-- For New York City property owners, unused development rights can represent significant value. Figuring out how much those rights are worth and whether they can actually be sold is another matter.
BrokerOpinionOfValue.com has published a new guide, “NYC Air Rights Valuation: What Unused Development Rights Are Worth and How They Are Sold,” aimed at bringing the calculation methods, transfer rules, regulatory limits and official City resources used to evaluate air rights into one reference.
The guide is available free at BrokerOpinionOfValue.com.
The guide comes as the City's zoning landscape continues to adjust following City of Yes for Housing Opportunity, adopted in December 2024, which expanded opportunities for certain landmark development rights transfers.
Air rights generally refer to development capacity permitted under zoning but not used by the existing building. A 10,000-square-foot zoning lot with a permitted floor area ratio, or FAR, of 6.0, for example, could potentially support 60,000 square feet of zoning floor area. If only 20,000 square feet has been built, the basic calculation leaves 40,000 square feet of unused development rights.
But that does not mean the owner has 40,000 square feet that can simply be sold.
That distinction between unused development rights and transferable development rights is a central focus of the guide. The amount that can move to another property depends on the zoning and transfer mechanism involved, which may include a zoning lot merger, a landmark transfer, a special permit or provisions within a special district.
The economics of the receiving site can be just as important.
A developer buying air rights is effectively purchasing the ability to add buildable square footage to a project. What the developer can afford to pay depends on the value created by that additional space after accounting for construction costs, financing, carrying costs and required returns. That is why development rights are commonly analyzed on a price-per-buildable-square-foot basis.
The guide also examines changes made under City of Yes. For qualifying landmark properties, the reforms expanded potential transfer areas to include eligible sites on the landmark's tax block, across the street from the block and at the next intersection. Certain transactions may also proceed through a City Planning Commission Chair certification process.
The changes could expand the buyer pool for some underbuilt landmarks, but they do not create an unrestricted market. Air rights cannot simply be transferred from one property to an unrelated development site anywhere in New York City.
“Owners researching air rights generally end up with pieces of the answer from four different places,” said Edward Winslow, co-founder of BrokerOpinionOfValue.com. “The guide puts the calculation, transfer mechanisms, caps and post-City of Yes rules in one place, with links to the official City tools so owners can verify the information against the public record rather than take it on faith.”
The guide links directly to resources including the Department of City Planning's ZoLa zoning map, the New York City Zoning Resolution, Landmarks Preservation Commission records and City of Yes materials.
BrokerOpinionOfValue.com also addresses how air rights can factor into a broker opinion of value, particularly in estate and probate matters, partnership disputes, tax appeals, litigation and other situations where the value of the existing building may not tell the entire story.
About the company: BrokerOpinionOfValue.com is an educational platform and national directory connecting commercial property owners, attorneys, CPAs, executors and fiduciaries with commercial real estate brokers who prepare broker opinions of value. The platform publishes valuation guides covering property sales, estates, tax appeals, litigation, partnership disputes, eminent domain and other valuation needs.
Contact Info:
Name: Edward Winslow
Email: Send Email
Organization: Broker Opinion of Value
Address: 135 West 36th Street NY NY 10018
Phone: 203-912-7244
Website: https://brokeropinionofvalue.com/
Release ID: 89200502
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