Search "Hillsborough NJ median home price" this month and you can land on six different numbers, each labeled as the current median, each pulled from 2026 data. One site puts it at $435,000. Another says $707,450. A third lands at $726,954. Niche shows $536,700. NextBurb shows $683,900. None of these sources made an error. They measured different things and gave the answer the same name.
That gap, nearly $292,000 for the same town in the same year, is the reason so many buyers comparing Somerset County towns end up more confused after research than before it. The median isn't a fixed fact you look up. It's a calculation, and the calculation changes depending on what's being counted, over what window of time, and inside what boundary line. If you're cross-shopping Hillsborough against Bridgewater against Somerville, understanding that mechanism matters more than memorizing any single figure.
Same Town, Same Year, Three Different "Medians"
Here's what's actually happening underneath those six Hillsborough numbers. Some are the median price of homes that actually closed in a specific recent stretch. Redfin's town-level figure, for example, reflects a median sale price of $435,000 over the three months ending in May 2026, down 6.5 percent from the same period a year earlier. That's a real transaction number, but it's also a small, moving window, and it only counts homes that sold.
Other figures are estimates of every home in town, whether it's for sale or not. Realtytrac's $726,954 is described as a median estimated home value, a modeled number covering the full housing stock. Niche and NextBurb publish similar modeled figures, which is why they land in yet another range entirely.
Then there's boundary drawing. Redfin's own data for the 08844 zip code, which covers most of Hillsborough, shows a median sale price of $620,000 over that same three months ending in May 2026, up 22.7 percent year over year, a very different trend line than the township-level figure pulled from the same company. Same company, same window, different footprint, different answer.
| Source | Reported Figure | What It's Measuring | Window |
|---|---|---|---|
| Redfin (township) | $435,000 | Closed sales | 3 months ending May 2026 |
| Redfin (zip 08844) | $620,000 | Closed sales | 3 months ending May 2026 |
| Movoto | $707,450 | Closed sales | March 2026 |
| Realtytrac | $726,954 | Modeled estimated value | Current listing data |
Why the Numbers Refuse to Line Up
Three mechanics explain almost every gap you'll run into while comparing Somerset County towns online:
- Sold versus estimated. A closed-sale median only counts homes that actually changed hands in the window. A modeled "home value" estimate includes every property in town, sold or not, which pulls the number toward the broader housing stock rather than what buyers are currently paying.
- Snapshot versus trailing average. A single month's median can swing hard if a handful of large or small sales close in that window, especially in a town where only 25 to 50 homes sell in a typical month. A three-month rolling average smooths that out but reports a different number for the same period.
- Where the line gets drawn. A township boundary, a zip code, and a specific neighborhood inside that township are three different populations of homes, even when they overlap on a map. Hillsborough township and zip 08844 aren't identical, and neither is identical to any single subdivision inside it.
None of this means the data is unreliable. It means the label "median home price" is doing a lot of unspoken work, and two people using different sites can both be technically correct while describing two different markets.
Somerset County Doesn't Have One Market. It Has Dozens, Inside Each Town.
The zoom-level problem gets sharper once you look inside a single town rather than across the whole county. Bridgewater's township-wide median sale price was $674,596 in May 2026, down 2.9 percent from a year earlier, a fairly typical read for a large, established Somerset County town. But Redfin also tracks a specific pocket inside Bridgewater called Bridgewater Center separately, and that pocket's median sale price was $899,510 in June 2026, up 21.2 percent year over year. Over the three months ending in May, the same pocket showed a $1.1 million median, up 34.2 percent from the year before.
That's not two different towns. That's one township, reported at two different resolutions, producing medians nearly half a million dollars apart depending on which slice you're reading. If a buyer is told "Bridgewater's median is $675K" and then tours a $1 million listing in Bridgewater Center, the confusion isn't the listing. It's that the township-wide figure was never describing that pocket to begin with.
Zoom out to the full county and the spread only widens. Somerset County home values currently range from roughly $76,000 up to nearly $10 million, with Far Hills carrying the county's highest median listing price at $2,425,000 and Franklin Park sitting near the low end at an average around $375,000. A single "Somerset County median" collapses that entire range into one figure that describes almost nothing about any specific street.
