Open two listings side by side. One sits in Hillside, one in Elizabeth. The Hillside home is priced lower. On a spreadsheet, lower price should mean lower cost.
It doesn't, and the reason has nothing to do with the house itself.
Hillside's median home price runs $363,200, the lowest in this comparison. Its property tax rate sits at 2.53%, well above Elizabeth's 2.072%. Run the math and Hillside's annual tax bill lands under $9,200, while Elizabeth, with a higher median price of $393,500, comes in lower at roughly $8,153. The cheaper house costs more to hold every year.
The Number the Listing Photo Doesn't Show
Union County has 21 municipalities, and each one certifies its own property tax rate based on its own school, municipal, and county budget needs, plus the size of its local ratable base. That independence is why rates across the county swing from roughly 1.554% up to just over 3%, a spread wide enough to change a buyer's math even when two homes sell for nearly the same price.
It's worth pausing on how slippery the county's own "median price" is before drilling into individual towns. Zillow's tracker put the average home value across Union County at $636,731 as of July 2026, up 1.6% over the past year. That single number already depends on which month you check and which methodology built it, and it will keep moving. The town-level tax rate is the steadier thing to anchor a real comparison to, because it changes once a year on a certified schedule rather than every time a new batch of sales closes.
Here's what that comparison looks like when you line up six Union County towns side by side:
| Town | Median Home Price | Effective Tax Rate | Approx. Annual Tax Bill |
|---|---|---|---|
| Elizabeth | $393,500 | 2.072% | ~$8,153 |
| Linden | $387,200 | 2.201% | under $8,600 |
| Hillside | $363,200 | 2.53% | under $9,200 |
| Plainfield | $383,300 | 2.589% | under $10,000 |
| Scotch Plains | $696,900 | 2.204% | over $15,000 |
| Westfield | — | — | up to $17,866, the county's highest actual bill |
Plainfield carries one of the higher rates on this list, but its price keeps the bill under $10,000, and the city has been investing in downtown development that's kept it competitive with lower-tax neighbors. Scotch Plains tells the opposite story. Its rate is actually lower than Hillside's, but its price is nearly double, and that price is what pushes the bill past $15,000. At the low end of the market, rate does most of the work. At the high end, price takes over.
The Corridor Test: Same Train, Different Bill
Two commuter rail corridors cut through Union County, and they make a useful second test of the same idea. NJ Transit's Raritan Valley Line runs through Cranford, Westfield, and Plainfield. The Northeast Corridor Line runs through Linden and Rahway. Summit sits on a third option, the Morris & Essex Line, with a direct commute into New York City.
- Raritan Valley Line: Cranford, Westfield, Plainfield
- Northeast Corridor Line: Linden, Rahway
- Morris & Essex Line: Summit
All three corridors put a buyer on a train toward Newark or New York, but the cost of buying into that access is not uniform. Summit carries the county's highest median listing price at $1,437,500, a premium for the direct commute that has little to do with its tax rate and everything to do with what buyers are willing to pay for convenience. Westfield, on the same Raritan Valley corridor as Cranford, carries the county's highest actual annual tax bill at $17,866, and towns with premium school district reputations like Westfield tend to post the county's highest bills. Clark, Fanwood, and Scotch Plains have historically sat toward the more moderate end of the county's rate range while still keeping NJ Transit access within reach, which makes them worth a second look for a buyer who wants the corridor without paying Westfield or Summit's full premium.
The Anomaly That Proves the Rule
Winfield Township is the extreme case, and it's worth understanding even if you never buy there, because it shows exactly how a tax number can lie if you don't know what's behind it.
At 0.20 square miles, Winfield is Union County's smallest municipality, home to about 1,467 residents as of the 2020 census. It was built in 1941 to house defense industry workers, and instead of converting to conventional deeded homeownership afterward, it became the Winfield Mutual Housing Corporation, a cooperative where the corporation holds a single deed and individual households buy a membership share rather than a house.
That structure produces a startling number. Tax data pulls put Winfield's effective rate above 22%, technically the highest in New Jersey. If Winfield were folded into the county average the way every other town is, Union County's overall rate would jump from roughly 2.2% to nearly 3.2%.
But that number describes an accounting structure, not a household budget. The cooperative divides its tax obligation across the membership collectively, and even without factoring in the deductions the township offers for veterans, senior citizens, and residents with disabilities, an individual member's bill runs closer to $5,321, paid through the cooperative's monthly charge rather than a separate quarterly tax bill.
Winfield is the loudest version of a quiet lesson the rest of the county already teaches: a rate by itself tells you nothing about what a household actually pays, and a price by itself tells you nothing about what a rate will do to it. You have to hold both numbers at once, and in Winfield's case, you have to understand the ownership model behind the number before it means anything at all.
Before You Write an Offer in Union County
- Ask for the current tax bill on the exact property, not the town's average rate. Assessments vary parcel to parcel even within the same street.
- Add the tax line to your monthly cost math before comparing two listings by sale price alone.
- If a rate looks unusually high or low for the town, ask why. In most cases it's a school or municipal budget question. In Winfield, it's a different ownership model entirely.
- Confirm which rail line a town sits on and check NJ Transit's current Raritan Valley Line schedule directly rather than assuming price alone reflects commute value.
Rates are certified annually and can shift year to year, so any figure here should be confirmed with the municipal tax assessor before you build an offer around it. New Jersey's own property tax transparency portal is a reasonable starting point if you want to see how a town's revenue picture is built before you buy into it.
Common Questions
Why do two Union County towns with similar home prices have such different tax bills? Because each municipality certifies its own rate independently, based on its own school, municipal, and county budget needs and the size of its local ratable base. Price and rate move independently of each other, which is why the same purchase price can carry a materially different bill depending on where it sits.
Is Winfield Township's high tax rate something buyers should worry about elsewhere in the county? No. The rate above 22% is specific to Winfield's cooperative housing structure through the Winfield Mutual Housing Corporation and doesn't reflect a similar risk in the county's other 20 municipalities, which all use a standard deeded ownership model.
How do I find a town's current effective tax rate before making an offer? The Union County Board of Taxation, based in Elizabeth, certifies rates annually, and each municipal tax assessor's office can confirm the current figure for a specific address before you write an offer.
Sale price is the easiest number to find and the least complete one. If you're comparing towns across Union County and want the full carrying cost picture, not just the number on the listing, BQUEST Realty works these comparisons every week across northern and central New Jersey, in English, Spanish, and Portuguese. Request your free home valuation and we'll walk the real numbers with you before you write an offer.
