Dec 520 Park Ave Bldg report

Carol Staab

Associate Broker | Sotheby’s International Realty | License #: 30ST0761874 O: 917-273-7787 carol.staab@sothebys.realty

520 Park Avenue

LENOX HILL, MANHATTAN 51 Floors

42 Units

Report Date: December 3rd, 2025

2018 Year Built

Building Type: Building Stage: Sales Started: Closings Started: Offering Type:

$15M - $78.96M Sold Last 24-Months

Condo Resale 11 Years Ago (04/26/2015) 7 Years Ago (08/30/2018) New Construction Condominium Zeckendorf Development, Global Holdings Robert A. M. Stern Architects, Slce Architects --

Developer: Architect: Landscape Design:

SUMMARY 520 Park Avenue is a luxury residential tower located in Lenox Hill, completed in 2018 by developers Zeckendorf Development and Global Holdings, with architectural design by Robert A. M. Stern Architects and SLCE Architects. The limestone-clad building rises 51 floors and contains 42 units. Building amenities include 24-hour concierge and doorman services, elevators, a landscaped garden, an indoor swimming pool with

double-height ceilings, fitness center and pilates studio, resident lounge, screening room, parking, and pet-friendly policies. The property lies at the intersection of the Upper East Side Historic District and the Plaza District, providing convenient access to Central Park, Fifth Avenue shopping, fine dining, and cultural institutions.

AMENITIES Concierge

Doorman

Elevator

Garden

Swimming Pool

Fitness Center

Parking

Pets Allowed

Valet

Bike Storage

Package Room

Refrigerated Storage

Storage

Cinema Room

Playroom

Bike Room

Balcony

Outdoor Space

Lobby Attendant

Laundry

Wine Room

Central-Air

In-Unit-washer-dryer

Source: Marketproof | For informational purposes only, data from entities deemed reliable, but may contain errors, omissions, or changes without notice.

Carol Staab

Associate Broker | Sotheby’s International Realty | License #: 30ST0761874 O: 917-273-7787 carol.staab@sothebys.realty

520 Park Avenue

BUILDING ANALYSIS PRICING OVERVIEW (24-MONTHS)

$16.8M

$3,635

Avg Asking Price

$48.73M

Avg Asking PPSF

$4,001

Avg Sold Price

Avg Sold PPSF

The average asking price of units at 520 Park Avenue is $16.8M, with an average price per square foot of $3,635. The average sold price stands notably higher at $48.7M with a sold price per square foot of $4,001. Units in the building are full-floor simplex

and duplex residences, totaling 42 units. These figures provide insight into the building's luxury status and high-value market positioning, reflecting significant demand and premium pricing trends over the past 24 months.

UNIT MIX

SOLD PPSF (24-MONTHS) 27

No pricing info available 7 Studio

1 2 Bed

7 3 Bed

4+ Bed

RECENT SALES IN THIS BUILDING DATE

UNIT

BED/BATH

SQ FT

SOLD PRICE

SOLD PPSF

07/29/2025 (sold)

APT 31

4/5

4,628 Sq ft

$22,000,000

$4,754

11/20/2024 (sold)

# DPH63

5 / 6.5

--

$78,964,000

--

11/20/2024 (sold)

APT 4D

0/1

--

$78,964,000

--

11/20/2024 (sold)

APT 4E

0/1

--

$78,964,000

--

09/13/2024 (sold)

APT 21

4/5

4,628 Sq ft

$18,500,000

$3,997

06/25/2024 (sold)

APT 17

4 / 5.5

4,613 Sq ft

$14,999,400

$3,252

09/18/2023 (sold)

APT 19

4 / 5.5

4,613 Sq ft

$17,000,000

$3,685

06/20/2023 (sold)

APT 36

4/5

4,628 Sq ft

$37,500,000

$8,103

01/30/2023 (sold)

APT 23

4/5

4,628 Sq ft

$21,500,000

$4,646

08/4/2022 (sold)

APT 32

4/5

4,628 Sq ft

$27,000,000

$5,834

Source: Marketproof | For informational purposes only, data from entities deemed reliable, but may contain errors, omissions, or changes without notice.

Carol Staab

Associate Broker | Sotheby’s International Realty | License #: 30ST0761874 O: 917-273-7787 carol.staab@sothebys.realty

LENOX HILL

NEIGHBORHOOD ANALYSIS CONTRACTS Sales Contract Activity in Lenox Hill / Q3 2025

3

49

91

-57.1% Quarter-over-Quarter -72.7% Year-over-Year

-2% Quarter-over-Quarter 22.5% Year-over-Year

-34.1% Quarter-over-Quarter 7.1% Year-over-Year

NEW DEV

CONDO

CO-OP

During the last quarter in Lenox Hill, there were 158 contracts encompassing 3 new developments, 49 resale condos, and 91 resale coops. This marks an increase from 147 contracts the previous year, which included 11 new developments, 40 resale condos, and 85 resale coops. The number of resale condos and

coops has grown, while new development contracts have decreased compared to the previous period. Overall, the neighborhood shows heightened transaction activity across resale properties.

291

150

75

52

52 0

0 2 3 Q

0 2 3

2 1 Q

42

0 2 1 Q

Q

42

0 2 3 Q

32

0

32 2 1 Q

0 2 1 Q

2 3 Q

0

2 2 0

22

12 2 3 Q

Q

0

0 2 3

12

02

0

2 1 Q

02 2 1 Q

Source: Marketproof | For informational purposes only, data from entities deemed reliable, but may contain errors, omissions, or changes without notice.

Carol Staab

Associate Broker | Sotheby’s International Realty | License #: 30ST0761874 O: 917-273-7787 carol.staab@sothebys.realty

LENOX HILL

NEIGHBORHOOD ANALYSIS PRICE Average Sold Price / SF in Lenox Hill / Q3 2025

$1,823

$1,684

$1,090

-3.5% Quarter-over-Quarter -9.5% Year-over-Year

13.9% Quarter-over-Quarter 13.9% Year-over-Year

0.8% Quarter-over-Quarter 2.6% Year-over-Year

NEW DEV

CONDO

In the last completed quarter, average price per square foot (PPSF) in Lenox Hill increased across all property types compared to the year-over-year quarter. New developments averaged $1,823 PPSF, condos averaged $1,684 PPSF, and coops averaged $1,090 PPSF. Compared to the last year, condo

CO-OP

prices per square foot rose from $1,478 to $1,684, reflecting an upward trend. 520 Park Avenue’s average asking PPSF of $3,635 significantly exceeds neighborhood averages for condo new developments, underscoring its position in the ultra-luxury segment of the market.

$3K

$2K

$750

52

52

42

42

32

32

22

22

12

12

02

02 0

0

0

0

0

0

0

0

0

0

0

0

2 1 Q

2 3 Q

2 1 Q

2 3 Q

2 1 Q

2 3 Q

2 1 Q

2 3 Q

2 1 Q

2 3 Q

2 1 Q

2 3 Q

Source: Marketproof | For informational purposes only, data from entities deemed reliable, but may contain errors, omissions, or changes without notice.