Six months ago, $327.50 per square foot was the most anyone had ever paid for Manhattan office space. That record just fell, and it fell to a building that won’t be finished until 2029.
Hedge fund Castle Hook Partners has signed for the 53,000-square-foot penthouse at Related Companies’ 625 Madison Avenue. The Financial Times reported the deal, and TRD covered it. The exact rent wasn’t disclosed, but it falls between $350 and $400 per square foot. That’s up to $21.2 million a year for a single tenant on a single block of floors.
If you own, lease, lend on or broker Manhattan office space, this deal is worth more than a headline. It tells you where the ceiling now sits for trophy office, who is paying it, and what kind of building gets to charge it. I’ll walk through the numbers, the tenant roster Related has stacked up in about a month, and what I’d take from it as an operator.
The Deal in One Paragraph
Castle Hook, run by David Rogers, manages $11 billion in assets and employs 35 people. It will leave the General Motors Building on Fifth Avenue and plans to move into 625 Madison in the second half of 2029, after the building is completed. TRD’s reporter opened the story with a line that sums up Related’s momentum:
“How does Related Companies follow up securing an anchor tenant for its prominent office development? By breaking the local rent record weeks later.” — Holden Walter-Warner, The Real Deal
How the Record Moved
Here is the progression of the Manhattan office rent record as TRD laid it out:
| Building | Tenant | Rent (psf) | Space |
|---|---|---|---|
| Previous record | Not named | $320.00 | Not given |
| 9 West 57th Street (Soloviev, spring 2026) | Private international family office, 10-year deal | $327.50 | 5,063 SF, 50th floor |
| 625 Madison Avenue (Related, Oct. 2026) | Castle Hook Partners | $350–$400 | 53,000 SF penthouse |
A few things jump out when I run the math myself:
- At the low end, $350 is about 6.9% above the Soloviev record. At the high end, $400 is about 22.1% above it.
- $400 × 53,000 SF = $21.2 million, which matches the reported annual rent ceiling. So the $21.2 million figure implies the top of the range.
- At $350, the same space would run about $18.6 million a year.
- The Soloviev record was set on 5,063 square feet. Castle Hook’s deal covers more than 10 times that area. A record on a small floor is a data point. A record on a full penthouse is a market.
The Tenant Stack Related Has Built
The record didn’t come out of nowhere. In roughly a month, 625 Madison has signed three major financial tenants:
- General Atlantic — a 150,000-square-foot anchor lease, signed about a month before the Castle Hook deal.
- Veritas Capital — 93,000 square feet.
- Castle Hook Partners — the 53,000-square-foot penthouse.
By my count, that’s about 296,000 square feet across those three leases alone, all to investment firms and all years before delivery. TRD also reported that in July, Related was in discussions to bring Ralph Lauren’s Polo Bar to the building from 1 East 55th Street. Lease details weren’t revealed.
My read: this is how a trophy pre-leasing campaign is supposed to work. You land a big, credible anchor. You use it to sign a mid-size name. Then you sell the crown at a price nobody has paid before.
The Building Behind the Number
The site has a long history, and it explains why Related can push rent this hard.
- December 2023: Related bought the site from SL Green for more than $600 million.
- Before that: SL Green spent roughly a decade fighting to take the property back from billionaire investor Ben Ashkenazy, which TRD has called “a decade-long saga.”
- The pivot: Related originally planned a mixed-use project with residential, retail and hospitality. It switched to an all-office building to capture demand for premium Manhattan workspace.
- The capital: Saudi Arabia’s Public Investment Fund, a $1 trillion sovereign wealth fund, took a two-thirds stake in the planned 1,200-foot skyscraper last year. It had already put about $200 million into the project when that stake was disclosed.
That last point matters. A sponsor with that much equity behind it can afford to hold out for record rents rather than fill floors quickly at a discount.
What I’d Take From This as an Operator
This is opinion, not reporting. But here’s how I read the deal.
1. The trophy market and the rest of the market are now two markets. A hedge fund with 35 employees is taking 53,000 square feet. That works out to roughly 1,500 square feet per person by my math. That isn’t a headcount decision. It’s a brand and talent decision. Commodity Class B owners shouldn’t read this record as a sign their rents are coming up too.
2. New construction is winning the flight to quality. Castle Hook is leaving the GM Building, one of the most prestigious addresses in Manhattan, for a tower that isn’t built yet. If even top-tier existing buildings are losing tenants to new product, owners of older Class A space need a capital plan, not a wait-and-see plan.
3. Pre-leasing is the new underwriting. Three leases in about a month, years before a 2029 completion, change the risk profile of the whole project. If I were lending against a ground-up office tower right now, signed leases at this stage would be the first thing I’d want to see.
4. $400 is now a real number. In June, Soloviev started marketing an 11,155-square-foot space on the 50th floor of 9 West 57th Street at $400 per square foot. At the time, that looked like an aspiration. With Castle Hook possibly at the same level, it looks like a benchmark.
What We Don’t Know Yet
A few cautions before anyone rewrites a pro forma:
- The exact rent wasn’t disclosed. The $350 to $400 range comes from the FT’s reporting.
- TRD didn’t report concessions, such as free rent or tenant improvement allowances, so the net effective rent is unknown.
- The building isn’t complete until 2029, so the market could look very different by the time Castle Hook moves in.
Headline rent sets the record. Net effective rent sets the value. I’d want both before calling this a new normal.
The Bottom Line
Manhattan’s office record moved from $320 to $327.50 to as much as $400 per square foot in a matter of months, and the newest record came from a tower still under construction. Related has used a sovereign-backed balance sheet, an anchor tenant and a prime Madison Avenue site to sign three financial firms and set a new high-water mark.
If you hold trophy space, this is your new comp. If you hold anything less, it’s a reminder that the gap between the top of the market and everything else keeps getting wider.
What would it take for your building to compete for a tenant like Castle Hook? Drop your thoughts in the comments, and follow me for daily breakdowns of the NYC deals that matter most.
