A buyer stands on the pedestrian walkway of the New Hope-Lambertville Bridge on a Saturday afternoon, comparing two open houses on a phone screen. One sits on a side street in New Hope, Pennsylvania. The other is a few blocks off Bridge Street in Lambertville, New Jersey. Similar square footage. Similar asking price. Similar view of the same river, depending on which railing you lean against.
What the listing photos don't show is that these two houses belong to different tax jurisdictions that behave nothing alike once you get past the number on the sign. The bridge itself runs about 900 feet bank to bank. The gap between what each side will actually cost a buyer this year, and a seller at the closing table, runs a lot wider than that.
The Bridge Is Short. The Distance Between the Numbers Isn't.
New Hope and Lambertville get marketed as a single river-town experience, and for dining, gallery-hopping, and towpath walks, that's fair. For a real estate transaction, treating them as one market misses the point. One town sits in Bucks County, Pennsylvania. The other sits in Hunterdon County, New Jersey. The state line runs down the middle of the Delaware, and it carries a full set of separate rules for property tax, transfer tax, and what happens to a seller's proceeds at closing.
A buyer comparing list prices on a portal sees two similar numbers and assumes the decision comes down to preference. It doesn't. It comes down to which side of that line the deed gets recorded on.
What Hunterdon County's Tax Bill Does to the Math
Property tax is the part that shows up every year, not just once at closing, and it's where the two towns diverge hardest. Hunterdon County, where Lambertville sits, carries the highest average property tax bill in New Jersey, at roughly $8,523 a year, or about 1.91 percent of median home value, according to county-level tax data compiled for 2026. Pennsylvania's statewide average effective property tax rate sits closer to 1.30 percent as of a May 2026 comparison. Bucks County's actual bill on any given property depends on the specific township, municipal levy, and school district, but it lands in a materially lower range than Hunterdon's.
That gap compounds. A buyer financing a home with an escrowed tax payment feels it every month, not just on the April bill. It also means the "cost" of a Lambertville home isn't the purchase price. It's the purchase price plus a permanently higher annual carrying cost that a comparably priced New Hope home simply doesn't have.
The state line is doing more to your monthly payment than your choice of kitchen finishes ever will.
The Sale Nobody Sees Coming: New Jersey's New Mansion Tax
Property tax is the cost a buyer plans for. The cost that catches people off guard shows up at the closing table, and New Jersey rewrote its rules on this just over a year ago.
Through July 9, 2025, any New Jersey home selling for $1 million or more triggered a flat 1 percent "mansion tax," paid by the buyer, on top of the state's standard Realty Transfer Fee. Governor Phil Murphy signed a budget-linked overhaul on June 30, 2025, effective for contracts executed on or after July 10, 2025, that changed two things at once. First, the obligation shifted from buyer to seller. Second, the flat 1 percent became a tiered schedule that climbs as the price climbs: 1 percent from $1 million to $2 million, 2 percent from $2 million to $2.5 million, 2.5 percent up to $3 million, 3 percent up to $3.5 million, and 3.5 percent above that.
The detail that trips people up is how the tax applies. It's not calculated on the amount above each threshold. It applies to the entire sale price once a deal crosses into a tier. A New Jersey home that sells for $2.2 million falls into the 2 percent bracket, which means the tax is 2 percent of the full $2.2 million, or $44,000, not 2 percent of the $200,000 above the $2 million line. And under the current law, that $44,000 comes out of the seller's proceeds, not the buyer's closing costs.
This also isn't a tax reserved for waterfront mansions. It applies to any qualifying single-family home, condo, or cooperative unit at or above $1 million, regardless of size or style, which means a well-updated Lambertville home on a smaller lot can trigger it just as easily as a larger estate outside town.
Pennsylvania's Flatter, Simpler Toll
Cross the bridge and the picture changes. Pennsylvania charges a Realty Transfer Tax of 2 percent on every sale in Bucks County, split between the state (1 percent) and the local municipality and school district (the other 1 percent, typically divided evenly between the two). Pennsylvania law doesn't require a specific split between buyer and seller, but the customary practice on most deals is to divide the 2 percent evenly, with each party paying about 1 percent. There's no additional tier for higher-priced sales. A $2.2 million home in New Hope owes the same 2 percent rate as a $500,000 home in the same town.
