Every dollar the High Line cost is measured. Every dollar it returned is a projection.

That asymmetry is worth holding onto, because the mechanism underneath it is genuinely clever and worth learning. In 2005 New York created a tradeable asset out of a zoning restriction — no eminent domain, no cheque written to anybody — and it worked.

What it did not do is settle who ends up holding the value it created. The park’s own co-founder has been blunter about that than most of its critics.

The city made a market out of a restriction

Here is the problem the 2005 rezoning had to solve. If you preserve a viaduct running above and beside private lots, you have taken something from the owners of those lots: they can no longer build what the zoning would otherwise let them build. The usual answers are to buy them out or to condemn the property, and both cost money the city did not intend to spend.

The West Chelsea Special District did neither. It created a High Line Transfer Corridor, and gave the owners inside it the right to sell their unused development capacity to receiving sites elsewhere in the district — any zoning lot outside three named subareas.² The stated purpose, in the zoning text itself, is“to permit light and air to penetrate to the High Line”.³ About a million square feet became transferable, enough to lift a receiving site from roughly seven and a half times its lot area to twelve.⁴

Two design choices made it work. The transfer is essentially as-of-right: it needs a notification to the planning department, a recorded easement and a restrictive declaration — not a public hearing and a special permit for every deal.² And the compensation is the right itself. The Planning Commission’s own report required owners to certify they had received no condemnation award, and provided that the easements would be modified “without condemnation award or similar compensation”.¹ The city did not pay for the easements it needed. It manufactured something the owners could sell instead.

Community Board 4 opposed exactly this, recommending in a twenty-two page disapproval that the corridor be eliminated. The Commission rejected it, calling the ability of those owners to sell their rights “of paramount importance in ensuring the preservation of the High Line and success of the resulting open space”.^1,4

It did work, on its own terms. A single 2016 deal moved 4,900 square feet three blocks north for $3.92 million — about $800 a foot.¹⁵ By late 2017 roughly ninety per cent of the corridor’s private rights had traded, enough for the city to set its own fallback rate at $625 a foot, computed as a weighted average of nineteen arm’s-length transactions.¹⁶ The Furman Center, comparing it with New York’s landmarks transfer programme — which it describes as largely illusory — calls the West Chelsea market “fairly robust”.¹⁴

What a zoning line is worth

The city wrote a restriction and then sold the right to escape it.

The High Line looking north, with the towers the rezoning made possible pressing in on both sides.Photo: Jakub Hałun, CC BY 4.0, via Wikimedia Commons

One side of the ledger is accounting

The number that grew each time it was told

The record has a stain, and the founder named it

In February 2017 Robert Hammond, who had co-founded Friends of the High Line to save the structure and was by then its executive director, said this about the thing he built:“We were from the community. We wanted to do it for the neighborhood. Ultimately, we failed.”¹¹

He was specific about why. The park’s visitors were overwhelmingly tourists. Listening sessions with public-housing residents did not begin until 2011, two years after opening, and found people who avoided the park because they did not feel it had been built for them. His own summary of the design process: “Instead of asking what the design should look like, I wish we’d asked, ‘What can we do for you?’”¹¹

A peer-reviewed study in Urban Geography the year before had measured it rather than felt it, finding the crowd “overwhelmingly White, to a degree that is far out of line with the racial/ethnic demographics of the borough and city”, that the homogeneity significantly exceeded comparable parks, and that it could not be explained by who lived nearby. Its conclusion: the High Line “is failing as a democratic public space”.¹²

The displacement is real but more particular than the usual telling. Average household income in Chelsea reached about $140,000, roughly five times that of the neighbouring public-housing households, and median asking rent hit $3,490 — fourth highest in the city.¹³ Residents of the adjacent NYCHA developments were not evicted, because federal rules cap their rent at thirty per cent of income. What went were market-rate renters, small businesses, and the gallery district: a councilman’s studio went from $900 a month in 2003 to $2,700 for the same 319 square feet.¹³

And there is a structural point in who pays to run it. Friends of the High Line raises more than ninety per cent of the park’s annual operating budget from private sources.⁶ A park whose quality depends on the wealth of its neighbours is a different kind of public good from one funded out of general taxation — and the gap between it and the city’s under-resourced parks widens with the property values it helped create.

Three things the story usually gets wrong

There was no 1999 demolition order. The city executed an agreement for voluntary abandonment on 20 December 2001, days before Giuliani left office, and Hammond was quoted reacting to it as fresh news in January 2002.⁸ The misdating appears to come from Friends of the High Line’s own history page, which files the event under a 1999 heading while simultaneously calling it one of the mayor’s last acts in office — two claims that cannot both be true of a term that ended in 2001. 1999 is the right year for the organisation’s founding, not for the order.

“Eight million visitors a year” was not an annual figure when the city first used it. The July 2012 press release says more than eight million people had visitedsince the park opened in June 2009 — a three-year cumulative total.⁶ The annual number reached roughly that level around 2016. And there are no turnstiles: the count comes from staff tallying eight zones at hourly intervals and feeding the result into an extrapolation.⁹

And $153 million buys two sections, not a park. Across all phases the capital cost is nearer $200 million, and no single document reconciles every phase.⁹

What transfers

The mechanism is the part worth taking away, and it is genuinely elegant. A city that wants something preserved can compensate the owners it burdens without buying them out: define the restriction, define a corridor, and make the foregone capacity saleable to somebody else who wants it. No condemnation, no appropriation, and — because the transfer is as-of-right — no two-year approval fight per deal. It priced at around $800 a foot in the open market and the city eventually set its own rate at $625.

The caution is that this is value capture with the capture left out. The city created the uplift and then handed the right to monetise it to the private owners along the corridor, which was the point — that was the compensation. But it means the public purse funded a park, granted a rezoning, and kept almost none of the increment directly. What it kept was a forecast that the increment would return as tax.

So the question to ask of any project sold this way is the one this study is built on: which of these numbers is measured, and which is projected? A cost is measured. Occupancy is measured. Rent rolls are measured. “Generated $2 billion in private investment” and “will return $1.4 billion in taxes” are neither — the first is a tally that includes what had not been built yet, and the second is a discounted forecast by a party retained to produce it. Both may be right. Neither has been checked.

The reel that prompted this ends on the correct line: who captures the value matters as much as how much you create. The record adds one more. Nobody has ever independently established how much was created — and the founder of the thing that created it says the people it was meant for did not get it.