Pull up two different market pages for Marshfield this month and you can walk away with opposite conclusions about the same town. One shows Marshfield Center gaining value at a brisk clip. Another, describing the coastal village of Ocean Bluff-Brant Rock, shows prices falling by nearly the same margin. A third page about that same coastal village shows prices rising. All three numbers are real. None of them describes a market that actually moved that much.
The reason isn't hidden data or a market in chaos. It's arithmetic. Marshfield's villages sell homes in small enough batches that a single high-end closing or a single land sale can swing a monthly average by double digits, and different sites slice the same neighborhood's boundaries differently enough that they're sometimes not even describing the same set of houses. If you're comparing Marshfield's villages this fall, the percentage on the page is the least useful number on it.
The Village That Sold Seven Houses
Start with Marshfield Center, the town's historic village core. As of May 2026, one data provider's three-month trailing window puts the median sale price there at $890,000, up 11.2 percent from the same period a year earlier. That sounds like a village heating up.
Look at the sales behind it and the story gets thinner. Marshfield Center recorded seven closed sales in May 2026, down from eleven the year before. With eleven sales, one $1.5 million renovation and one $500,000 fixer both fit inside the average without moving it far. With seven, that same high-end sale can drag the median up by six figures on its own. An 11 percent gain built on seven transactions isn't a village-wide repricing. It's the arithmetic of a small denominator, and it will look different again next quarter if the mix of homes that happen to close shifts even slightly.
Same Label, Two Markets
Ocean Bluff-Brant Rock is where the contradiction gets sharper, because two different pages about the same neighborhood disagree with each other in the same season. One data cut, covering trailing twelve-month sales, puts the average sale price there at $751,329, down 9 percent from the year before. A separate page for the identical neighborhood, current as of August 2026, puts the median sale price at $702,000 to $725,000 depending on which module you read, up 11 percent year over year, on just seven active listings ranging from $329,000 to $1,399,000.
Median and average aren't measuring the same thing, and a neighborhood with a four-times spread between its cheapest and priciest active listing will produce very different answers depending on which one you ask. Add a wrinkle most portals gloss over: Ocean Bluff-Brant Rock is itself a combined label stitching together two of Marshfield's eight historic villages, Ocean Bluff and Brant Rock, and some sources fold nearby Rexhame into that same bucket while others count it as its own village entirely. A buyer comparing a cottage near Rexhame Beach to one three streets over on the Brant Rock seawall may be looking at homes that two different data providers don't even agree belong in the same dataset.
Marshfield's own citywide numbers show the identical pattern at a bigger scale. One market page puts the townwide median at $770,000, down 1.3 percent, using sales through November 2025. Another page on the same site puts it at $824,551, up 7.2 percent, using sales through June 2026, and lists the average house price separately at $941,000, up a striking 40 percent over the same stretch. A third source puts June 2026's median at $899,900 on 59 sales that month, a full $75,000 higher than the other reading for what should be the same window. None of these sources is wrong. They're measuring different date ranges, different metrics, and in some cases different sets of home types, and none of them says so in the headline number.
What This Table Actually Shows
| Geography | Metric | Value | Window | Direction |
|---|---|---|---|---|
| Marshfield (citywide) | Median sale price | $770,000 | Through Nov. 2025 | Down 1.3% YoY |
| Marshfield (citywide) | Median sale price | $824,551 | Through Jun. 2026 | Up 7.2% YoY |
| Marshfield (citywide) | Average house price | $941,000 | Recent month, 2026 | Up 40.4% YoY |
| Marshfield Center | Median sale price | $890,000 | 3 mo. through May 2026 | Up 11.2% YoY (7 sales) |
| Ocean Bluff-Brant Rock | Average sale price | $751,329 | Trailing 12 months | Down 9% YoY |
| Ocean Bluff-Brant Rock | Median sale price | $702,000–$725,000 | As of Aug. 2026 | Up 11% YoY (7 listings) |
Set side by side, the pattern is obvious. Every reading that swings hardest, in either direction, comes from the smallest sample or the widest metric mismatch. The steadier, larger-sample numbers, the citywide medians measured over fuller windows, move in the low single digits. That's a real town-level signal. The double-digit village swings are mostly noise dressed up as a headline.
Three Numbers to Ask For Instead of the Percentage
A percentage by itself tells you almost nothing about a village this size. Before you let one influence an offer or a listing price, ask for three things instead:
- The sale count behind it. A trend built on seven sales needs a different level of trust than one built on seventy.
- The spread, not just the middle. If the cheapest and priciest homes in the dataset are three or four times apart, the median and the average will tell different stories, and you want both numbers, not one.
- The exact streets included. Ask whether the boundary matches the blocks you're actually considering. Portals draw village lines differently, and a neighborhood label can quietly include or exclude Rexhame, Sunrise Beach, or the inland side of the village depending on the source.
Why This Matters If You're Comparing Villages This Fall
The lived difference between Marshfield's villages has never really been about a monthly percentage anyway. It's a view of the fairway from a cul-de-sac near Green Harbor Golf Club versus a short walk to the sand from a cottage off Bay Avenue. It's whether your morning coffee run is to SlackTide Coffee Roasters or a longer drive over to Marshfield Center. It's whether your kids spend Saturday mornings on the ballfields at Tower Avenue Park or riding bikes around the historic village green. Those differences are real and they hold up over time. A single month's swing in a seven-sale dataset does not, and it shouldn't carry the same weight in a decision that's really about the first kind of difference.
If you're weighing a purchase or a listing in Marshfield this fall, the more useful conversation starts with the actual comparable sales on the actual street, not the village-wide percentage a portal generated last week.
A Couple of Questions Worth Answering Directly
Does this mean Marshfield's coastal villages are getting cheaper? Not based on anything in the current data. The same neighborhood shows a gain on one page and a drop on another in the same season, which is the signature of a small, volatile sample rather than a real repricing in either direction.
How many sales does it take before a village trend is worth trusting? There's no fixed number, but a trailing twelve-month reading built on dozens of sales is worth far more than a single month's average built on seven or eight. When you can, compare at least two different time windows for the same neighborhood before treating either one as fact.
If you're trying to make sense of what a specific Marshfield street is actually doing, that's worth a conversation before you write an offer or set a list price, not after. Regan Peterman works across Marshfield and the rest of the South Shore and can walk you through the actual comparable sales behind any village's headline number. Schedule a private consultation to talk through your home's real market position.