Run the same $2.2 million price through both towns and the coincidence is almost too clean. In New Hope, the total transfer tax bill is $44,000, and by custom it's split, so each side owes roughly $22,000. In Lambertville, the mansion tax alone on that same price is also $44,000, but it falls entirely on the seller, and it stacks on top of New Jersey's separate base Realty Transfer Fee that applies to virtually every sale in the state regardless of price. The rate looks similar. Who owes it, and how much else gets added on top, is not.
| New Hope, PA | Lambertville, NJ | |
|---|---|---|
| Transfer/mansion tax on a $2.2M sale | 2% flat ($44,000), customarily split between buyer and seller | 2% mansion tax ($44,000), owed entirely by the seller, plus the state's base Realty Transfer Fee stacked on top |
| Who is legally responsible | Both parties, by local custom | Seller, by statute (as of July 10, 2025) |
| Annual property tax reference point | Statewide PA average effective rate: 1.30% | Hunterdon County average: 1.91% effective, roughly $8,523/year |
| Extra cost if the seller is leaving the state | None | Withholding of 2% of sale price or 8.97% of gain, whichever is greater |
The Other Tax at the Closing Table: Leaving New Jersey
There's one more line item that matters specifically for someone selling in Lambertville and buying across the bridge in New Hope, because that's a common move for river-town households who want to stay close to the same restaurants and the same towpath but change which state collects their taxes. New Jersey requires sellers who are leaving the state to prepay an estimated tax at closing, calculated as 2 percent of the sale price or 8.97 percent of the gain, whichever is higher. It isn't an extra tax on top of what's owed. It's a withholding that gets reconciled when the seller files their final New Jersey return. But it's real cash that has to show up at settlement, and sellers who haven't budgeted for it are often surprised by how much smaller their check is than they expected.
Reading New Hope's Median Price Without Getting Fooled
One more thing worth flagging for anyone cross-shopping these two towns on portals. New Hope is a small market, and the month-to-month median price numbers that show up on aggregator sites can swing wildly for reasons that have nothing to do with the underlying market. In March 2026, only six homes sold in New Hope, and the reported median jumped well over 100 percent year over year, driven by which specific six houses happened to close, not by a genuine shift in what buyers are paying. Lambertville sees a similarly thin trickle of monthly sales. A single high-end closing or a single starter-home sale can move the reported median by six figures in either direction. Treat any single month's median for either town as a data point, not a verdict, and look at a rolling three-month or longer window before drawing conclusions.
What This Means If You're Standing on the Bridge
None of this makes one town a better buy than the other. New Hope and Lambertville share a river, a bridge, and a lifestyle that draws buyers to both sides for the same reasons. What it means is that the decision shouldn't be made on list price alone. A buyer comparing a $2.2 million home on each side of that bridge is really comparing a lower, flatter transfer cost split two ways against a steeper, seller-only mansion tax stacked on a separate base fee, plus a materially higher annual property tax bill for as long as they own the New Jersey side. A seller in Lambertville pricing a home near or above $1 million needs to run net proceeds with the new tiered schedule in mind before setting an asking price, not after an offer comes in.
Because Nick Esser works both sides of this river as part of Bucks County and river-town representation, buyers and sellers get the full picture before they fall for a matching set of granite countertops on the wrong side of a tax line. If you're weighing a move between New Hope, Lambertville, or anywhere else along this stretch of the Delaware, Nick Esser can walk through what a specific property actually costs to own or sell, not just what it's listed for. Request a free home valuation to start with real numbers instead of portal medians.
A Few Direct Questions
Does New Jersey's mansion tax only apply to large estates? No. It applies to any qualifying single-family home, condominium, or cooperative unit selling at or above $1 million, along with certain farm properties with a residence, regardless of size or architectural style.
Who actually pays Pennsylvania's transfer tax on a New Hope sale? State and local law don't dictate a specific split. In most Bucks County sale agreements, buyer and seller divide the 2 percent total evenly, though the exact division is negotiable in the contract.
If I sell in Lambertville and buy in New Hope, does the New Jersey exit withholding apply to me? It can, since the requirement is based on whether the seller is leaving New Jersey residency, not simply moving a short distance. A New Jersey real estate attorney can confirm the exact withholding amount based on the sale price and gain before closing.
