The Harper
Upper East Side, New York · 310 East 86th Street, New York, NY
The Harper in Upper East Side, New York has 33 recorded condominium sales dating back to 2024, a median sale price of $3.3M and an average of $2,001 per square foot. Every figure below is drawn from recorded deeds — not listings, not estimates.
The Harper is one of 135 condo buildings CURVE covers in Upper East Side, where the median recorded price is $1,763 per square foot. By that measure it ranks #50 of 135 in the neighborhood.
The record
Sales activity
Recorded sales by year
Every deed recorded in The Harper, by year, with that year's median price.
Sales by price point
How 33 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 |
|---|---|---|---|---|---|---|
| 19A | 5/8/2026 | — | Developer Sale | $3.6M | — | — |
| 15C | 2/25/2026 | — | Developer Sale | $6.0M | — | — |
| 7A | 2/13/2026 | 2 Beds | Resale 1 | $2.1M | $1,951 | 0% |
| 16C | 1/20/2026 | 3 Beds | Developer Sale | $4.1M | $2,130 | — |
| 3A | 12/9/2025 | 2 Beds | Developer Sale | $2.1M | $1,906 | — |
| 8D | 11/17/2025 | 3 Beds | Developer Sale | $3.5M | $1,864 | — |
| 17C | 11/14/2025 | 3 Beds | Developer Sale | $4.0M | $2,088 | — |
| 14B | 10/30/2025 | 3 Beds | Developer Sale | $4.4M | $2,267 | — |
| 3D | 9/19/2025 | 3 Beds | Developer Sale | $3.1M | $1,700 | — |
| 18C | 7/25/2025 | 3 Beds | Developer Sale | $4.0M | $2,100 | — |
The full Harper record
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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 The Harper?
33 recorded sales, going back to 2024, of which 1 are resales. This page shows the 10 most recent; members see all of them.
What has The Harper done over time?
Resales in the building have changed hands at an average of +0.0% against their prior recorded price, after an average hold of 0.8 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.