Halcyon
East Midtown, New York · 305 East 51st Street, New York, NY
Halcyon in East Midtown, New York has 160 recorded condominium sales dating back to 2015, a median sale price of $2.5M and an average of $1,803 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
Halcyon is one of 78 condo buildings CURVE covers in East Midtown, where the median recorded price is $1,129 per square foot. By that measure it ranks #4 of 61 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in Halcyon, by year, with that year's median price.
Sales by price point
How 160 recorded sales distribute across the price ladder.
Unit mix sold
Bedroom count across recorded sales.
10 most recent sales
| Unit | Date | Beds | Type | Price | $/SF | Change |
|---|---|---|---|---|---|---|
| RU11D | 5/7/2026 | 1 Bed | Resale 3 | $1.6M | $1,637 | -5% |
| RU6G | 3/30/2026 | 2 Beds | Resale 1 | $2.7M | $1,259 | -13% |
| RU8B | 3/20/2026 | 2 Beds | Resale 1 | $4.5M | $2,964 | -35% |
| RU15F | 1/9/2026 | 2 Beds | Resale 1 | $2.1M | $1,455 | -17% |
| RU3E | 9/5/2025 | Studio | Resale 1 | $890K | $1,184 | -26% |
| RU14B | 7/18/2025 | 2 Beds | Resale 1 | $2.1M | $1,383 | -24% |
| RU24A | 4/15/2025 | 3 Beds | Resale 1 | $4.3M | $1,806 | -9% |
| RU4A | 1/30/2025 | 1 Bed | Resale 1 | $750K | $890 | -43% |
| RU6D | 2/27/2024 | 3 Beds | Resale 1 | $3.1M | $1,471 | -9% |
| RU4B | 12/6/2023 | 2 Beds | Resale 1 | $1.8M | $1,103 | -28% |
The full Halcyon record
You are seeing the summary. Members see the deeds.
No credit card required.
More buildings in East Midtown
About this record
Where does this data come from?
Every sale shown is a deed recorded with the New York registry — the legal record of the transaction, not a listing or an estimate. CURVE assembles, verifies and reconciles each one to the building and the unit.
How many sales are in Halcyon?
160 recorded sales, going back to 2015, of which 37 are resales. This page shows the 10 most recent; members see all of them.
What has Halcyon done over time?
Resales in the building have changed hands at an average of -3.9% against their prior recorded price, after an average hold of 5.2 years.
What do members see that I don't?
The complete sales table, each unit's full chain of title, buyer and seller names, financing detail, the deed book and page behind every figure, the condo documents, and reports you can send to a client.