- Year built
- 2007
- Type
- Condominium
- Landmark
- No
Every recorded sale at this building, 2015–2026
Price-per-square-foot over time, the line- and floor-premium curves, and every recorded sale.
- Median $/sf
- $1,651
- Listing discount
- -1.8%
- Recorded sales
- 170
- On record
- 2015–2026
Halcyon, at 305 East 51st Street, is a 32-story luxury condominium completed in 2007 — one of the more polished products of the mid-2000s condominium wave in Turtle Bay. With 123 residences, a glass-and-limestone envelope, and a genuinely high-specification finish program, it was conceived as a step above the workhorse condominiums that filled in eastern Midtown during the same years. Its calling card, and the reason it still draws amenity-minded buyers, is a windowed 52-foot indoor lap pool — a rarity at this scale and price tier.
The building sits in the heart of Turtle Bay, the quiet, tree-lined residential pocket of eastern Midtown that has long appealed to people who want central convenience without Midtown's noise — the United Nations district, the East River, and the Plaza District all within reach. Halcyon brought new-construction condominium product, with its flexible ownership rules and resort-grade amenities, to a corridor still dominated by post-war co-ops and rentals.
For buyers, the appeal is the package: condominium flexibility, a full-service staff, a serious pool-and-spa amenity floor, and high-specification residences, in a calm, central, transit-rich neighborhood.
Architecture and unit composition
Halcyon presents as a refined contemporary tower: a predominantly glass shaft warmed by a palette of limestone cladding and bronze metalwork, rising 32 stories to capture sweeping open views in every direction. The architecture is deliberately elevated for its category — the materials and detailing signal a building positioned at the top of the 2000s Turtle Bay condominium set.
The 123 residences carry 10-foot ceilings, floor-to-ceiling double-paned windows, and wide-plank smoked-oak flooring, with custom kitchens, Calacatta Gold marble surfaces, and premium integrated appliances — a finish level that has held up well and that distinguishes resales here from the more standard product nearby. Higher floors command open city, river, and skyline views; the tower's slender footprint means light on multiple exposures across most lines.
Local Law 97
- 2024–2029 annual penalty
- $0 (under cap)
- 2030–2034 annual penalty
- $75,042/yr
- Per unit / month range
- $0 – $51
Facade safety — Local Law 11
The facade passed its last inspection with no required repairs — nothing to budget for here, and no facade assessment on the horizon for roughly five years.
QEWI = Qualified Exterior Wall Inspector — the licensed engineer the city requires to sign the report (the independent expert, not the managing agent). Source: NYC DOB facade filings (FISP) · The Roebling Research Library.
See the full facade history →Recent sales
Recent closings at this building, curated by The Roebling Team research desk. Apartment-level facts are independently verified before publishing; sale prices reflect the recorded transfer amount at the NYC Department of Finance.
| Date | Unit | Apartment | Price | PPSF | vs. Ask |
|---|---|---|---|---|---|
| Jun 9, 2026 | 11D | 1 BR · 1 BA · 953 sf | $1,560,000 | $1,637/sf | -2.2% |
| Mar 30, 2026 | 6G | 2 BR · 3 BA · 2,144 sf | $2,700,000 | $1,259/sf | -3.6% |
| Mar 20, 2026 | 89B | 4 BR · 4.5 BA · 3,078 sf | $4,500,000 | $1,462/sf | -9.1% |
| Mar 20, 2026 | RU8B | 3,078 sf | $4,500,000 | $1,462/sf | off-mkt |
| Jan 9, 2026 | 15F | 2 BR · 2 BA · 1,443 sf | $2,100,000 | $1,455/sf | off-mkt |
| Sep 5, 2025 | 3E | 1 BA · 752 sf | $890,000 | $1,184/sf | -6.3% |
| Jul 18, 2025 | 14B | 2 BR · 2 BA · 1,518 sf | $2,100,000 | $1,383/sf | -27.5% |
| Apr 15, 2025 | 24A | 3 BR · 3.5 BA · 2,408 sf | $4,350,000 | $1,806/sf | -3.3% |
Market read. Most recent trades (2026) cleared a median $1,651/sf across 4 sales. Median listing discount -1.8% over ask.
The retrade record
Lines that have traded more than once in the public record — the building’s appreciation arc, apartment by apartment.
Other recent transfers
| Date | Unit | Price |
|---|---|---|
| Feb 23, 2018 | 14C | $1,475,000 |
| Jul 25, 2017 | RU6E | $577,982 |
| Jul 25, 2017 | PH32A | $5,419,274 |
| Jul 25, 2017 | PH32B | $5,306,387 |
| Jun 1, 2016 | RU14C | $1,126,020 |
Full closing history with price-per-square-foot over time, the complete retrade record, and every line that has traded.
Sales sourced from NYC Department of Finance recorded transfers (BBL 1-01344-7503) and verified listing data. Apartment-level facts (line, condition, asking-price context) curated and cross-verified by The Roebling Team research desk. Not all transactions cross-verify with ACRIS records — sponsor and LLC purchases sometimes record at stipulated values rather than market price; square footage from recorded condo declarations and offering plans.
What to know if you’re buying
Halcyon is a condominium, which is its structural advantage in a corridor heavy with co-ops. Financing is flexible, there is no co-op board admissions process — purchases clear a lighter condominium right-of-first-refusal — and pied-à-terre, investment, trust, and LLC purchases are customary, with resale and subletting materially freer than at a co-op. For buyers who want resort-grade amenities and ownership flexibility in central Midtown East, the building is a logical target.
Underwrite the full carrying picture. Common charges fund the doorman, the pool and amenity floor, and building operations; real estate taxes complete the monthly figure. The lap pool and spa add operating cost relative to a bare-bones building — a fair trade for the lifestyle, and one we help buyers weigh against the alternatives.
What to know if you’re selling
Halcyon sells on its pool and its finish quality. The windowed 52-foot lap pool, the spa, and the high-specification residences are concrete, marketable differentiators that set the building apart from the more standard Turtle Bay condominium stock — and they reach amenity-driven and wellness-minded buyers directly.
Price to the upper tier of the Midtown East condominium set, adjusted for floor, exposure, and view. A high-floor line with open views and original-quality finishes belongs at the top of the building's range. Condominium closing mechanics — a right-of-first-refusal rather than a board process — are themselves a selling point to the flexibility-minded buyer this building attracts, and a clean, well-staged listing converts quickly given the building's amenity story.
Comparable buildings
If you're considering Halcyon, also evaluate nearby Turtle Bay and Midtown East buildings:
- 400 East 51st Street (The Grand Beekman) — full-service building on the same street
- 300 East 59th Street — full-service Midtown East building
- 345 East 56th Street — Sutton-area co-op nearby
- 100 East 53rd Street — Midtown East condominium
- 250 East 53rd Street (The Veneto) — Midtown East condominium
The Roebling Team at Halcyon
The Roebling Team at Compass specializes in Midtown East, Turtle Bay, Sutton Place, and the broader full-service Manhattan condominium market. We publish this profile because buyers and sellers at amenity-rich condominiums deserve building-specific intelligence — the amenity set, the carrying-cost picture, and where each line sits against the corridor.
If you're weighing a purchase or sale at Halcyon, a 30-minute consultation is the right starting point — we'll walk the building, the numbers, and the comparison set with you.
Get the full picture on this building.
Current availability including off-market, the full comp set, and the board & financials read most listings don't show.