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The Harbour At Bayridge - 9921 4th Avenue, Brooklyn, NY 11209 Property Information

Q: How many residential units does this building have?

This building has 52 residential units and 4 commercial spaces.

Due to the nature of this address' parcel subdivisions, there may be only limited information available in this property report. To explore the full range of property information for this address, log in or create a free account and view the property reports of each individual parcel.

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Address

Building name	The Harbour At Bayridge
Primary address	The Harbour At Bayridge - 9921 4th Avenue
Secondary address	401-411 100th St
Neighborhood	Bay Ridge

Zip code	11209
Borough	Brooklyn
Block & lot	06135-7501

Sales & Tax Overview for 9921 4th Avenue, Brooklyn

View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.

Tax class	Register

Lot & Building Information for 9921 4th Avenue, Brooklyn

Lot sqft	21,938
Lot dimensions	195 ft x 113 ft
Building class	Special Condominium Billing Lot (R0)
Building sqft	60,397
Buildings on lot	1
Stories	6

Year built	1987
Frontage(s)	99 Street (narrow) 100 Street (narrow) 4 Avenue (wide)

Zoning & Use for 9921 4th Avenue, Brooklyn

Zoning	Register
Residential units (DOF)	52

Commercial units	4
Residential sqft	Register

Units & Related Parcels

Unit	Sale Date	Sale Price	Sqft	Price/Sqft
Unit 2A	03/04/2008		1,003
Unit 2B	05/20/2022		826
Unit 2C	07/17/1987		919
Unit 2D	04/20/2004	Register	919	Register
Unit 2E	10/15/2012	Register	826	Register
Unit 2F	05/23/2023		1,110
Unit 2G	09/28/2009		721
Unit 2H	08/29/2024		919
Unit 2I	06/30/2025	Register	919	Register
Unit 2J	10/05/2018	Register	826	Register
Unit 3A	04/20/1999		1,003
Unit 3B	06/30/2021		826
Unit 3C	05/16/2025		919
Unit 3D	11/06/1987		919
Unit 3E	02/13/2013	Register	826	Register
Unit 3F	09/29/2016	Register	1,110	Register
Unit 3G	05/19/2021	Register	826	Register
Unit 3H	12/04/2019	Register	919	Register
Unit 3I	02/20/1998		919
Unit 3J	12/15/2005	Register	826	Register
Unit 4A	05/30/2014	Register	1,003	Register
Unit 4B	10/21/2020	Register	826	Register
Unit 4C	12/21/2000		919
Unit 4D	01/13/2015	Register	919	Register
Unit 4E	12/11/1997		826
Unit 4F	01/26/2012	Register	1,110	Register
Unit 4G	04/17/1998		826
Unit 4H	01/28/2005	Register	919	Register
Unit 4I	12/28/2020		919
Unit 4J	04/11/2019	Register	826	Register
Unit 5A	08/02/2019	Register	1,003	Register
Unit 5B	06/11/2019	Register	826	Register
Unit 5C	06/30/2004	Register	919	Register
Unit 5D	04/25/2022		919
Unit 5E	07/29/2011	Register	826	Register
Unit 5F	08/08/2003	Register	1,110	Register
Unit 5G	06/17/2004		826
Unit 5H	11/19/2010	Register	919	Register
Unit 5I	12/30/2022		919
Unit 5J	01/25/2007	Register	826	Register
Unit 6A	07/25/2022	Register	1,003	Register
Unit 6B	12/01/2003	Register	826	Register
Unit 6C	12/01/2003	Register	919	Register
Unit 6D	07/03/2013	Register	919	Register
Unit 6E	09/15/2016	Register	826	Register
Unit 6F	06/10/2022		1,110
Unit 6G	01/21/2004	Register	826	Register
Unit 6H	04/19/2000		919
Unit 6I	06/15/2010		826
Unit 6J	05/23/2008	Register	826	Register
Unit L1	09/20/2023	Register	1,005	Register
Unit L2	09/20/2023	Register	1,005	Register
Unit P1	08/11/2020		2,848
Unit P2	12/23/2025		2,515
Unit P3	09/06/2017	Register	2,115	Register
Unit P4	09/06/2017	Register	1,896	Register

Page 1 of 4 | Show All

Area Overview

Walk Score

Transit Score

Bike Score

School district	20
Community district	10

Closest police station	1.74 Miles
Closest fire station	0.34 Miles

View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.

