New York Updates Real Property Tax Law for Renewable Energy Systems

Dec 25, 2025, 2:57 AM
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New York State has recently amended Real Property Tax Law (RPTL) § 575-b to enhance clarity and predictability in the taxation of solar and wind energy systems. Originally enacted in 2021, this law aimed to establish a standardized appraisal methodology for these renewable energy systems, utilizing a discounted cash flow (DCF) approach to determine their value for property tax purposes.
The DCF model, developed by the New York State Department of Taxation and Finance (DTF), was intended to provide a consistent framework for assessing the value of solar and wind projects. However, the implementation of RPTL § 575-b faced significant challenges, including legal disputes that questioned its constitutionality. A notable case, Airey, et al. State of New York, resulted in the court striking down the DTF model, citing the exclusion of renewable energy certificates and investment tax credits from revenue calculations as arbitrary and capricious.
In response to these legal challenges, the New York State Legislature passed Senate Bill 2025-S8012, which amends RPTL § 575-b to clarify the assessment model and address the issues raised in the Airey decision. The amendments include provisions that allow for the inclusion of expenses related to community benefits and decommissioning costs, while also designating federal investment and production tax credits as intangible assets not counted as revenue streams.
These changes are part of a broader effort to incentivize clean energy development in New York. The sponsor's memorandum for the bill emphasizes the commitment to creating a stable and predictable taxation environment for renewable energy projects, which is crucial for attracting investment in this sector.
The amendments also clarify that no costs will be imposed against any assessing unit's established valuations based on the DTF model, which had previously been a point of contention. This clarification aims to ensure that local assessors can confidently utilize the DTF model for valuing solar and wind facilities without fear of legal repercussions or financial penalties.
The DTF model, which employs a DCF approach, estimates the present value of renewable energy systems based on their projected net income and associated risks. This method is designed to reflect the evolving nature of the renewable energy industry, allowing for annual updates to the appraisal model in consultation with relevant stakeholders, including the New York State Research and Development Authority (NYSERDA) and the New York State Assessors Association (NYSAA).
As New York continues to push for a greener energy future, the revisions to RPTL § 575-b are expected to support the state's renewable energy goals, including those outlined in the Climate Leadership and Community Protection Act (CLCPA). By providing a more predictable taxation framework, the state aims to encourage the development of solar and wind energy projects, which are essential for meeting its renewable energy benchmarks and combating climate change.
In conclusion, the recent amendments to RPTL § 575-b represent a significant step forward in the taxation of renewable energy systems in New York. By addressing previous legal challenges and clarifying the assessment model, the state is reinforcing its commitment to clean energy and providing a stable environment for investment in renewable projects.

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