Sellers of farmland-assessed acreage in Raritan Township tend to assume the same thing: sign the contract, transfer the deed, and a rollback tax bill lands somewhere in the closing paperwork. It doesn't work that way. The rollback tax under New Jersey's Farmland Assessment Act attaches to a change in how the land is used, not to who owns it. A sale, by itself, changes nothing on the tax roll. That distinction has already been tested in New Jersey Tax Court, in a case that started right here in Raritan Township, and it matters more this year than it has in a while because the state is actively rewriting the rules around it.
The Trigger Everyone Gets Wrong
New Jersey's Farmland Assessment Act of 1964 lets land devoted to agricultural or horticultural use get taxed on its farming productivity rather than its market value, provided the parcel is at least five contiguous acres, has been in qualifying use for two consecutive years, and clears a minimum gross sales threshold (currently $1,000 a year on the first five acres, plus $5 per additional acre for cropland or livestock, and $500 plus 50 cents per additional acre for woodland under a management plan). The owner files Form FA-1 with the municipal assessor every year by August 1.
Change the use of that land, and the township can retroactively bill the difference between what was paid under farmland assessment and what would have been paid at full market value, for the year the use changed and the two tax years before it. That bill becomes a lien on the land once the County Board of Taxation renders judgment.
Here's the part sellers routinely miss: the New Jersey Division of Taxation's own guidance states plainly that rollback taxes are not generated when a new owner continues to actively use the property as farmland. Ownership transfer and use change are two separate events, and only one of them triggers the tax.
The Case That Settled It, Filed Right Here
That distinction wasn't just theoretical. In Flemington Trade Center v. Township of Raritan, the Tax Court ruled that a municipality cannot impose rollback taxes on farmland-assessed property just because it has concerns about the land's eligibility. The township has to show an actual change in use before the bill goes out. Concerns, suspicion, or a change in ownership aren't enough on their own.
For anyone buying or selling farmland-assessed acreage in this township, that's not an abstract legal footnote. It's the reason a careful purchase agreement should spell out who's responsible if a change of use happens after closing, and why a buyer who intends to keep farming the land, even at a modest scale, is not automatically inheriting a tax bomb the seller triggered.
The Township's Own Numbers Tell You Why This Keeps Coming Up
Raritan Township's Comprehensive Farmland Preservation Plan put the township's farmland-assessed acreage at roughly 6,450 acres out of about 24,054 total, or 26.8 percent of the township, based on 2017 tax records. At the same time, the same plan noted that land actually in agricultural use had declined 46 percent since 1987, according to state land use and land cover data.
Read those two numbers together and the picture sharpens. A quarter of the township carries a farmland assessment, but the share of land genuinely being farmed has been shrinking for decades. That gap is where rollback exposure quietly accumulates. Land that qualified for farmland assessment years ago, and has kept the paperwork current enough to hold the status, isn't necessarily land anyone still expects to farm. It's exactly the kind of parcel where a future sale to a buyer who wants to build, subdivide, or simply stop farming can surface a tax bill nobody budgeted for.
The township's Open Space Advisory Committee separately reports 2,436 acres of public parkland and open space, about 9.9 percent of the township's 38.6 square miles, plus another 1,360 acres of privately owned preserved farmland, an additional 5.5 percent. Preserved farmland under a permanent deed restriction is a different animal from farmland-assessed land. Preservation forecloses development entirely through an easement. Assessment is just a tax classification that can be walked back the moment the use changes. Confusing the two, which happens often in casual conversation about "protected" land, is worth clearing up before anyone writes an offer.
What Changed in Trenton, and What's Still Just Proposed
The math around rollback taxes isn't frozen. Governor Murphy signed the Farmland and Woodland Tax Assessment Integrity and Investment Act (S3446/A6278) into law on January 14, 2026, tightening the program in ways that don't touch the rollback calculation directly but do raise the cost of getting the paperwork wrong.
| Signed into law (Jan. 2026) | Still pending (introduced Feb. 2026) | |
|---|---|---|
| Bill | S3446 / A6278 | A4378 |
| Penalties for misrepresentation | Increased | Not addressed |
| Online application portal | Established, targeted for Tax Year 2027 filings | Separately proposed for the same purpose |
| Rollback tax lookback window | Unchanged, still current year plus two prior years | Would extend to current year plus three prior years |
| On-site inspection frequency (under 10 acres) | Unchanged | Would move from every three years to every other year |
| Fraud reporting hotline | Not included | Would require one within six months of enactment |
The signed law is about enforcement and transparency. It doesn't change how much a rollback bill costs if one is triggered. A4378, still working through the process as of this writing, is the one that would actually make a triggered rollback more expensive by adding a third year to the calculation and would put farmland assessment status under closer, more frequent scrutiny for smaller parcels.
Nobody can promise which version of the rule will be in effect by the time a given deal closes. What a seller or buyer can do is stop assuming the two-year window is permanent and build in enough time and disclosure to account for a possible third year before signing anything that touches a use change.
What This Means If You're Actually Transacting on This Land
If you're selling farmland-assessed acreage in Raritan Township, the safest assumption is that the buyer's plans for the land, not the sale itself, determine whether rollback taxes ever get triggered. If the buyer intends to keep farming, put that in writing and keep the assessor informed. If the buyer plans to build, subdivide, or otherwise change the use, that conversation about who absorbs the rollback liability needs to happen before closing, not after the township sends a bill.
If you're buying, ask the seller's attorney or the township assessor directly whether the parcel is currently farmland assessed, how long it has held that status, and whether any change in use is planned or already underway. A parcel that's been farmland assessed for a decade or more carries more retroactive exposure if the use changes than one assessed for just the required two years.
If you're an executor or family member settling an estate that includes farmland-assessed land, check the assessor's file early. Farmland assessment status doesn't automatically transfer or automatically lapse just because ownership changed hands through probate. Confirming the parcel's status before listing avoids a surprise showing up mid-contract.
A Few Straight Answers
Does selling farmland-assessed land by itself trigger the rollback tax? No. The tax is triggered by a change in use, not by a change in ownership. A buyer who continues farming the land inherits the assessment status, not a tax bill.
Who is legally on the hook for the rollback tax if it is triggered? It becomes a lien on the land itself once the County Board of Taxation renders judgment, which is why purchase agreements on farmland-assessed parcels should address responsibility explicitly rather than leaving it to assumption.
Does the proposed three-year lookback in A4378 apply to deals closing now? As of this writing, A4378 is still pending and the rollback calculation remains at the current year plus two prior years. That could change before a deal you're negotiating today actually closes, which is exactly why the timeline is worth tracking rather than treating as settled.
Farmland-assessed land in Raritan Township carries real tax advantages and real fine print, and the two rarely get explained together. If you're weighing a purchase, a sale, or an estate that includes acreage like this, Connie Manailovich has spent 18 years working through exactly this kind of transaction in Hunterdon County, matching township-level detail with the patience these deals require. Work with Connie — Request a Consultation.
