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9 Dekalb Avenue

9 Dekalb Avenue, Brooklyn, NY 11201
418 Units
9 Dekalb Avenue is a condo located in Downtown Brooklyn, Brooklyn. The building was first built in 1908 and is 118 years old. The building is currently considered a landmark so make sure to check it out when you're in the area. The lot that the building was built on is 220 feet wide and 381 feet long. The official lot area is listed as 46,367 square feet. The building itself is 252 feet wide and 70 feet long. In total, 9 Dekalb Avenue has a total floor area of 667,250 square feet. Of that, 529,058 square feet are used for residential purposes. About 138,192 square feet of the building are used for commercial purposes. Additionally, the building has a 18,477 square feet garage. There are a total of 418 units. Of those, 417 are residential units. There are 1 commercial units. 9 Dekalb Avenue has a total of 72 floors.

Interested in learning more about the building? There are many great amenities and features for residents in the building. You can expect to be greeted by a doorman on a daily basis. The same doorman will make sure that your packages are delivered properly and secure! There are 9 closings on record, of which we have matching data for 2 listings. In the past 3 years, a listing in this building will typically remain on the market for about 166 days Meaning, listings tend to sell at a median of $1,623 price per square foot. The transaction that took the longest to complete was unit 53G, listed on Jun 07, 2023 for $1,050,000. This particular unit ultimately sold 176 days later for $1,069,160. The most recent transaction was for unit 53H, sold for $1,350,000 on Jan 29, 2024. Fun fact, the oldest transaction we have on record took place on Jun 28, 2000. See the full transaction history for 9 Dekalb Avenue below.

Downtown Brooklyn, where 9 Dekalb Avenue is located, has a median asking price of $1,575,000 for condo buildings. Meanwhile, the building itself has a median asking price of $1,175,000. For interested buyers, that means the building's median asking price is around 0.25% below the neighborhood's median asking price for condos. Which is great news as a buyer may end up finding some relatively affordable units in this building compared to other condo buildings in the neighborhood.

Unfortunately, there are currently no active listings within the building but our inventory of available units for sale is constantly updating in real time. Check back frequently for updates.

Building Features

Laundry

Washer / Dryer Allowed

Services

Doorman
Concierge

Accessibility

Elevators

Condition

New Construction

Pet Policy

Dogs Allowed / Cats Allowed

Outdoor Space

Roof Deck

25 Past Sales

Date Unit Beds Baths Sqft Price Closed Listed By
20250811 Unit 69F
08/11/2025
69F
1 Bed
1 Bath
823 ft²
$1,460,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
823 ft²
$1,460,000
10/21/2025
Brooklyn Tower Sales Office
Corcoran Sunshine Marketing Group
20250306 Unit 68A
03/06/2025
68A
1 Bed
1 Bath
830 ft²
$1,750,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
830 ft²
$1,662,500 -5.00%
05/09/2025
Alexander Maroni
Douglas Elliman Real Estate
20250306 Unit 57B
03/06/2025
57B
Studio
1 Bath
548 ft²
$1,115,000
bedrooms
Studio
bathrooms
1 Bath
square feet
548 ft²
$1,065,000 -4.48%
04/01/2025
Alexander Maroni
Douglas Elliman Real Estate
20250306 Unit 70B
03/06/2025
70B
1 Bed
1 Bath
700 ft²
$1,505,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
700 ft²
$1,307,662 -13.11%
06/30/2025
Skyler Rhoten
Douglas Elliman Real Estate
20231215 Unit 57D
12/15/2023
57D
1 Bed
1 Bath
880 ft²
$1,465,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
880 ft²
$1,465,000
02/02/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20231113 Unit 58D
11/13/2023
58D
1 Bed
1 Bath
880 ft²
$1,540,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
880 ft²
$1,540,000
01/23/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20231019 Unit 55F
10/19/2023
55F
1 Bed
1 Bath
869 ft²
$1,350,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
869 ft²
$1,350,000
02/02/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20231016 Unit 57E
10/16/2023
57E
1 Bed
1 Bath
810 ft²
$1,510,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
810 ft²
$1,470,000 -2.65%
01/25/2024
Skyler Rhoten
Douglas Elliman Real Estate
20230906 Unit 57F
09/06/2023
57F
3 Bed
4 Bath
1930 ft²
$3,600,000
bedrooms
3 Bed
bathrooms
4 Bath
square feet
1930 ft²
$3,515,000 -2.36%
02/12/2024
Nadia Bartolucci
Prudential Douglas Elliman Real Estate
20230821 Unit 53F
08/21/2023
53F
1 Bed
1 Bath
869 ft²
$1,300,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
869 ft²
$1,300,000
01/23/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20230814 Unit 56D
08/14/2023
56D
1 Bed
1 Bath
880 ft²
$1,950,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
880 ft²
$1,717,000 -11.95%
04/15/2025
Alexander Maroni
Douglas Elliman Real Estate
20230801 Unit 54F
08/01/2023
54F
1 Bed
1 Bath
869 ft²
$1,365,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
869 ft²
$1,325,000 -2.93%
03/04/2024
Skyler Rhoten
Douglas Elliman Real Estate
20230726 Unit 69C
07/26/2023
69C
Studio
1 Bath
592 ft²
$1,205,000
bedrooms
Studio
bathrooms
1 Bath
square feet
592 ft²
$1,100,000 -8.71%
06/27/2025
Skyler Rhoten
Douglas Elliman Real Estate
20230703 Unit 56C
07/03/2023
56C
3 Bed
3 Bath
1651 ft²
$4,000,000
bedrooms
3 Bed
bathrooms
3 Bath
square feet
1651 ft²
$3,725,000 -6.88%
04/15/2025
Glenn Davis
Prudential Douglas Elliman Real Estate
20230607 Unit 53G
06/07/2023
53G
1 Bed
1 Bath
600 ft²
$1,050,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
600 ft²
$1,069,160 +1.82%
11/30/2023
Alexander F Maroni
Douglas Elliman Real Estate
20230323 Unit 54H
03/23/2023
54H
1 Bed
1 Bath
792 ft²
$1,445,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
792 ft²
$1,445,000
03/08/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20230118 Unit 54D
01/18/2023
54D
1 Bed
1 Bath
814 ft²
$1,460,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
814 ft²
$1,390,000 -4.79%
01/24/2024
Skyler Rhoten
Douglas Elliman Real Estate
20220823 Unit 53H
08/23/2022
53H
1 Bed
1 Bath
792 ft²
$1,350,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
792 ft²
$1,350,000
01/29/2024
Skyler Rhoten
Douglas Elliman Real Estate
20220815 Unit 53D
08/15/2022
53D
1 Bed
1 Bath
814 ft²
$1,375,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
814 ft²
$1,375,000
08/15/2022
Glenn Davis
Prudential Douglas Elliman Real Estate
20220815 Unit 55D
08/15/2022
55D
1 Bed
1 Bath
814 ft²
$1,495,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
814 ft²
$1,495,000
01/31/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20220616 Unit 54G
06/16/2022
54G
1 Bed
1 Bath
600 ft²
$1,070,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
600 ft²
$1,070,000
01/24/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20220610 Unit 55G
06/10/2022
55G
1 Bed
1 Bath
600 ft²
$1,070,000
bedrooms
1 Bed
bathrooms
1 Bath
square feet
600 ft²
$1,070,000
02/20/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20220426 Unit 72A
04/26/2022
72A
Studio
1 Bath
440 ft²
$905,000
bedrooms
Studio
bathrooms
1 Bath
square feet
440 ft²
$905,000
03/21/2024
Glenn Davis
Prudential Douglas Elliman Real Estate
20220322 Unit 70A
03/22/2022
70A
Studio
1 Bath
438 ft²
$875,000
bedrooms
Studio
bathrooms
1 Bath
square feet
438 ft²
$875,000
12/15/2023
Nadia Bartolucci
Prudential Douglas Elliman Real Estate
20220314 Unit 55E
03/14/2022
55E
Studio
1 Bath
540 ft²
$980,000
bedrooms
Studio
bathrooms
1 Bath
square feet
540 ft²
$980,000
02/06/2024
Skyler Rhoten
Douglas Elliman Real Estate


