Form RP-305-L: Agricultural Assessment Notice of Conversion and Payment Due Explained

Form RP-305-L, officially titled “Agricultural Assessment Notice of Conversion and Payment Due,” is a notice issued by local assessors in New York State when land that previously received an agricultural assessment has been converted to a non-agricultural use. This form isn’t something a landowner fills out and submits proactively — it’s a notice that arrives from the assessor’s office informing the property owner that a conversion has occurred and that a payment is now owed.

If you’ve been benefiting from a reduced property tax assessment under New York’s agricultural assessment program and you stop using the land for qualifying agricultural production, the local assessor is required to identify that change and calculate what’s called a “payment due.” This isn’t a penalty in the punitive sense — it’s a recapture mechanism designed to recoup a portion of the tax savings you received while the land was assessed at agricultural value instead of full market value.

Who Receives This Notice

Form RP-305-L is sent to landowners who previously filed for and received an agricultural assessment, typically through Form RP-305, and who have since converted that land to a use that no longer qualifies. Conversion can mean many things: selling the parcel for residential development, building on it, letting it sit idle beyond allowed limits, or otherwise removing it from active agricultural production as defined under Agriculture and Markets Law.

Assessors monitor agricultural assessment properties as part of their regular duties, and when a change in use is discovered — whether through a site visit, a building permit application, or a report from the landowner — the assessor calculates the payment due and issues RP-305-L to formalize the notice.

When This Form Comes Into Play

The notice typically follows one of a few scenarios: a landowner sells a portion of agricultural land for non-farm use, a change in property use is discovered during a routine assessment review, or the landowner voluntarily reports that the land no longer meets agricultural production requirements. In some cases, landowners who previously submitted modifications through Form RP-305-D to adjust their agricultural assessment application may later trigger a conversion notice if the modified parcel eventually shifts out of qualifying use altogether.

The payment due calculation generally reflects the tax savings realized over a specific look-back period, prorated based on how much of the converted acreage was affected. The exact formula and number of years covered depend on the type of conversion and the applicable provisions under New York’s Real Property Tax Law Section 305.

What to Do When You Receive RP-305-L

Since this is a notice generated by the assessor rather than a form the landowner initiates, the primary action required is to review the calculation carefully and respond within the timeframe stated on the notice. Landowners who believe the conversion determination is incorrect, or who dispute the acreage or payment amount, should contact their local assessor’s office promptly to discuss the basis for the calculation.

Keeping accurate records of land use, lease agreements, and any documentation showing continued agricultural activity can help resolve disputes quickly. If part of the payment due stems from an administrative filing error rather than an actual change in use, it may be worth checking whether a correction through related agricultural assessment paperwork is appropriate before the payment is finalized.

Because the underlying agricultural assessment program is administered locally but governed by state law, procedures for appealing a payment due notice can vary somewhat by municipality. Landowners with larger or more complex parcels — especially those with multiple structures or shared administrative arrangements, similar to what’s addressed in Form RP-1573-ACR-A — may want to consult with their assessor’s office or a tax professional to make sure the conversion calculation accounts for all relevant factors.

The official fillable version of Form RP-305-L is available directly from the New York State Department of Taxation and Finance, and assessors use this standardized template to ensure the notice includes all legally required details: the parcel information, the date and nature of the conversion, the calculation methodology, and the amount and due date of the payment owed.