North Plainfield’s town-wide numbers. 103% of list over 42 days across 129 sales. Are a blend of two markets that do not resemble each other. Twenty-eight one-bedroom sales at a $221,250 median took 49 days and closed at 101%, while houses at $440,000 and $540,000 ran 107% and 105% in 30 and 33 days. The condominium end is slow and flat; the house market is quick and competitive. Read the tier you are actually in, not the borough average. North Plainfield is a borough in Somerset County and a separate municipality from Plainfield City, which lies immediately south across the Green Brook in Union County.
Data sourced from the Garden State MLS (GSMLS), August 2025 through July 2026.
The 129 sales broken out below. This is a borough where the tiers genuinely disagree, so read by price rather than by bedroom count. The dollar figure is what a buyer is actually competing at.
| Bedrooms | Sales | Median sale | Avg days | Sale-to-list |
|---|---|---|---|---|
| 1 | 28 | $221,250 | 49 | 101% |
| 2 | 11 | $440,000 | 30 | 107% |
| 3 | 54 | $482,000 | 48 | 103% |
| 4 | 29 | $540,000 | 33 | 105% |
| 5+ | 7 | $530,000 | 31 | 100% |
| Town total | 129 | $472,000 | 42 | 103% |
Houses at $482,000 are the largest single segment in the borough. 54 sales, 103% of list, 48 days. That is the median North Plainfield transaction in practice, and the 48-day figure is the one buyers should notice: at this price, in this borough, you have close to seven weeks of market rather than a weekend.
The sharpest bidding is above it. At $540,000, 29 sales closed at 105% in 33 days, and at $440,000, 11 sales closed at 107% in 30 days. The strongest ratio and among the fastest paces on the page. Both of those bands are meaningfully hotter than the borough figure suggests. If you are shopping a house here rather than a condominium, budget for competition and for a shorter decision window than the 42-day headline implies.
At $221,250 the picture reverses completely. Twenty-eight sales. More than a fifth of the borough’s volume. Closed at 101% over 49 days, the longest average marketing time and the smallest premium in North Plainfield. This is a real and substantial segment, not a rounding error, and it is what pulls the borough-wide averages down and slows them.
The five-bedroom-and-larger row shows 7 sales. That is too few to describe a segment, and no claim on this page rests on it.
Split your expectations by price band, because the borough average will mislead you in both directions.
Around $221,250, in the condominium and small-unit market, you are in the calmest segment covered anywhere on this site. 101% of list over 49 days. Take the time. Read the association documents, check reserves and understand what the monthly carrying cost actually is before you talk price.
Around $440,000 to $540,000, where the houses are, it is a different market: 105% to 107% of list on a 30-to-33-day clock. Be pre-approved, know your ceiling, and expect to go over asking. In the middle, at $482,000, you get the best of both. 103% and 48 days, which is enough room to get a contractor through the house before you commit.
Do not let anyone price your house off the borough-wide 103%. If you are selling a four-bedroom house, your tier closed at 105% in 33 days and the borough figure is understating you. If you are selling a one-bedroom unit, your tier closed at 101% in 49 days and the borough figure is flattering you. Plan for a longer marketing period and resist the urge to cut at week four.
The house tiers are also where presentation pays. At 30 to 33 days on market, buyers in the $440,000 to $540,000 range are making decisions quickly, and photography and condition are doing most of the work in that window.
In North Plainfield this covers every seller in the borough. The highest median in any tier here is $540,000. Lot size decides which of two very different outcomes you get.
On a smaller lot, a home needing significant work gets no premium. It sits, and it sells at or below asking. That is a large part of what the 48-day average at $482,000 is describing: not weak demand for the neighbourhood, but buyers pricing in work on properties where the ground offers no compensating value.
On a half acre or more, the same house becomes a different asset entirely. It turns into a builder target, and the buyer is paying for land rather than for the house. North Plainfield’s older sections include large nineteenth-century properties on generous lots, and owners in that position are routinely priced off tired-house comparables. Valued as a worn-out house on a street of worn-out houses, when the land underneath is the real asset. In a borough where nothing trades above $540,000 at the tier level, that misjudgement can be the single largest number in the transaction.
