Milton Coste

67 Flatiron Concierge Buildings

White-glove service with dedicated concierge staff in Flatiron, Manhattan

All NYC Flatiron
67 results
10 W 15TH Street #1021 For Sale
Victoria Lee Reichelt at Corcoran Group
$975,000

1 bd · 1 ba · Co-op

10 W 15TH Street #1021, New York City

MLS: RLS20100486 RLS at REBNY
260 PARK Avenue #10I For Sale
Frances W Katzen at Douglas Elliman Real Estate
$2,199,000

2 bd · 3 ba · 1,328 sqft · Condo

260 PARK Avenue #10I, New York City

MLS: RLS20046865 RLS at REBNY
15 Union Square #16 For Sale
Shachar Dinour at Triumph Property Group Ltd
$7,995,000

3 bd · 4 ba · 2,849 sqft · Condo

15 Union Square #16, New York City

MLS: RLS20082312 RLS at REBNY
254 PARK Avenue #2PR For Sale
John McSherry at Douglas Elliman Real Estate
$1,849,000

2 bd · 2 ba · 1,235 sqft · Condo

254 PARK Avenue #2PR, New York City

MLS: RLS20062881 RLS at REBNY
15 UNION Square #5A For Sale
Meris G Blumstein at Corcoran Group
$6,500,000

2 bd · 3 ba · 2,200 sqft · Condo

15 UNION Square #5A, New York City

MLS: RLS20093571 RLS at REBNY
23 E 22nd Street #55 For Sale
Matteo Rignanese at R New York
$16,995,000

4 bd · 4 ba · 3,310 sqft · Condo

23 E 22nd Street #55, New York City

MLS: RLS20026208 RLS at REBNY
280 Park Avenue #12-M For Sale
Stephanie G Harnisch at William Raveis New York City LLC
$1,500,000

1 bd · 1 ba · 780 sqft · Condo

280 Park Avenue #12-M, New York City

MLS: RLS20101706 RLS at REBNY
4 W 21ST Street #7B For Sale
Joshua B Rubin at Douglas Elliman Real Estate
$1,350,000

2 bd · 3 ba · 1,475 sqft · Condop

4 W 21ST Street #7B, New York City

MLS: RLS20091794 RLS at REBNY
10 Madison Square #3B For Sale 3D
Maryellen Cashman at Compass
$4,250,000

3 bd · 4 ba · 2,043 sqft · Condo

10 Madison Square #3B, New York City

MLS: RLS20105810 RLS at REBNY
254 Park Avenue #6PR For Sale
Jason Wang at Compass
$1,775,000

2 bd · 2 ba · 1,235 sqft · Condo

254 Park Avenue #6PR, New York City

MLS: RLS20054046 RLS at REBNY
50 LEXINGTON Avenue #16D For Sale
Jonathan Jossen at Corcoran Group
$1,295,000

2 bd · 2 ba · Co-op

50 LEXINGTON Avenue #16D, New York City

MLS: RLS20090437 RLS at REBNY
16 W 16TH Street #1UN For Sale
Dennis J Margulies at Douglas Elliman Real Estate
$649,000

1 bd · 1 ba · Co-op

16 W 16TH Street #1UN, New York City

MLS: RLS20102050 RLS at REBNY

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This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., All rights reserved.

Listings are updated approximately every 15 minutes. Data displayed by Keller Williams NYC.

RLS at REBNY

Concierge Buildings for Sale in NYC

The distinction between a doorman building and a true concierge building is meaningful: a doorman announces guests, while a concierge actively manages services on behalf of residents. After 25+ years working in Upper Manhattan and across the five boroughs, I find that buyers seeking concierge buildings prioritize security, delivery management, and smooth vendor access above all else. See active inventory in our co-op search, review Midtown East market data, or read our co-op board guide.

What services do concierge buildings provide?

24-hour staffed lobby, package acceptance, guest registration, taxi coordination, dry-cleaning valet, and move-in scheduling. High-end buildings may add restaurant reservations, housekeeping referrals, and resident portals for maintenance requests.

How do concierge building costs compare?

In Manhattan, full-service co-op maintenance fees run 15 to 30 percent higher than comparable non-doorman buildings, primarily because 24-hour staffing is the single largest budget line item. Request the most recent annual operating statement before offering.

Are there concierge co-ops as well as condos?

Yes. Many of Manhattan's most established concierge buildings are co-ops, particularly along Fifth Avenue, Park Avenue, and Central Park West. These pre-war buildings have maintained full-service staffing for decades but often have stricter board approval processes.

Buying Tip from Milton Coste

Many buildings marketed as "concierge" only provide attended lobby service during daytime hours, switching to virtual doorman overnight. Ask the managing agent for the full weekly staffing schedule and confirm whether overnights and weekends are covered.

Milton Coste, Licensed Real Estate Associate Broker

Milton Coste

Licensed Real Estate Associate Broker

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Milton Coste, Licensed Real Estate Associate Broker, KWNYC