How to Evaluate a School District When Buying a Home (And What It Does to the Price)

by Brian Wittman

You can size up any school district in Illinois yourself. The state publishes the numbers for every public school, for free, and once you know which ones to read, you won't need anybody's ranking or opinion to judge an address before you make an offer.

And here's the part the listing won't tell you. You don't pay for a school district once. You pay for it in the price, then you pay for it again on every tax bill, and those two don't always move together.

Take two $350,000 houses, both inside Joliet city limits. One's tax bill runs about $9,370 a year. The other's runs about $7,980. That's about $1,390 a year, every year you own it. And the lower bill sits in the district whose high schools post the higher proficiency numbers. Same city. Same price. Different school district on the bill.

How do you evaluate a school district when buying a home?

Look up every school the specific address feeds on the Illinois Report Card, read the numbers underneath the one-word designation, and confirm the attendance boundary with the district before you make an offer. In Illinois, the state rates schools, not districts, so "the district" really means the elementary, middle and high school your address is assigned to. Read proficiency, growth, graduation rate and attendance, not just the label. Then check what those districts put on your tax bill, because that's the second half of what you're buying.

Why do you have to check every school and not just the district?

Because Illinois doesn't give your district a designation. Under the 2025 rules, the Illinois State Board of Education assigns one to each school, and that's it.

It matters more than you'd think, because Illinois splits schools three ways. For 2025-26, ISBE counts 851 districts: 367 elementary, 96 high school and 387 unit districts, plus one run by the Department of Juvenile Justice. An elementary district runs through 8th grade, then hands kids off to a separate high school district. A unit district runs kindergarten through 12th grade on its own.

So the address you're looking at can carry two school districts, each with its own buildings, its own numbers and its own tax rate.

Look at Joliet. Under Joliet Township High School District 204, most of the city's in Joliet Public Schools District 86. But you'll also find Laraway 70-C, Union 81, Rockdale 84, Troy 30-C, New Lenox 122 and Elwood 203 feeding the same high school district. Plainfield District 202, which serves another part of Joliet, is a unit district.

When you evaluate a district, you're really evaluating that whole path, one building at a time.

How do you find out which schools an address actually feeds?

Not from the mailing address. And not from the school field on a listing.

The town on the envelope doesn't decide your district. Your parcel does. Will County's own explanation of the tax bill says the county clerk divides the county into tax code areas, and every property in one area "is under the jurisdiction of the same combination of taxing districts," school districts included.

Here's the order you'll want to work in:

Start with the district. Use its boundary map, or call its registrar. The map tells you the district. Only the district tells you the building.
Pull the parcel's last tax bill. It lists every school district levying on the property you're looking at. In Will County, you can look it up through the Supervisor of Assessments PIN search.
Treat finder tools as a first pass. The University of Illinois runs an Illinois School District Finder built on Census boundary data. Even it tells you to call the district's main office for the actual school.

Be careful with third-party attendance-zone maps. The federal government's own School Attendance Boundary Survey is labeled experimental, and its latest complete data is from 2015-2016. A map that can't tell you how current it is shouldn't be deciding your $350,000 purchase.

What do the Illinois Report Card designations mean?

Every public school you'll look at gets a one-word summary on the Illinois Report Card. Here's what the 2025 labels mean, in ISBE's own business rules:

Exemplary: performance in the top 10% of schools statewide, no student group performing at the level of the bottom 5% of schools, and a graduation rate above 67%.
Commendable: the same conditions, but not in the top 10%.
Targeted Support: at least one student group performing at or below the level of the bottom 5% of all schools.
Comprehensive Support: the lowest-performing 5% of Title I-eligible schools, or a high school graduating 67% or less.
Intensive Support: still in that lowest 5%, or still graduating 67% or less, after a full Comprehensive cycle.

Here's the catch with Commendable. About 73% of schools landed there under the current system, per Chalkbeat, so the word by itself doesn't tell you much.

The weights tell you more. For an elementary or middle school, growth counts for 50% of the designation and proficiency counts for only 15%. Chronic absenteeism adds another 20%. For a high school, graduation rate is half the designation. So the label tells you more about growth, attendance and graduation than about raw test scores, and that's exactly why you've got to open the page and look under it.

Are the Illinois school labels changing?

Probably, and soon. On April 15, 2026, ISBE's board approved a redesigned system with five new labels: Exemplary, Approaching Exemplary, Commendable, Developing and Comprehensive. ISBE plans to start using them with the 2026 Report Card, pending federal approval. The state publishes the Report Card each October.

So if you're reading this after the switch, the words on the page may not match the list above. The method doesn't change. A designation is a one-word summary, and you still read what's underneath it.

What should you read past the designation?

Five things, and you'll find them all on each school's Report Card page.

