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Samantha Mallon

Taxes & Money

Selling Land Enrolled in Clean and Green: Act 319 Rollback, Explained

Pennsylvania’s Clean and Green program cuts the tax bill on more than 12 million enrolled acres, and claws it back badly when land sells wrong: seven years of rolled-back taxes plus 6% interest, sometimes on the entire tract. This guide covers the rollback formula, the separation and split-off rules that let land divide without detonating, who pays when enrolled land sells, and why marketing to a continuation buyer often nets more than the higher development price.

By Samantha Mallon, SRES®, licensed in PA & NJ · Reviewed August 6, 2026 · 10 min read

Across Chester, Bucks, and Montgomery counties’ horse country and woodland, tens of thousands of acres carry tax bills a fraction of what the land is worth, courtesy of Clean and Green, Pennsylvania’s Act 319 preferential assessment. The program is a gift while you hold the land and a trap when you sell it wrong: seven years of rolled-back taxes plus 6% interest, sometimes on the entire tract, triggered by mistakes as simple as an oversized split-off. This guide covers the sale of enrolled land from the owner’s side, built on the statute, the regulations, and the Department of Agriculture’s own guidance.

What Clean and Green is, and why the tax bill looks like that

Act 319 lets qualifying land (agricultural use, agricultural reserve, or forest reserve, generally ten acres or more, or smaller parcels producing $2,000+ in annual farm income) be assessed at use value instead of market value. More than 12 million acres are enrolled statewide, per the Pennsylvania Department of Agriculture. Enrollment is a covenant that runs with the land: the tax savings are real and annual, and the county keeps both values on file, the market value your buyer sees and the use value your tax bill reflects. The gap between them is the coiled spring.

Rollback taxes: the seven-year, 6% math

  • The formula: for the current year and six prior (or the enrollment period if shorter), the difference between preferential and normal taxes, each year’s difference carrying 6% simple interest to the present, per 7 Pa. Code 137b.89.
  • The trigger is use change or removal, not sale: a buyer continuing eligible use inherits the enrollment with no rollback anywhere; the liability belongs to whoever owns the land when the use changes.
  • The magnitude: $8,000 a year in savings becomes roughly $56,000 of rollback plus interest approaching $70,000 total; order the county’s estimate before pricing anything.
  • Condemnation is the exception: eminent domain takings do not trigger rollback on the taken land.

Separations and split-offs: selling pieces correctly

The two lawful divisions of enrolled land (source: Act 319; 7 Pa. Code 137b.82; PA Department of Agriculture)
MechanismWhat it isRollback consequenceThe rules that bite
SeparationDivision into tracts (generally 10+ acres each) that all continue in eligible useNone, if every tract stays eligibleA use change within 7 years of the separation can subject the entire original tract to rollback
Split-offConveying up to 2 acres/year for a residence occupied by the grantee (3 acres where zoning requires)Rollback due, but only on the split-off acresCumulative cap: lesser of 10 acres or 10% of the enrolled tract; speculative building lots do not qualify; 30 days’ advance notice to the assessor

Exceed the split-off limits or convey for an ineligible purpose and the rollback can reach the entire enrolled tract, not just the piece conveyed. The regulation itself tells landowners to engage the county assessor before a planned split-off; treat that as mandatory.

Who pays: structuring the sale of enrolled land

  1. 01Market to the continuation buyer first: farm, equestrian, and conservation buyers pay full price with zero rollback anywhere; that segment often nets more than a development sale carrying a six-figure rollback credit.
  2. 02Put Act 319 in the agreement of sale explicitly: who bears rollback on a use change, buyer’s acknowledgment of the covenant, and the county notification mechanics. Silence is the malpractice pattern.
  3. 03Development sales price the spring: builder offers arrive net of rollback; compare them against continuation offers on an after-everything basis, not headline price.
  4. 04The gain math rides along: land sales beyond the residence and its curtilage sit outside the Section 121 exclusion; the PA and NJ tax guide and your accountant belong in the plan early.

The seller's Act 319 playbook

  1. 01Confirm enrollment and history at the county assessment office: original application, acreage, prior split-offs (they count against the cap).
  2. 02Order the rollback estimate from the assessor before listing; it is the number every negotiation orbits.
  3. 03Decide the buyer strategy: continuation versus development, priced after-everything, with the valuation covering the residence and the land story told accurately in the listing.
  4. 04Counsel with 319 experience drafts the agreement; the well and septic guide usually applies to the same properties, and the fee index carries the township paperwork.

