Greater Princeton Area Market Report
September 2026: The Slowdown Reached the Closings
Key Market Statistics, September 2026
The figures below are trailing-12-month median single-family prices across the eight Greater Princeton Area towns we track (Princeton, Montgomery, West Windsor, Plainsboro, Hopewell, Lawrence, South Brunswick, Robbinsville) as of September 30, 2026, matching the live numbers on our market data page. West Windsor and Plainsboro are split by BrightMLS MLS Area (not city, which mislabels many West Windsor homes with a "Princeton" mailing address). Senior / 55+ housing is excluded. Days on market and list-to-sale are the latest trailing figures shown on that page. Data is sourced from BrightMLS.
- Princeton: Median $1,710,000 · ▲$10K vs. August · 16 days on market · 100.0% list-to-sale
- Montgomery: Median $1,043,812 · ▼$36.2K vs. August · 15 days on market · 100.6% list-to-sale
- West Windsor: Median $1,137,000 · ▲$2K vs. August · 12 days on market · 101.5% list-to-sale
- Plainsboro: Median $1,027,000 · Flat vs. August · 21 days on market · 99.8% list-to-sale
- Hopewell: Median $835,000 · ▲$8K vs. August · 16 days on market · 100.0% list-to-sale
- Lawrence: Median $650,000 · ▲$18K vs. August · 16 days on market · 100.0% list-to-sale
- South Brunswick: Median $850,000 · Flat vs. August · 23 days on market · 100.0% list-to-sale
- Robbinsville: Median $931,000 · ▼$9K vs. August · 19 days on market · 99.5% list-to-sale
What Happened in September: The Homes That Sold Started Selling Slower
Last month the story was a split market. Homes that were prepared and priced right still sold in about two weeks, often above ask, while everything else joined an unsold pile that aged in every town we track. In September the pile mostly stopped aging, and the softness moved somewhere more important: into the closings themselves.
Start with the measure we report every month. Across all eight towns, 36% of September's closings finished above their original list price, against 47% in August and 49% in September 2025. Median time on market for those closings was 20 days, up from 16 in August.
Look only at resales, homes built before 2024, so Hopewell's builder deliveries do not distort the picture. Across all eight towns, September's resale closings took a median 20.5 days to go under contract, up from 16 in August and 18.5 in September 2025. Only 40% sold above their original list price, against roughly half all summer and 50% a year ago. And 53% sold below their original list price, the highest share since February and well above the 37% of September 2025. Some lengthening in September is seasonal, which is why the comparison that matters is against last September, and on every one of those measures this September is weaker.
Volume points the same way. The eight towns closed 106 resales in September against 128 a year ago, down 17%, after August ran 20% below its prior-year pace. Across all eight towns we track, closings through September total 1,196 against 1,235 a year ago, down 3%. Strip out Hopewell, where new construction keeps adding closings, and the other seven towns are down 11%, from 1,007 to 892. September's count will rise a little as late closings report, as it does every month, but the gap to last year is too wide to close that way.
The unsold side, by contrast, held still. After aging in all seven inventory groups in August, active listings got older in only two this month: Montgomery, from a 43-day median to 48, and Robbinsville, from 36 to 42. Princeton (76 to 78 days), Lawrence (48 to 49), Hopewell (32 to 31) and the West Windsor-Plainsboro district (46 to 45) were essentially flat, and South Brunswick got newer, from 40 days to 36. That is not a recovery. Much of the stale inventory is being repriced: the share of Princeton listings that have cut price jumped from 27.9% to 41.0% in a month, Hopewell's from 36.2% to 48.4%, and South Brunswick's from 22.2% to 36.0%. Sellers are meeting the market, and September's closings show the prices they are meeting it at.
Town by Town
Princeton's trailing median edged up $10,000 to $1,710,000, a new high in our records back to 2016 and 10.3% above a year ago. Treat it as a lagging number. It counts twelve months of sales, most of them agreed in spring, and the trailing sale count inside it has kept shrinking. Princeton closed only nine homes of any type in September against 17 a year ago, and its year-to-date volume is down 16%. Its 61 active listings still carry the oldest inventory in the corridor at a 78-day median, and four in ten have now cut price. The sold side is intact at a 16-day trailing median and 100.0% of list. What September changed is how many sellers have accepted that the spring price is no longer the price.
West Windsor remains the strongest market on every trailing measure, up $2,000 to $1,137,000 with the corridor's fastest 12-day median and its firmest 101.5% list-to-sale. September was a thin month there, with only seven non-senior closings against 24 a year ago, and its year-to-date volume is down 11%. Its active listings carry a 49-day median, and 45.2% have cut price. Montgomery recorded the largest decline in the group, down $36,188 to $1,043,812, and it is one of only two towns, with Robbinsville, where the unsold side kept deteriorating, with active listings aging from 43 days to 48. In a town with 88 non-senior single-family sales in the trailing year, a single month can move the median this much, so I read it as a warning rather than a trend. Its trailing 100.6% list-to-sale is still above ask.
Lawrence posted the largest gain, up $18,000 to $650,000, and was the quickest town on September closings with a 10-day median. Its unsold side improved as well: active listings fell from 64 to 58, and the share with a price cut dropped from 48.4% to 43.1%. As the corridor's entry-level market, it is the most rate-sensitive town here, which makes the next two months worth watching closely with the 30-year fixed now above 7%. Its year-to-date volume is down 11%.