Ryan Horvath is a Prominent Properties Sotheby’s International Realty agent and a former licensed New Jersey general contractor. Having a vendor network that will put a real number on the work, and whether a lot carries builder value. Is the difference between those two outcomes. Buyers should take the same rule as a warning: on a large North Plainfield lot you are bidding against builders, not only against other households.
The first comparison to get right is the one across the brook. Plainfield City, in Union County, closed at a $515,000 median and 102% of list over 44 days. South Plainfield, a third and separate borough in Middlesex County, closed at $600,000 and 102% over 35 days. Three different municipalities, three different counties, three different school districts and tax rates, and medians within roughly $130,000 of one another, which is exactly why they get confused.
Within Somerset County, Bedminster is the closest price match at a $495,000 median and 102% of list, though it is a very different sort of township. The contrast that matters most is the one directly uphill: Watchung, adjacent in the same county, closed at $999,999 at exactly 100% of list. More than double the price, and no bidding premium at all. Bernards Township, further west, closed at $900,000 and 103%. North Plainfield is the affordable entry into this stretch of Somerset County, and unlike the towns above it on the mountain, its house tiers are actually competitive.
North Plainfield does not have its own NJ Transit station, but it is unusually well placed for one. The Plainfield and Netherwood stations sit just across the Green Brook in Union County, and the Bound Brook and Somerville stations lie to the west. All four on the Raritan Valley Line. That line runs east into Newark Penn Station, where most riders transfer for New York Penn Station or PATH rather than continuing on a single seat. Route 22 runs directly through the borough and Interstate 287 is a short drive west.
North Plainfield operates its own district, the North Plainfield School District, serving the borough from elementary through high school. The high school is North Plainfield High School. It is not a regional district, and it is entirely separate from the Plainfield and South Plainfield districts despite the shared name.
North Plainfield is a compact borough in Somerset County, bounded on the south by the Green Brook, which is also the county line, and rising northward into the Watchung Mountains. That topography is the borough’s defining feature: the lower, flatter streets near the brook are denser and closer to the Plainfield grid, while the land climbs steeply behind them.
The housing stock is mixed in a way that explains the split in the data. Somerset Street and the older sections carry substantial nineteenth-century and early twentieth-century houses, some of them large; elsewhere there is a considerable body of mid-century housing and multi-family and condominium stock, which is why 28 one-bedroom sales appear in a borough of this size. Route 22 runs through the middle of town and carries most of its commercial activity.
The median residential sale price in North Plainfield was $472,000 across 129 sales recorded in GSMLS between August 2025 and July 2026. By tier the medians ran $221,250 for one-bedroom homes, $440,000 for two, $482,000 for three and $540,000 for four.
It depends entirely on your price band, and the borough-wide 103% hides that. The house tiers are a firm seller’s market. $440,000 at 107% in 30 days and $540,000 at 105% in 33 days. The $221,250 tier is much softer, at 101% over 49 days, which is the closest thing to buyer’s-market conditions in this part of Somerset County.
The average was $440,140 against a $472,000 median. An unusual arrangement, and the one-bedroom segment is the reason. Twenty-eight sales at a $221,250 median sit far below everything else in the borough, dragging the average down while the median stays up with the houses. It is a signal that North Plainfield contains two distinct property markets rather than one continuous price range.
No. North Plainfield is a borough in Somerset County; Plainfield is a city in Union County, immediately south across the Green Brook. They have separate governments, separate tax rates and separate school districts. Their markets are also distinct: North Plainfield closed at a $472,000 median and 103% of list, Plainfield at $515,000 and 102%. South Plainfield is a third borough again, in Middlesex County, at $600,000 and 102%.
Sales above $1,000,000 in North Plainfield trigger New Jersey’s Graduated Percent Fee, formerly the “mansion tax.” Since July 10, 2025 it is paid by the seller rather than the buyer, starting at 1% of the entire sale price and rising with price. Because the rate steps up at fixed thresholds, a sale crossing one by a small margin can cost more than it gains. See the New Jersey mansion tax seller’s guide for the brackets and where the thresholds fall.
Market data derived from Garden State MLS (GSMLS), August 2025 through July 2026. Statistics reflect residential sales and are not a guarantee of future results.
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