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$1,050,000
MLS# RLS20119675 · Midtown East
Listed December 10, 2025 · 320 days on the market
1 Beds 1 Baths 843 Sq.Ft.
Introducing Unit 5A at Halcyon, a luxurious residential oasis nestled in the heart of Turtle Bay at 305 East 51st Street. This exquisite one-bedroom, one-bathroom residence boasts a generous 843 square feet of impeccably designed living space, offering an unparalleled blend of comfort and sophistication.
Built in 2015 and designed by the renowned SLCE Architects, Halcyon stands as a pinnacle of modern architectural excellence in the vibrant neighborhood of Turtle Bay. The interior of Unit 5A, curated by the esteemed S. Russell Groves, showcases a seamless fusion of style and functionality, creating a space that exudes elegance and comfort.
Residents of Halcyon are greeted by a host of unparalleled amenities, including a dedicated concierge and doorman, ensuring convenience and security at every turn. The building also features a lush garden with a firepit, a serene retreat within the bustling cityscape, as well as a library for quiet moments of relaxation.
For those seeking a wellness-focused lifestyle, Halcyon offers a swimming pool, fitness center, steam room, and sauna, providing residents with a comprehensive array of health and wellness amenities. The building also features a children's playroom and a golf simulator, catering to residents of all ages and interests.
With a total of 32 floors and 123 units, Halcyon epitomizes luxury living in the heart of Manhattan. Residents can also enjoy access to a roof deck, perfect for taking in breathtaking city views, as well as on-site parking for added convenience. Pet lovers will appreciate the pet-friendly policy, ensuring that every member of the family feels right at home.
Unit 5A at Halcyon presents a rare opportunity to experience the epitome of luxury living in one of New York City's most coveted neighborhoods. Don't miss your chance to call this exceptional residence home and indulge in a lifestyle defined by elegance, comfort, and unparalleled amenities.
Co-exclusive with Sieber International

Curtis Bain
Brown Harris Stevens
Services and facilities
Wellness and recreation
Outdoor space
Some building amenities are reported on other current listings in this building. Confirm amenities and building policies before relying on them.
Estimate
The rate is a placeholder, not a quote. Enter the one your lender gives you.
$8,069 / month
Not included: attorney, title insurance, lender and appraisal fees, board application and move-in fees, flip tax and prepaid items. Estimates only, based on the published New York State rates. Your attorney and lender will confirm the real figures.
Gallery
Listing Courtesy of Leven Real Estate
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.
305 E 51st Street is a 5-story walk-up apartments in Midtown East, completed in 1900 and home to 15 residential units. The most recent major alteration on record was in 1988.
The closest subway is Lexington Av/53 St (6, E, F), about a 4-minute walk. East River Walk is roughly 8 minutes away on foot.
Compiled from NYC public records and open data.
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305 E 51st Street RU5A
Walking times are estimates. Schools shown are the nearest public and charter schools and are not zone assignments; a nearby school is not necessarily the one an address is zoned for. Confirm zoning with the NYC Department of Education. Sources: MTA, NYC Parks and NYC Department of City Planning open data.
The Neighborhood
Iconic residential towers with sweeping skyline views in the heart of Manhattan's most prestigious corridor.
Walkability
9/10
Public transit
10/10
Schools
7/10
Dining
9/10
Groceries & parks
7/10
UNIS draws a global student body and offers an internationally recognized curriculum. Families also benefit from proximity to Upper East Side private schools within a short commute.
Private schools in the area include United Nations International School.
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