Hopewell rose $8,000 to $835,000. Its 33% year-to-date gain in closings, 304 against 228, is still a new-construction story: homes built in 2024 or later account for 94 closings this year against 24 last year, while everything else is roughly flat at about 210. Fourteen of its 34 September closings were new builds, ten in Hopewell Parc and three in The Collection at Hopewell. Its 55.6% below-original-list share across the trailing year again splits into two markets: 82.6% for new construction, where builders list high and close with credits, and 43.3% for resale, in line with its neighbors. Its active inventory grew from 80 to 93 listings, and the share with a price cut rose from 36.2% to 48.4%, one of the three sharpest jumps in the corridor alongside Princeton and South Brunswick.
Plainsboro held flat at $1,027,000 and remains the softest town in the corridor. Its 99.8% list-to-sale is one of only two below 100% among the eight towns, alongside Robbinsville, the highest below-original-list share across the trailing year at 62.3%, and the steepest year-to-date volume decline at 24%. None of its nine September closings sold above original list. Its trailing time on market eased slightly from 22 days to 21, and 54.4% of its 57 active listings have cut price. It is still where buyers have the most room.
Robbinsville gave back $9,000 to $931,000 and is the second town whose unsold inventory kept aging, from 36 days to 42, though its September closings were busy at 22 against 16 a year ago. At 99.5% list-to-sale it still closes below ask. South Brunswick held flat at $850,000; its August figure has since been revised up from the $843,500 we published as late closings reported. Its active listings got newer and grew from 18 to 25, but the share with a price cut jumped from 22.2% to 36.0%, and its year-to-date volume is down 16%.
Rates and the Macro Backdrop
September brought the change in financing costs that buyers had been hoping would go the other way. At its September 15-16 meeting the Federal Reserve raised its benchmark rate by a quarter point to 3.75% to 4.00%, its first increase since 2023, on a unanimous 12-0 vote, citing inflation that remains elevated. Its updated projections point to the possibility of one more increase before year end. Mortgage rates moved with it: Freddie Mac's 30-year fixed averaged 7.03% for the week ending September 24, up from 6.66% at the end of August and 6.30% a year ago. The next Fed meeting is October 27-28.
New Jersey's job market did not repeat July's sharp drop, but it did not recover either. The state lost 1,700 nonfarm jobs in August and is down 9,900 over the year, with the private sector down 13,100. The unemployment rate slipped 0.1 point to 4.3%. Last month I said a softening labor market combined with rates that would not come down was the combination that could turn this selective market into a slower one. Rates have now gone up instead of sideways, and September's closings are the first sign of that combination showing up in the data.
Charlie Wu Market Insight
Charlie Wu Market Insight
The trailing medians say nothing happened in September. Princeton set another record at $1.71 million and six of eight towns were up or flat. Those numbers are twelve months long and mostly made of spring deals. The September closings are the part of the data that is current, and they changed. Resales took a median 20.5 days instead of 16, more than half sold below their original ask, and the eight towns closed 17% fewer resales than a year ago. Meanwhile the Fed raised rates for the first time since 2023 and the 30-year fixed crossed 7%. Last month I said the market had sorted itself into two piles. This month the good pile got smaller and slower.
For buyers: this is the first fall in a while where you can negotiate on homes that are not stale. Ask for the original list price and the days on market on everything, because a home at 30 days is now normal rather than a warning sign. Plainsboro and Princeton's repriced listings are where the most room is. Lock your rate when you are under contract; nothing in September suggests it is coming down soon. For sellers: the price you list at in October is competing with 7% money and a buyer who knows half the homes are selling below ask. Price to where the market is now, not where your neighbor sold in May. Prepared and priced right, you will still sell, but plan for three to four weeks rather than one weekend, and if you are already listed and past 45 days, a meaningful reduction now beats two small ones later.
Data Table, Greater Princeton Corridor
| Town | Median Price | vs. August 2026 | Median DOM | List/Sale | Notes |
|---|---|---|---|---|---|
| Princeton | $1,710,000 | ▲ $10K | 16 days | 100.0% | New high, but 9 closings in September; price-cut share up to 41.0% |
| Montgomery | $1,043,812 | ▼ $36.2K | 15 days | 100.6% | Largest decline; one of two towns whose unsold listings kept aging |
| West Windsor | $1,137,000 | ▲ $2K | 12 days | 101.5% | Fastest and firmest trailing figures; thin September, YTD volume down 11% |
| Plainsboro | $1,027,000 | Flat | 21 days | 99.8% | Softest in the corridor; YTD volume down 24%, 54.4% of listings cut |
| Hopewell | $835,000 | ▲ $8K | 16 days | 100.0% | Volume up 33% YTD on new construction; price-cut share up to 48.4% |
| Lawrence | $650,000 | ▲ $18K | 16 days | 100.0% | Largest gain; fewer active listings and fewer price cuts |
| South Brunswick | $850,000 | Flat | 23 days | 100.0% | Inventory newer, but price cuts up to 36.0%; YTD volume down 16% |
| Robbinsville | $931,000 | ▼ $9K | 19 days | 99.5% | Unsold listings aged again, 36 to 42 days; closes below ask |
Source: BrightMLS · Trailing-12-month median, single-family, senior housing excluded · DOM and list/sale from the latest closed market snapshot · West Windsor / Plainsboro split by MLS Area · August medians revised slightly as late closings reported (Montgomery $1,080,000, West Windsor $1,135,000, South Brunswick $850,000), and the changes above are measured from the revised figures · Resale figures exclude homes built 2024 or later · Monthly closing counts are as exported on September 30 and revise upward as late closings report · Through September 30, 2026