Proficiency. The share of students scoring Proficient or Above Proficient. Elementary and middle schools take the Illinois Assessment of Readiness in English and math. High schools have taken the ACT as the state test since the 2024-25 school year.
Growth. ISBE's student growth percentile runs from 1 to 99, and 50 means average or expected growth. It shows you whether kids are moving, not just where they started.
Graduation rate. It's half of a high school's designation.
Chronic absenteeism. The share of students missing a lot of school. In the redesign, it flips to its inverse, Consistent Attendance.
Teacher retention and spending. The Report Card shows a three-year teacher retention rate, plus operating and instructional spending per pupil for the district.

One warning on proficiency. The state changed the cut scores in 2025, so 2025 proficiency can't be compared to 2024 or earlier. ISBE told families directly: "We won't be able to compare proficiency rates going forward to prior years." If someone shows you a school "dropping" between those two years, that's apples to oranges.

What about GreatSchools? By its own methodology, it builds a 1 to 10 rating from state test scores, growth data and, for high schools, college readiness, then ranks each school against others in the same state. It's an aggregator built on state data. The Report Card is the source, so that's where you'll want to finish.

What does this look like on a real address?

Joliet's the clearest example around here, because five main high schools serve homes with a Joliet mailing address. Here's each one on the 2025 Report Card, as percent proficient:

High school	District	2025 designation	English	Math	Science
Joliet Central	204	Targeted	28.0%	18.5%	27.2%
Joliet West	204	Commendable	38.3%	28.1%	38.5%
Plainfield Central	202	Commendable	54.7%	42.9%	56.5%
Plainfield South	202	Commendable	52.7%	38.8%	53.2%
Minooka Community	111	Commendable	60.9%	52.1%	51.7%

The state high school average was 51.7% in English and 39.3% in math. Plainfield Central and Minooka Community sit above it in both. Plainfield South sits above it in English and just under it in math. Joliet West and Joliet Central sit below it in both.

Now, notice what you'd learn from the labels alone. Four of the five are Commendable. That one word covers everything from 38.3% to 60.9% proficient in English. That's the whole case for reading past the designation.

All five are a 2025 baseline, so don't line them up against older years. And your address decides which row you're in, not the city name. That's why anyone moving to Joliet, IL should split the city by high school area before splitting it by price.

How do schools affect home prices?

Schools do show up in home prices, but the premium researchers can pin on the school itself is modest. The big gaps you see quoted mostly bundle the school with everything else about the neighborhood.

The best-known study, published in the Quarterly Journal of Economics in 1999, compared houses on either side of attendance boundaries inside the same school district. Same neighborhood, same taxes, same school spending. Only the elementary school changed. Buyers paid about 2.5% more for a 5% increase in test scores.

A 2007 study in the Journal of Political Economy came in lower, at less than 1% for the same 5% increase. A 2011 review of the research found house values rising by less than 4% for a one-standard-deviation increase in test scores.

On a $350,000 house, 2.5% is about $8,750, and under 1% is under $3,500. Those are illustrative, but they're the right size of number for you to carry into a showing.

Then there are headlines. Realtor.com found in 2016 that homes in districts rated 9 or 10 by GreatSchools sat 49% above the national median. That's a real comparison, but it isn't a price tag on the school, because those homes also differ in size, age, location and everything else.

You can see the same thing in Joliet. The 12-month median runs about $249,000 on the Joliet Central side and about $420,000 on the Plainfield South side. That $171,000 isn't a school premium. The Central side holds the oldest housing in the city. Almost everything on the Plainfield South side was built since 2000, and with only 37 sales a year, that median moves easily. You're comparing different houses, and the school's only one piece of what you'd be paying for.

Do you really pay for schools twice?

Yes. You pay once in the price and again in the property tax, and the two don't always move together.

Back to Joliet. At 2025 rates, before exemptions, a $350,000 house under the standard Joliet District 86 and District 204 code pays about $9,370 a year. The same $350,000 house in the part of Joliet served by Plainfield District 202 pays about $7,980. That's about $1,390 a year, or about $13,900 over 10 years at those rates. And the lower bill comes with the high schools posting the higher proficiency numbers.

So higher scores don't automatically mean you'll pay a higher tax rate. Once you know how property taxes work in Illinois, you can see why: a rate reflects what each district levies and how much property value it's spread across. It isn't a grade.

It works the other way, too. Lincoln-Way Community High School District 210 serves several towns, including New Lenox, Frankfort, Mokena, Manhattan and Tinley Park. Same high school district. But below it, the towns feed different elementary districts, and the prices don't line up at all.

Over the last 12 months, anyone moving to Manhattan, IL saw a median single family sale of about $444,000. New Lenox, IL ran about $470,000, and anyone moving to Frankfort, IL saw about $550,000. Same high school district, and you'd be looking at medians about $105,000 apart.

And the tax didn't follow the price. Manhattan runs about 3.3% of market value, Frankfort about 2.82% and New Lenox about 2.74%. The town with the lowest median carries the highest rate.

That's why you can't judge a district from the price, and you can't judge it from the tax rate either. Pull the actual bill on each parcel before you compare two houses, because Illinois property taxes are where two houses at the same price quietly come apart.