Other Property Data for 9921 4th Avenue, Brooklyn

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Floor area ratio (FAR) for The Harbour At Bayridge - 9921 4th Avenue, Brooklyn, NY 11209, including commercial and residential FAR, FAR as built and usable floor area.

Development maps such as planimetric, zoning, urban landscape, and HPD alternative enforcement program maps.

Violations for The Harbour At Bayridge - 9921 4th Avenue, Brooklyn, NY 11209, including DOB violations, ECB violations, HPD violations and 311 complaints.

Alternate Addresses

You will find all alternate addresses for the property in this section.

401-411 100th St, Brooklyn, NY 11209
9911-9923 4th Ave, Brooklyn, NY 11209
402-412 99th St, Brooklyn, NY 11209

About 9921 4th Avenue, Brooklyn

What is the year built & the total sq. ft. for The Harbour At Bayridge - 9921 4th Avenue, Brooklyn, NY 11209?

The Harbour At Bayridge - 9921 4th Avenue, Brooklyn, NY 11209 was built in 1987 and has a total of 60,397 square feet.

How many residential units does this building have?

This building has 52 residential unit(s) and 4 commercial spaces.

Ownership Information for 9921 4th Avenue, Brooklyn

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Property owner name for The Harbour at Bayridge - 9921 4th Avenue, Brooklyn, NY 11209

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Building contacts for The Harbour at Bayridge - 9921 4th Avenue, Brooklyn, NY 11209

Building management:	Register
Representatives (from permits):	Register
Tenants:	Register

Commercial Real Estate nearby

Real Estate Reports:

Eliza Theiss, Apr 23, 2026 $4.6M Hudson Yards Maintains Top Spot, Luxury Sales in Malba Set $2.5M Price Record for Queens

Despite prices declining, Hudson Yards remained the most expensive NYC neighborhood, but TriBeCa’s growth closed the gap to under $400,000, while Malba set a new historic price record for Queens at $2.5 million, securing the highest ranking ever for the borough at #5.

Eliza Theiss, Mar 19, 2026 Cheaper in the City? Nearly 100 Communities in Suburban NYC Surpass $1M

New Yorkers planning a move to the suburbs increasingly find their options limited, after suburban home values shot up twice as fast as NYC medians over the last decade. While larger homes and better prices were long the norm outside the five boroughs, today, many NYC buyers find their option restricted to a handful of suburban markets.

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Past Sales & Property History for 9921 4th Avenue, Brooklyn

Create a free account to view the complete sales history for 9921 4th Avenue, Brooklyn, including title documents, transfer conditions, mortgages, liens, and pre-foreclosures.

No recorded sales for this property.

Title Documents for 9921 4th Avenue, Brooklyn

Data not available for this property.

Assessment History for 9921 4th Avenue, Brooklyn

Data not available for this property.

Permits for 9921 4th Avenue, Brooklyn

The complete history of permits filed for 9921 4th Avenue, Brooklyn, including new construction or demolition permits, plus any work pertaining to plumbing, heating and sprinkler systems is available with a free account. Available data goes back to 1990.

Filing date	Job type	Job status	Job description	Initial cost
02/20/2024	Alteration
06/12/2022	Alteration
05/24/2022	Alteration
09/15/2021	Alteration
09/05/2019	Alteration
08/22/2019	Alteration
12/28/2018	Alteration type 2
02/16/2011	Alteration type 2
01/11/2011	Alteration type 2
01/11/2011	Alteration type 2

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More about New York City Property Records

Bay Ridge Residential Market Stats

Access a detailed real estate market overview of Bay Ridge so you can assess current trends, home values, types of properties sold and transaction volume.
View the median home sale price in Bay Ridge and compare it to other neighborhoods in Brooklyn.