Samantha, SRES®, sells the collar counties’ larger properties, where Act 319 enrollment is the rule, not the exception. If you are downsizing off enrolled land, start with the free valuation and ask her to walk the rollback math with your county’s numbers before anything lists. The program rewarded you for decades of stewardship; the sale should not claw it back through carelessness.

Questions landowners ask about Clean and Green sales

What is Clean and Green, and how do I know if my land is enrolled?

Clean and Green (Act 319, the Farmland and Forest Land Assessment Act of 1974) is Pennsylvania’s preferential assessment program: enrolled land is taxed on its agricultural use value instead of fair market value, which is why a 30-acre Chester County property can carry a tax bill that looks impossibly low. More than 12 million acres are enrolled statewide, heavily in the collar counties’ horse country and woodland. To confirm enrollment, check the county assessment office’s records for your parcel (many list it on the assessment card as Act 319 or show separate market and use values). Owners who bought decades ago sometimes do not know they are enrolled, and discovering it during a sale, rather than before, is how six-figure surprises happen, because the enrollment and its covenant run with the land.

What exactly triggers rollback taxes, and how much are they?

A change to an ineligible use triggers rollback: the difference between the taxes actually paid under preferential assessment and what would have been paid at fair market value, for the current year plus the six previous years (seven total, or the length of enrollment if shorter), plus 6% simple interest per year on each year’s difference, per the Act and 7 Pa. Code 137b.89. Selling the land does not itself trigger rollback if the buyer continues an eligible use; the liability lands on whoever owns the land when the use changes. The magnitude surprises people: on a property saving $8,000 a year in taxes, seven years plus interest approaches $70,000. Buyers who intend to build or develop will price the rollback into their offer or demand the seller credit it, which is why the number belongs in your listing math from day one.

Can I sell off a piece of the land without blowing up the whole enrollment?

Two mechanisms, with very different consequences. A separation divides enrolled land into tracts of generally ten acres or more that each continue in eligible use: no rollback is due, and each tract keeps its preferential assessment. A split-off conveys a small piece (no more than 2 acres per year, cumulatively capped at the lesser of 10 acres or 10% of the enrolled tract, with a 3-acre allowance where zoning requires it) for a residence to be occupied by the person receiving the land: rollback is due, but only on the split-off acres, not the whole tract, per 7 Pa. Code 137b.82. Get either one wrong (an oversized split-off, a speculative building lot, a use change inside seven years of a separation) and the rollback liability can reach the entire enrolled tract. County assessors require 30 days’ advance notice of conveyances, and the planning conversation belongs before the survey, not after the agreement of sale.

Who pays the rollback when enrolled land sells: buyer or seller?

The statute’s answer: whoever owns the land at the time of the change in use or removal from the program. The market’s answer: it is negotiated, and the agreement of sale should say so explicitly. If the buyer continues farming or forest use, no rollback is due and the enrollment simply continues (the buyer should countersign the county’s forms acknowledging the covenant). If the buyer intends to build, the rollback becomes a real cost someone must absorb: buyers typically discount their offer by the rollback amount, or the parties agree to a credit at closing, or the seller triggers removal pre-sale and pays it directly for a clean title. What must not happen is silence: an agreement of sale that ignores Act 319 on enrolled land is a lawsuit template. Use counsel who has handled 319 conveyances; in the collar counties, the good ones have handled dozens.

I am downsizing off a 20-acre property. How does Clean and Green change my plan?

Three ways. Pricing: your land’s value to a developer or estate buyer reflects fair market value, but the rollback liability transfers with a use change, so your realistic net depends on who buys: a horse-farm buyer continuing eligible use pays full price with no rollback anywhere, while a builder prices the rollback into the offer; sometimes marketing to the continuation buyer is worth more than the theoretically higher development price. Timing: rollback grows with each year of enrollment savings, but only seven years count, so waiting does not compound liability indefinitely; the 6% interest does, however, accrue. And documentation: order the county’s rollback estimate early (assessors will calculate it), assemble the enrollment application and any prior split-off history, and hand your agent the whole file, because the buyer’s title company will find it anyway. An accurate Act 319 story in the listing attracts the right buyers instead of losing the wrong ones at inspection.

About the author

Samantha Mallon, SRES®

Samantha is a real estate agent with Compass, licensed in Pennsylvania (RS365940) and New Jersey (2440598), holding the SRES® (Seniors Real Estate Specialist®) designation. Before real estate she earned a finance degree at Rutgers and a master’s in analytics at Georgia Tech, and worked in management consulting at Deloitte, a background she now applies to pricing, preparation, and honest guidance for sellers navigating downsizing, longtime homes, and family transitions across Greater Philadelphia and South Jersey.

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