Building Info

Overview

    General

  • Year Built: 1908
  • Building Count: 2
  • Floor Count: 72
  • Total Unit Count: 418
  • Residential Unit Count: 417
  • Basement Type: 0

    Dimensions

  • Lot Area Sqft: 46,367
  • Lot Size Depth Feet: 381
  • Lot Size Frontage Feet: 220
  • Building Depth: 70
  • Building Frontage: 252
  • Gross Building Area: 667,250

    Building Floor Area

  • Residential Building Floor Area: 529,058
  • Commercial Building Floor Area: 138,192
  • Garage Building Floor Area: 18,477
  • Retail Building Floor Area: 119,715

    Floor Area Ratio

  • Built Floor Area Ratio: 14
  • Residential Floor Area Ratio: 10
  • Commercial Floor Area Ratio: 12
  • Facilities Floor Area Ratio: 10

Building

  • Building Type: D7
  • Lot Type: 3
  • Land Use: 04
  • Irregular Lot Code: Y
  • Proximity Code: 1
  • Extension Code: N

Neighborhood

  • Community District: 302
  • City Council District: 33
  • Landmark Name: INDIVIDUAL AND INTERIOR LANDMARK
  • Police Precinct: 84
  • Fire Company: E207
  • Health Area: 1100
  • Sanitation District Borough: 3
  • Sanitation Subsection: 1B
  • School District: 13

Zoning

  • Split Boundary Zone Indicator: N
  • Zoning: C6-4.5
  • Special Purpose District 1: DB

Geography

  • Borough Name: BK
  • Borough Code: 3
  • Block: 149
  • Lot: 100
  • Borough Block Lot: 3001490100

    Address

  • Full Address: 340 Flatbush Avenue Ext
  • Zip Code: 11201

Valuation

    Assessments Valuation

  • Assessed Total Value: $19,788,750
  • Assessed Land Value: $5,628,150

    Exemptions

  • Exempt Total Value: $0
Data used for valuation calculations is provided by RealtyHop, and other third party sources

About Northwestern Brooklyn



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Frequently Asked Questions

What neighborhood is 9 Dekalb Avenue located in?
The 9 Dekalb Avenue is a condo located in the neighborhood of Downtown Brooklyn in Northwestern Brooklyn, Brooklyn.
What is the average sales price for listings in 9 Dekalb Avenue?
The average sales price for units in 9 Dekalb Avenue is $1,175,000 , or $1,623/sqft. currently.