Co-op3 Active Sales1 Active Rental

The Diplomat

311 East 71st Street·Upper East Side · Manhattan · NY · 10021

Units

Stories

1962

Built

Photos

Overview

The Diplomat, at 311 East 71st Street, is a 13-story elevator co-op building in Upper East Side, Manhattan. Built in 1962, it has 96 units.

Available Now

4 units

$550,000Unit 10A1 bd · 1 ba · 668 SF

$550,000Unit 10F1 bd · 1 ba · 850 SF

$325,000Unit 8EStudio · 1 ba

For Rent

$6,500/moUnit 11C1 bd · 1 ba · 800 SF

Building Details

TypeCo-op

EraPost-war

ClassD4 · Elevator Cooperative

Elevators2

Gross square feet80,056

Lot size10,216 SF

Lot dimensions100 × 102.2 ft

ZoningR8B

BIN1044859

BBL1014460008

Features & Amenities

Bike StorageElevatorsGreen BuildingPackage RoomStorage

Unit Mix

Studio13 units

1 BR36 units

2 BR8 units

3 BR2 units

4 BR2 units

Building Policies

PetsNot allowed

Flip Tax1.75%

Building Statistics

Sales(24 months)

Total

$648,625

Avg Price

$846

Avg $/SF

Avg Sales / Year

218

Avg DOM

Stats by Layout(averages use the last 24 months, or up to 5 years for a layout with few recent sales)

Layout	Avg Price	Avg $/SF	Last Sold
Unknown	$495,000	-	$495,000 · Apr '26
Studio	$361,667	$645	$355,000 · Oct '25
1 BR	$581,250	-	$500,000 · Sep '25
2 BR	$1,047,000	$902	$999,000 · Jun '26
3 BR	-	-	$1,650,000 · Jul '21
4 BR	-	-	$2,370,000 · Nov '18

Transaction History

Unit	Date	Status	BR	BA	SF	Price	PPSF	Records
10A	Sep 30, 2026	Active	1	1	668	$550,000	$823	RLS20118260
10F	Sep 8, 2026	Active	1	1	850	$550,000	$647	RLS20113173
8E	Sep 8, 2026	Active	Studio	1	-	$325,000	-	RLS20106803
8G	Jun 17, 2026	Closed	2	2	-	$999,000	-	RLS20004008 ACRIS
2D	Oct 29, 2025	Closed	Studio	1	-	$355,000	-	RLS20020401 ACRIS
9H	Sep 15, 2025	Closed	1	1	750	$465,000	$667	RLS11033448 ACRIS
3F	Aug 20, 2025	Closed	1	1	-	$510,000	-	RLS20007950 ACRIS
12F	Jul 8, 2025	Closed	2	2	1,200	$1,015,000	$846	RLS20010482 ACRIS
1H	Nov 4, 2024	Closed	1	1	-	$795,000	-	RLS10993037 ACRIS
9F	Sep 24, 2024	Closed	1	1	900	$480,000	$533	RLS10981643 ACRIS
3G	Jun 17, 2024	Closed	2	2	1,200	$1,149,000	$958	RLS10970831 ACRIS
12E	Nov 1, 2022	Closed	1	1	667	$550,000	$825	RLS10806364 ACRIS
4G	Aug 11, 2022	Closed	2	2	-	$1,025,000	-	RLS10789131 ACRIS
10H	Jul 18, 2022	Closed	1	1	-	$530,000	-	RLS10784141 ACRIS
PHA	May 26, 2022	Closed	1	1	1,100	$1,070,000	$973	RLS10773272 ACRIS
1H	Apr 7, 2022	Closed	1	1	-	$455,000	-	RLS10764412 ACRIS
9B	Feb 9, 2022	Closed	1	1	-	$585,000	-	RLS10755290 ACRIS
7D	Jan 6, 2022	Closed	Studio	1	825	$375,000	$455	RLS10812070 ACRIS
5D	Nov 16, 2021	Closed	Studio	1	550	$355,000	$645	RLS10732165 ACRIS
10D	Oct 1, 2021	Closed	Studio	1	550	$397,000	$722	RLS10689503 ACRIS