There's a naming wrinkle on top of all this worth flagging directly: "Somerset" is also the name of a specific community inside Franklin Township, distinct from Somerset County as a whole. Zillow's home value estimate for that Somerset community was $581,943 as of the end of July 2026, while its estimate for Somerset County overall was $666,817 as of the end of August 2026. Anyone searching "Somerset home prices" without specifying which one they mean will get answers to two different questions.
The Number That Actually Behaves
If headline medians move around this much, what should a buyer comparing towns actually anchor on? Price per square foot tends to hold together better across sources than a raw median, because it corrects for the fact that towns and pockets within them aren't selling the same size or type of home in any given window.
Somerset County's median sale price per square foot sits at $349, up 3.6 percent year over year, as of this September. Bridgewater's is $365, up 6.1 percent as of its March 2026 reporting. Hillsborough's is $347, up 1.5 percent over the three months ending in May 2026, while the Bridgewater Center pocket runs far hotter at $481 per square foot, up 16.3 percent over that same window. These figures still vary by neighborhood, but the spread is far narrower and the trend direction is more consistent than what you'll see comparing raw medians pulled from different platforms.
For a buyer trying to decide whether Hillsborough or Bridgewater fits the budget better, price per square foot against a specific home size and condition gets you a usable comparison. A township-wide median pulled from a single site does not.
What's Shifting Inside the County Right Now
There's a current-market wrinkle worth knowing if you're actively comparing housing types, not just towns. Somerset County's single-family inventory tightened by roughly 10 homes in early September 2026, while condo inventory ticked up slightly over the same stretch. The most recent full-month county data available, from July 2026, shows a market that remains competitive while gradually moving toward better balance, with well-presented single-family homes near the county median still drawing attention even as buyers get a bit more room to negotiate than they had during the tightest stretch of the past few years.
That split matters for how you shop. If you're set on a detached single-family home near the county's price range, being ready to move quickly when the right listing appears still counts. If you're open to a townhome or condo, you may find a little more room to look around than you did earlier this year. Bridgewater and Hillsborough both illustrate the current pace: homes in both towns are typically going under contract in roughly three weeks, with sellers seeing multiple offers on well-prepared listings, according to Redfin's current tracking.
How to Actually Compare Two Somerset County Towns
Before treating any published median as a planning number, ask what it's measuring. Is it a closed-sale figure or a modeled estimate of the whole housing stock? What window does it cover, a single month or a rolling average? And what boundary is it drawn around, a township, a zip code, or a specific neighborhood pocket inside it?
Once you know the answer, the more useful comparison is price per square foot against homes of similar size, age, and condition, in the specific streets or pockets you're actually considering, not the town label as a whole. If you want to track the county's pace over time, the Federal Reserve Bank of St. Louis publishes a monthly median days-on-market series for Somerset County sourced from Realtor.com data, which gives a consistent, methodology-stable read you can watch month over month.
A Few Questions Worth Asking Early
Is Somerset County currently a buyer's market or a seller's market? Based on the most recent full-month data available, from July 2026, it's still competitive, particularly for single-family homes near the county median, though buyers have slightly more breathing room than during the tightest recent stretch. Condo inventory has been loosening while single-family inventory has been tightening.
Why do Zillow and Redfin show different numbers for the same town? Zillow's headline figure is typically a modeled estimate of every home in the area, called the Zillow Home Value Index. Redfin's headline figure is typically a median of homes that actually closed within a specific recent window. Both are legitimate measurements of different things.
Is "Somerset" the town the same market as Somerset County? No. Somerset is a specific community inside Franklin Township, with its own home value estimate separate from the county-wide figure. Searching one without specifying which will return an answer to the wrong question.
If you're weighing Hillsborough against Bridgewater, or trying to figure out what a specific budget actually buys in a specific pocket of Somerset County, a conversation grounded in matched comps beats another minute scrolling conflicting medians. Cheryl Brunetti works Somerset and Hunterdon County transactions daily and can walk through what the numbers on any given street actually mean for your search. Let's connect.