A Chicago closing scheduled for October 1 brings property taxes into the picture. A median Chicago homeowner's tax bill is $4,597. That number will not appear in any market report this month.
Neither will the fact that Chicago's headline median price is currently two different numbers. Illinois REALTORS puts the City of Chicago median sale price at $425,000 for July 2026, up 13.3 percent from $375,000 a year earlier. Zillow's Home Value Index, measured across the entire housing stock as of July 31, 2026, puts the typical Chicago property at $337,993, up 4.5 percent. Almost $90,000 separates the two figures for the same city in the same month, and neither one is wrong. They measure different things, and the gap between them says more about where you're looking in Chicago than either number says on its own.
The Bill That Lands Before the Ink Dries
Cook County says its second-installment property tax bills for tax year 2025 went out by September 1, 2026, with payment due October 1. That due date has slipped for several years running: Cook County Treasurer records show the tax year 2024 bill wasn't due until December 15, 2025, four months later than its normal early-August schedule, and WTTW reported that this year's bill still landed two months late. The county has tied the delays to an ongoing overhaul of the treasurer's billing system.
Property taxes also factor into closing costs. Median bills run $8,007 in the north and northwest suburbs and $6,468 in the south and southwest suburbs, against $4,597 inside the city.
One City, Two Medians
| Report | Coverage | Figure | Date |
|---|---|---|---|
| Illinois REALTORS median sale price | City of Chicago, closed sales | $425,000 (+13.3% YoY) | July 2026 |
| Illinois REALTORS median sale price | Nine-county Chicago Metro Area | $401,000 | July 2026 |
| Zillow Home Value Index | City of Chicago, full housing stock | $337,993 (+4.5% YoY) | July 31, 2026 |
A closed-sale median only counts homes that changed hands that month. A value index estimates every property in the city, whether it sold or not, including the two-flat on a Southwest Side block that hasn't traded in decades. Both are legitimate ways to describe a housing market. They describe different slices of it, and Chicago's slices look unusually different from each other right now.
What's Actually Selling Explains the Gap
The Institute for Housing Studies at DePaul University tracked 2,850 closed sales in the city in July 2026. Of those, 2,137—three out of every four—were condominiums or townhomes, closing at a median of $440,000. The remaining 713 sales were single-family houses, closing at a median of $392,000, nearly $50,000 lower than the condo segment. A citywide median built from that mix sits closer to condo pricing than house pricing, simply because condos are what's trading.
That imbalance isn't only about price. City single-family inventory fell to 1,354 listings in July 2026 from 1,903 a year earlier, a steeper drop than the condo market's fall from 2,850 to 2,148. Single-family houses are also taking longer to sell, averaging 25 days on market versus 19 for condos, but from a much thinner supply. Fewer houses are for sale, and although they take longer to sell than condos, the market remains relatively brisk, so a shopper comparing a single-family budget against a citywide median is comparing against a number built mostly from a different product.
The Same Split Shows Up Block by Block
Zoom into specific community areas and the same composition effect repeats at a smaller scale. Detached single-family homes in Bridgeport closed at a median of $597,500 through August 2026, up 10.6 percent year over year. The Lower West Side, which includes Pilsen, posted the strongest detached single-family gain in the city at 12.2 percent over the same period. Both areas have drawn buyers looking for more square footage at prices below what the North Side commands, and detached inventory in both areas has stayed tight enough to keep upward pressure on offers.
The Loop tells a different story at a lower headline number. Its blended median across all property types sits at $421,000, below Bridgeport's detached figure, but the Loop is overwhelmingly a condo market, and studio and one-bedroom units pull that median down even as larger units push it up. The Near North Side, covering River North, Streeterville, and the areas bordering Lincoln Park and the Gold Coast, closed at a median of $464,000 with a milder 4.3 percent gain, a market where structurally limited supply keeps prices steady without the sharp swings showing up in Bridgeport or Pilsen. Near the United Center, University Village, and the Illinois Medical District, attached single-family homes closed flat year over year at a median of $420,000, a number that looks static on paper while the surrounding area has changed considerably over the past decade.
The Loop's $421,000 blended median and Bridgeport's $597,500 detached figure reflect very different housing mixes: downtown condos and Southwest Side detached homes. The citywide median blurs that distinction. A block-level look restores it.
Why the Next Two Years Won't Move the Same Way Everywhere
According to JVM Lending, Cook County reassesses property values on a rotating three-year cycle. The City of Chicago went through its full reassessment in 2024. The northern suburbs went through theirs in 2025. The south and southwest suburbs are in their reassessment year now, in 2026. On that rotation, Chicago's next full reassessment falls in 2027.
That timing means a city buyer closing this year is working from an assessment that's already a year or two settled, with no citywide reset scheduled until 2027. A buyer closing on a south or southwest suburban property this year is stepping directly into a reassessment cycle that can move the tax number attached to that property before the next bill even arrives. Both buyers might be looking at similar sale prices. They are not looking at similar tax trajectories.
Before You Compare Two Neighborhoods
A single citywide number, whichever one you pick, answers a narrower question than it looks like it answers. Before treating one Chicago median as the standard for comparing two areas, it helps to check a few things specific to each one:
- What's actually closing there. A neighborhood's median means something different if it's built from condo sales than if it's built from detached houses, even when the dollar figures land close together.
- Whether the number is a closed-sale median or a value index. One counts a month of transactions. The other estimates the entire stock, sold or not.
- Where that property sits in the reassessment rotation. A city parcel and a south suburban parcel can carry the same price tag and completely different tax pictures over the next two years.
Quick Answers
Why do Zillow and Illinois REALTORS report different Chicago prices for the same period? They measure different things. Illinois REALTORS reports the median of homes that actually closed in a given month. Zillow's Home Value Index estimates a typical value across the full housing stock, including homes that haven't sold recently. A market with heavy condo turnover, like Chicago's this summer, will show a closed-sale median that runs higher than a stock-wide estimate.
When is Chicago's next full property reassessment? The City of Chicago was reassessed in 2024 on Cook County's rotating three-year cycle. The next full citywide reassessment falls in 2027.
Comparing two Chicago neighborhoods on price alone leaves out the parts of the picture that actually decide what you'll pay to own there: what's trading, where each block sits in the tax cycle, and what a closing date in early October actually costs. If you're weighing a specific Chicago neighborhood and want help reading those numbers block by block, The NextGEN Group can walk through them with you.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