Median Sale Price

$460,000

-7.1% YoY

Median Price/Sqft

$816

7.8% YoY

Brooklyn Median Sale Price

$885,000

2.5% YoY

Check out recently sold homes in Brooklyn and see how their prices compare.

Risk

FEMA flood zone(s):	X (See more on map)

Transportation

Distance to Subway

Closest station

4th Ave & 95th St at SW Corner

Station lines

Distance (miles)

0.229

View subway map

Bus Routes
Name	4 Av/100 St
Line	B63
Distance (miles)	0.019

Schools

Nearest elementary schools

Name	Rating	Att. zoned	Type	Grade range	No of students	Distance to school (mi)
P.S. Is 104 The Fort Hamilton School	7	Yes	Public	K-8	1,103	0.42
St Patrick School	NR	No	Private	PK-8	167	0.16
St Patrick School	NR	No	Private	PK-8	167	0.16
Poly Prep Country Day School	NR	No	Private	PK-12	1,060	0.41
Poly Prep Country Day School	NR	No	Private	PK-12	1,060	0.41

Nearest middle schools

Name	Rating	Att. zoned	Type	Grade range	No of students	Distance to school (mi)
P.S. Is 104 The Fort Hamilton School	7	Yes	Public	K-8	1,103	0.42
St Patrick School	NR	No	Private	PK-8	167	0.16
Poly Prep Country Day School	NR	No	Private	PK-12	1,060	0.41
Visitation Academy	NR	No	Private	PK-8	114	0.60
Adelphi Academy	NR	No	Private	PK, K-12	0	0.79

Nearest high schools

Name	Rating	Att. zoned	Type	Grade range	No of students	Distance to school (mi)
Fort Hamilton High School	4	Yes	Public	9-12	3,925	1.04
Fontbonne Hall Academy	NR	No	Private	9-12	439	0.19
Poly Prep Country Day School	NR	No	Private	PK-12	1,060	0.41
Adelphi Academy	NR	No	Private	PK, K-12	0	0.79
Bay Ridge Preparatory School	NR	No	Private	K-12	375	1.32

Neighbors for 9921 4th Avenue, Brooklyn

Here are the neighbors for The Harbour At Bayridge - The Harbour At Bayridge - 9921 4th Avenue, Brooklyn, NY 11209.

Address	Square feet	Purchase date	Purchase price
416 99th St, Brooklyn	1,692	06/16/2022
424 99th St, Brooklyn	1,716	07/23/2023
432 99th St, Brooklyn	1,455	06/29/2011	$725,000
425 100th St, Brooklyn	2,396	08/19/2016	$990,000
426 99th St, Brooklyn	1,599	03/09/2020	$1,175,000
436 99th St, Brooklyn	1,716	02/09/2024
441 100th St, Brooklyn	2,296	09/27/2006	$590,000
443 100th St, Brooklyn	2,296	12/19/2023
438 99th St, Brooklyn	1,455	01/22/2024
423 100th St, Brooklyn	3,900	08/02/2021
431 100th St, Brooklyn	1,064	08/28/2014	$785,000
415 100th St, Brooklyn	2,360	11/01/2022
442 99th St, Brooklyn	1,933	05/10/2005	$130,000
419 100th St, Brooklyn	2,360	06/25/2014	$980,000
435 100th St, Brooklyn	2,486	11/08/2018	$560,000
420 99th St, Brooklyn	1,647	05/20/2024
428 99th St, Brooklyn	1,716	10/09/1992
444 99th St, Brooklyn	1,599
427 100th St, Brooklyn	2,396	10/24/2008
445 100th St, Brooklyn	2,296	07/08/2009	$575,000