Carnegie Hill

Why Off-Market Is Having a Moment on the Upper East Side

Off-market sales are booming on the Upper East Side. Here's why co-op sellers and savvy buyers are going quiet, and why discretion often pays.

Photo by Juan Carlos Ramirez / Unsplash

By John G. Slattery, The Upper East Side Guy

If you've been house-hunting on the Upper East Side lately and felt like all the good stuff is happening behind closed doors, well, you're not imagining it. Off-market deals — the quiet, hush-hush, you-didn't-hear-it-from-me kind — have surged across New York City this past year, with private sales jumping at least 30% across Manhattan, Brooklyn, and Queens. And nowhere does the off-market game feel more at home than right here on the Upper East Side.

And I'll let you in on a secret: some of my best off-market leads didn't come from a database. They came from the other end of a leash. Since 2013, my dog-walking business, MrBorisPupConcierge.com, has had me in the lobbies, elevators, and kitchens of the neighborhood's finest buildings. Clients who trust you with their Cavalier eventually trust you with something bigger, and many of them have quietly passed my name along to friends looking to buy or sell.

So why the surge? Three reasons.

First, our beloved co-op boards. Anyone who's been through a co-op purchase knows the board approval process is not for the faint of heart. Listing publicly and then getting rejected after a long, expensive dance is a real risk. So sellers increasingly prefer to share their homes privately first, with financially qualified buyers who are ready for the board process, and only then move to contract. Off-market fits the co-op culture like a well-tailored glove.

Second, scarcity and privacy. With Manhattan's active listings down 3% and new listings down 6% from a year ago, per Corcoran's third-quarter report, and very little new construction in the pipeline, supply is tight, and discreet sellers, especially at the top of the market, hold all the cards. Exclusivity has genuine value here.

Discretion is something I learned long before real estate. Nobody keeps a secret like a dog walker. We know which doorman sneaks treats, and we've never told a soul.

Third, the industry itself has warmed to private listings, increasingly embracing them as a smart, discreet way to match the right buyer with the right home.

The numbers back it up. In 2025, Lenox Hill, right here on the Upper East Side, racked up about $493 million in off-market sales, second in all of New York City only to the Upper West Side (we'll get them next year). And the conditions behind that boom have only grown stronger. Corcoran's third-quarter 2026 report shows Manhattan closed sales up 9% from a year ago, even as fewer new homes came to market. More buyers chasing fewer homes is exactly when a quiet, well-placed listing shines.

Prewar apartment buildings and water towers across Manhattan rooftops under a bright blue sky — Photo by Clay LeConey / Unsplash

Real deals from my own past year on the Upper East Side

I keep the specifics close to the vest (discretion is the whole point, after all), but the results speak for themselves. First, a classic co-op priced in the mid-$3 millions closed within a hair of its asking price. And how did these sellers find me? Through a MrBorisPupConcierge.com referral. A happy pup-parent client passed my name along, and the rest is off-market history. Proof that some of my best leads arrive on four legs.

Next, a co-op in the $4 million range closed just shy of ask. Here's the kicker: that same apartment had previously sat on the open market at a noticeably lower price. Going off-market netted roughly a quarter million dollars more than the earlier public ask. Let that sink in.

On the buying side, I represented the very same clients who had just sold that first co-op. This one came through a relationship with another broker, which let us access the property before it ever hit the market. They sold off-market and bought off-market, picking up their new home for just under the asking price. One dog-walking referral, two off-market deals. Boris is now demanding a raise, payable in treats!

And here's a detail worth shouting about: on both properties where I represented the sellers, we went from the very first showing to a signed contract in under a month. No endless open houses, no listing growing stale on the market — just the right buyer, quickly and quietly.

Off-market, from the seller's seat: your questions answered

Will I get less money going off-market? Not in my experience. As the deals above show, off-market sales on the Upper East Side routinely land close to the asking price — and in one case, roughly a quarter million above an earlier public price. Scarcity and discretion can work in your favor, not against you.

If it's not listed, how will buyers ever find my apartment? Through relationships. A well-connected broker quietly circulates your home to a network of serious, qualified buyers and their agents. The right buyer hears about it — the whole world doesn't.

Sometimes that network is fellow brokers. Sometimes it's a grateful pup parent at the dog run who mentions their neighbor is thinking of selling. Never underestimate a conversation that starts with “Who walks your dog?”

How long does it usually take? Often faster than you'd think. Without weeks of open houses and public showings, a well-matched buyer can move quickly. My recent seller-side deals above are proof.

Is off-market right for every apartment? Not always, and I'll always tell you straight. It tends to shine for distinctive, higher-end, or co-op apartments where privacy and a smooth board process matter most. For some homes, a traditional listing is the better play — the right strategy depends on your apartment and your goals.

Pedestrians crossing a wide, tree-lined Manhattan avenue in spring bloom — Photo by Clay LeConey / Unsplash

And for buyers: why go off-market at all?

You see homes before anyone else. The best apartments often trade before they ever reach the open market. Access to off-market inventory means you're first in line, not fighting a crowd.

Less competition, less frenzy. No bidding wars with a dozen strangers, no pressure to waive every contingency in a panic. Off-market deals tend to be calmer, more considered negotiations.

Privacy cuts both ways. Discretion isn't just for sellers. Buyers who value their privacy appreciate a quiet transaction that stays out of the public record chatter.

Why buyers happily pay top dollar. It might sound backwards, but off-market buyers often pay at or near full price, and they walk away happy. They're paying for a first look at a home that may not come around again, a calm negotiation without a bidding war, and a quiet deal that stays out of the spotlight. On the Upper East Side, where the right classic six or townhouse can be a once-in-a-decade find, that kind of access is worth every penny. Just ask the buyers of that second co-op above, who happily paid roughly a quarter million more than its earlier public asking price.

It comes down to relationships. Getting into off-market deals takes a broker with the network to open those doors — exactly how my buyer clients found their new home before it ever hit the market.

And some of those doors were first opened by a wagging tail. Over the years, MrBorisPupConcierge.com clients have introduced me to buyers and sellers alike, proof that a well-walked dog makes an excellent networker.

The through line

Every one of these deals landed within a whisker of asking — and in one case, well above an earlier public price. Off-market isn't about selling for less in the quiet. On the Upper East Side, it's often about selling for more, with less drama.

Because in the off-market world, we get things done quickly, we get them done quietly — and that's exactly how people like it done on the Upper East Side.

If you're thinking about buying or selling and wondering whether the off-market route makes sense for you, let's talk. Quietly, of course.

Call me at 646-245-5914, email me at JGSlattery@corcoran.com, or find me on Instagram at @johngslattery.realestate.

Boris would like it noted that he expects a referral fee for every introduction. He has agreed to accept it in biscuits. 😄

John G. Slattery is a Licensed Real Estate Salesperson with Corcoran.