Air Rights Monetization: How Cities Earn From Airspace

Which public assets could support a transaction?

A public agency considering a drone program needs an operating budget for staff, equipment, maintenance, and public engagement. Property revenue is one possible funding source, but it should not be assumed to cover those costs. Test the opportunity with an inventory, legal review, and market evidence before including it in a program budget.

A library, garage, transit yard, or civic site may have unused development capacity. Whether that capacity can be transferred depends on zoning, title, public-property disposal rules, and an eligible receiving site. A lease above operating infrastructure raises engineering questions as well. If you are new to the terms, start with What Are Air Rights?.

Model 1: Sell or transfer development rights

The simplest model is a sale. A public property with unused floor area transfers it to a private project through a zoning lot merger or a transfer of development rights (TDR) program, and the city or agency receives a payment.

Landmark transfers illustrate the mechanism. In Penn Central Transportation Co. v. New York City (1978), the Supreme Court considered transferable development rights in upholding the Grand Central landmark designation. New York's 2017 Greater East Midtown plan then linked qualifying development-rights transfers to contributions for public improvements. NYC DOT describes the fund and its role in streets and transit access; those district-specific requirements are not a nationwide fee formula.

The useful policy question is how a transfer can support preservation or public improvements while leaving a viable project for the buyer. Review the actual zoning mechanism and public benefit before recommending a similar structure in another jurisdiction.

Possible benefit: a payment for rights an agency chooses not to retain. Trade-offs: a transfer can limit future use, requires an eligible receiving site, and may not be attractive in the current market.

Model 2: Lease the space above public infrastructure

Some of the largest developments in the country sit in the air above public infrastructure. Instead of selling, the agency keeps the land and leases the right to build on a platform over its operations.

• Rail yards. The Hudson Yards development team announced a 99-year lease agreement with the MTA in May 2010 for the West Side Yards. It is a historical example of a large infrastructure transaction, not evidence of what a smaller municipal site would earn.
• Highways. Development above a highway corridor requires agreement with the infrastructure owner and a review of clearance, access, structural loads, maintenance, and construction impacts. A zoning allowance alone does not answer those questions.
• Public buildings and garages. Smaller cities can apply the same idea to a municipal garage or civic site, leasing the space above for housing or offices while keeping the public use below.

Possible benefit: recurring rent while retaining the underlying property. Trade-offs: engineering, approvals, financing, and lease obligations can be substantial; negotiate protections for the operations underneath.

Model 3: Charge for drone use of city property

Drones add a newer revenue line. As delivery, inspection, and public safety operations scale, operators need places to take off, land, dock, and charge. Many of the best sites are on public property: rooftops of city buildings, parks, garages, and transit facilities.

Subject to state and local authority, possible property-use arrangements include:

• Require permission to use a city-owned launch or landing site and assess whether a permit fee can recover documented program costs.
• Lease rooftop and ground sites for drone docks, vertiports, and charging, at market rates negotiated like any other property lease.
• Set conditions on the use of city property, such as hours, noise, insurance, and data sharing.

Keep the fee attached to a site or service the city actually provides, rather than to overflight. The FAA's authority over aircraft operations is separate from a city's property agreement. The FCC's 2018 small-cell order is a comparison to consider when explaining cost-based infrastructure fees, not a drone-fee rule or proof of a city's authority. Counsel must assess the proposed charge under the applicable law. Our municipal drone governance guide explains the property-use distinction.

Possible benefit: recurring payments for actual use of a public site, if demand and the agreement support them. Trade-offs: uncertain demand, ongoing operating costs, and legal review of the fee basis.

How should a city assess an opportunity?

1. Inventory. List city-owned parcels with their zoning, permitted floor area, and built floor area. The difference is your unused development rights. Add rooftops and sites suitable for drone docks.
2. Legal review. Confirm which transfer tools your zoning code offers, what state law requires for disposing of public property, and what your city attorney considers a defensible drone fee.
3. Valuation. Get an independent appraisal per buildable square foot for the best candidates, and a market rent estimate for drone sites.
4. Choose sell, lease, or hold. Lease where you own operating infrastructure that will stay. Sell where you hold landmark or surplus rights with no realistic public use. Hold where the market is thin.
5. Run a transparent process. Publish the inventory, the valuation method, and how proceeds will be used before any deal reaches council.
6. Ring-fence the proceeds. Dedicating revenue to public realm, transit, or the airspace program itself builds the public support the next deal will need.

What mistakes should a city avoid?

• Selling without a valuation. One-off negotiations with a neighbor who needs your rights tend to favor the buyer.
• Giving away future flexibility. A sale can block a future public building, vertiport, or expansion on the same site.
• Fees that look like airspace tolls. They invite preemption fights and erode trust with operators.
• Skipping the public story. Explain the public benefit and invite residents to examine the proposed terms.

Transparency matters more than revenue

Publish what an operator would pay for, how the price was derived, what public costs remain, and which department administers the agreement. A fee for a landing site should be described as a fee for that site. Private owners can participate through their own agreements; their participation does not give a city control of federal airspace.

If an air taxi or drone-site proposal is part of the inventory, assess zoning, access, engineering, and federal operating requirements separately. Development capacity alone does not make a site usable for aviation. See Air Rights and Flying Cars and Air Taxi Readiness for Cities for planning questions.