable in 2026, both Kane County and DuPage County set the first installment due June 1, 2026 and the second due September 1, 2026. The DuPage County Treasurer charges 1.5% interest per month on late installments.
Will and Kendall publish their own calendars, so confirm the dates with the treasurer named on your bill. At closing, Illinois property taxes are paid a year in arrears, which means the seller usually credits you for their share of taxes you’ll pay later. The amount of that credit depends on which county bill the home is on.
3. Electric service: Naperville runs its own utility
This one surprises a lot of buyers. Naperville owns its electric utility. The city’s Department of Public Utilities reported 63,747 customers as of January 2026, and its 2026 residential rate is a $21.52 monthly customer charge plus $0.11968 per kilowatt hour.
Aurora homes are not on Naperville’s electric system. When you compare Aurora IL homes for sale against Naperville listings, ask each seller for a year of electric bills so you’re comparing real usage and real providers, not a guess.
4. Water: Fox River and wells vs. Lake Michigan
Aurora treats its own water. The city’s 2025 Water Quality Report says its plant blends Fox River surface water with water from shallow and deep wells, then lime-softens and treats it.
Naperville buys Lake Michigan water through the DuPage Water Commission, delivered from the City of Chicago’s Jardine Water Purification Plant. Unincorporated customers on Naperville water pay a 30% surcharge, so check whether the address is inside city limits.
Neither source is automatically cheaper for you. Compare the seller’s actual water and sewer bills, and if the house is older, ask about the service line material before you waive anything.
5. City transfer tax: same math, different payer
Here’s a detail most buyers of Aurora IL homes for sale never notice until the closing statement. Both cities charge a municipal real estate transfer tax that works out to the same rate, but they put it on different sides of the deal.
- Aurora: $3 for every $1,000 of value or fraction thereof. Under the Aurora transfer tax ordinance, primary liability is on the seller unless the contract says otherwise.
- Naperville: $1.50 per $500 of purchase price, rounded up to the next $500. The City of Naperville says buyers of property in incorporated Naperville must purchase the stamp.
On those published formulas, a $400,000 sale works out to $1,200 of city transfer tax in either city. In Aurora the seller usually writes that check. In Naperville it’s your line item as the buyer. That’s on top of the state transfer tax, which 35 ILCS 200/31-10 sets at 50 cents per $500 of value, plus any county tax.
For the full list of buyer-side closing costs, see our Illinois home buying costs hub.
What the closing paperwork looks like in each city
Both cities won’t issue a transfer stamp until the seller’s city accounts are cleared, and both want lead time. Missing either deadline can push your closing.
Aurora asks for a Statement of Open Accounts at least 5 business days before closing. The city won’t issue a stamp until the seller’s water and sewer account, fines, and liens are paid. The seller also has to request a final water reading.
Naperville asks for its Statement of Open Accounts at least seven business days before closing and says processing can take up to seven business days. Your attorney and title company handle most of this, but it’s worth knowing why a closing date in Naperville needs a little more cushion.
New construction in Aurora: ask about impact fees
Aurora’s transfer tax page notes that school developmental impact fees may apply when a newly built home sells. If you’re buying new construction in Aurora, ask the builder in writing who pays any impact fee and whether it’s already in the price.
How the monthly payment math changes with today’s rates
An earlier version of this post expected mortgage rates to settle around 6%. That didn’t happen. Freddie Mac’s Primary Mortgage Market Survey put the 30-year fixed average at 7.32% as of October 22, 2026, down from 7.40% the week before.
Here’s an example only, not a quote. On a $320,000 loan at 7.32% for 30 years, principal and interest come to about $2,198 a month. At 6%, the same loan would be about $1,919. That gap of roughly $280 a month is why the purchase price difference between Aurora IL homes for sale and Naperville homes matters more now than it did when rates were lower.
Your rate depends on your credit, down payment, and loan type, so get a written estimate from your lender. Then add the actual tax bill, insurance, any HOA dues, and the utilities above to compare true monthly costs side by side.
A side-by-side checklist for Aurora IL homes for sale and Naperville listings
- Pull the current tax bill for each parcel and note the county, township, and taxing districts.
- Ask each seller for 12 months of electric, gas, water, and sewer bills.
- Confirm whether each address is inside city limits, which affects transfer stamps and water rates.
- Run the payment at your lender’s quoted rate, not a national average.
- For new construction, get impact fees, SSA charges, and HOA dues in writing.
Getting around: the BNSF line runs through both cities
If you commute downtown, Metra’s BNSF line has stations in both cities, including the Route 59 station, which serves buyers on both sides of the city line. That shared commute is one reason so many Aurora searches overlap with Naperville ones.
Before you pick a home based on the train, check the parking situation at the station you’d actually use and drive the route at rush hour. A short distance on the map can still mean a slow morning.
Want to dig deeper into each city? Our Aurora, IL real estate guide covers the city’s housing mix and costs, and our Naperville, IL real estate guide does the same on the other side of the line.
Aurora vs. Naperville questions buyers ask before making an offer
Is Aurora cheaper than Naperville to buy a home?
Who pays the city transfer tax in Aurora and Naperville?
Does Naperville have its own electric company?
Where does Aurora’s drinking water come from compared to Naperville’s?
How do I choose a real estate agent for Aurora and Naperville?
Compare the two homes you’re torn between
If you’ve narrowed your search to one of the Aurora IL homes for sale and one Naperville listing, the fastest way to decide is to line up the real numbers: tax bill, utilities, transfer stamps, and the payment at your rate. I’ll pull the parcel details for both and walk you through what each one really costs before you write an offer. Call or text Kealan at 630-425-8815.
About Kealan O’Neil
Kealan O’Neil is the Designated Managing Broker and founder of O’Neil Property Group, an independent real estate brokerage based in Yorkville, Illinois. He and his team help buyers and sellers in Yorkville, Oswego, Montgomery, and the surrounding Kendall and Kane County communities, and he owns and manages a local rental portfolio, so he approaches every decision as both a broker and an investor. Call or text Kealan at 630-425-8815.
This post is general information about real estate in the Fox Valley, not legal, tax, or financial advice. Real estate laws, tax rules, and municipal ordinances change, and how they apply depends on your specific situation. Talk with a licensed attorney, CPA, or lender before making decisions about a purchase, sale, or tax matter. O’Neil Property Group is a licensed Illinois real estate brokerage.