Does the school district matter if you don't have kids?

Yes, because the next buyer might.

In NAR's 2025 Home Buyers and Sellers Generational Trends report, 16% of buyers said the quality of the school district influenced where they bought. And in NAR's 2025 Profile of Home Buyers and Sellers, only 24% of buyers had children under 18 at home, a record low. So most buyers aren't shopping for a school, and you might not be either.

But you're not only buying for you. You're buying the house the next owner will look at. Getting the house right for the next 5 to 10 years means knowing where the district is heading, not just where it sits today.

Lincoln-Way shows what direction looks like. In August 2015, the board voted to close Lincoln-Way North, and it closed after the 2015-16 school year. The Chicago Sun-Times reported yearly deficits of roughly $5 million to $7 million and enrollment that came in lower than projected. In 2019, Shaw Local reported taxpayers still owed about $100 million on the bonds that built it. The school closed. The debt didn't.

That's why growth, graduation rate, attendance and district finances matter to you, even if you'll never sit through a school open house.

Can a real estate agent tell you which schools are good?

An agent can share objective school data with you. What an agent shouldn't hand you is an opinion.

On April 24, 2026, HUD issued a letter saying real estate agents and brokers "do not violate the Fair Housing Act merely by discussing with prospective homebuyers or renters the prevalence of crime or the quality of schools." HUD's announcement adds that sharing school information isn't a violation when it's provided consistently and without discriminatory intent. What's still illegal is steering, meaning directing buyers interested in equivalent homes to different areas based on race.

NAR's guidance lines up, and NAR says it's been consistent for decades. An agent should give you objective, factual information from a reliable third-party source. No subjective commentary, personal opinions or hearsay. And every client gets the same information you get. Illinois has its own fair housing law, though, and every brokerage sets its own policy, so some agents may do more or less than this.

That's the rule this whole article runs on. You won't find a school called good or bad here. You'll find the state's numbers and how to read them, the same for everyone. It's also why there's no "good for families" score anywhere in how I rate these towns. A town gets rated on what it has, never on who it suits.

The Bottom Line

Evaluating an Illinois school district isn't about finding the right ranking. It's about finding every school your address feeds, reading the state's numbers under the label, and confirming the boundary with the district.

Then do the other half and pull the tax bill on that parcel. The research says the school premium baked into a price is real but modest. The tax bill isn't modest, and you'll pay it every year you own the house.

Worst case scenario, you'll spend one evening on the Report Card and make one call to a district registrar. That's a lot cheaper than finding out on your first tax bill.

Last updated: October 2026

Frequently Asked Questions

What does Commendable mean on the Illinois Report Card?

Under the 2025 rules, it means a school met the state's conditions on student groups and graduation but wasn't in the top 10% statewide. About 73% of schools landed there, so it covers a wide range. Read the proficiency, growth and graduation numbers on the page to see where in that range your school sits.

How do I find out what school district an address is in, in Illinois?

Check the district's own boundary map or call its registrar, then confirm it against the parcel's tax bill, which lists every school district levying on that property. Don't rely on the mailing address, the ZIP code or a listing's school field. Only the district can tell you which building a child would attend.

Do school districts affect home prices?

Yes, but the part researchers can pin on the school itself is modest. Studies that strip out the neighborhood find roughly under 1% to about 2.5% more for a 5% increase in test scores. Bigger gaps you'll see quoted mostly reflect the neighborhood and the houses, not just the school.

Can I compare 2025 test scores to past years?

No. Illinois changed its proficiency cut scores in 2025, and the high school test switched to the ACT, so 2025 proficiency is a new baseline. Growth is the better signal for where a school's heading.

Does the school district matter if I don't have kids?

It matters when you sell. Only 24% of buyers in NAR's 2025 Profile had children under 18 at home, but the next buyer of your house might be one of them, and a district's direction over five to 10 years is part of what they'll be weighing.

Can real estate agents talk about school quality?

Yes. HUD's April 24, 2026 letter says discussing the quality of schools isn't, by itself, a Fair Housing Act violation. Steering is. NAR's guidance is to share objective data from a reliable third-party source, the same way with every client, and skip personal opinions.

If you're looking at a specific house, send me the address and I'll tell you which school districts levy on it and who to call to confirm the buildings.

Set up a time before you write an offer, and we'll run the schools, the tax code and the price on the specific homes you're considering, side by side, so you know what you're paying for twice.

Brian Wittman is a licensed real estate broker (Real Broker LLC), mortgage loan originator (NMLS #2646598, NEXA Mortgage, LLC, Equal Housing Lender), and life insurance producer (Levinson & Associates). This article is for educational purposes only and is not financial, lending, tax, or legal advice, an offer, or a commitment to lend; all loans are subject to credit approval. Information is accurate as of the publication date; for current details and full disclosures, visit https://bluejeanbroker.com/disclosures.