NOT LISTED FOR SALE

129 Martense St Unit 4A Brooklyn, NY 11226

Flatbush Neighborhood

Estimated Value: $948,763

3 Beds
2 Baths
1,226 Sq Ft
2018 Built

Sale Details

Date Sold: April 9, 2025

Last sale price $770,000 $628 Per Sq Ft

Est. 23% increase in value since last sale

Current estimated payment $6,351 / mo

133 Days on Market

Highlights

  • Rooftop Deck
  • Terrace
  • South Facing Home
  • City View
  • Zoned Cooling

About This Home

As of April 2025

OPEN HOUSE BY APPOINTMENT ONLY

Unit 4A at 129 Martense is a spacious three-bedroom duplex penthouse with a massive private terrace.

Recently constructed, the apartment features designer finishes, split-unit heating and cooling, SMART home features, in-unit washer/dryer, high ceilings, and private outdoor space. The open chef's kitchen has been outfitted with custom gray and white wood cabinetry, white Caesarstone countertops, and a suite of matte-gray GE graphite appliances. The bathrooms have heated floors, frameless glass shower partitions, and spacious vanities with great storage. Large bay windows lend to incredible light, and the entire apartment has Southern exposures. There are oak floors throughout. Unit 4A also comes with a large storage room in the basement.

The 8-unit building offers bike storage and Video Security. It is close to nearby public transportation (B/Q and 2/5 at Church Avenue). Situated on a tree-lined block at the intersection of four dynamic neighborhoods: Prospect Lefferts Gardens, Flatbush, Prospect Park South and Ditmas Park, it is at the hub of the best amenities Brooklyn has to offer. Enjoy the close proximity to acclaimed restaurants, Prospect Park, The Botanic Gardens, and Kings Theatre.

All available for under $1M, this is a fantastic opportunity!

Last Agent to Sell the Property

Margaret Chong

Serhant License #10301217074 Listed on: 09/03/2024

Serhant

Last Buyer's Agent

Carolina Walicki

Real New York License #10401330843

Real New York

Range of Values:

--
Value Increase
--
Percent Increase
--
Adjusted for Inflation
Collateral Analytics

Collateral Analytics Collateral Analytics AVMs (Automated Valuation Model) employ a number of statistical approaches combined with neighborhood-specific comparable selection guarantees the most up-to-date and precise valuations.

Not Available

Collateral Analytics does not have data for the current month. Please view the chart for historical values.

ICE

ICE Mortgage Technology ICE Mortgage Technology’s AVM (Automated Valuation Model) is a state-of-the-art online residential property valuation tool that provides a quick and accurate estimate of the value of almost any home in the U.S.

Not Available

ICE Mortgage Technology does not have data for the current month. Please view the chart for historical values.

First American

First American First American Data & Analytics’ next-generation AVM combines unrivaled data assets with a blended ensemble of valuation models to produce highly accurate, reliable valuations you can trust.

Not Available

First American does not have data for the current month. Please view the chart for historical values.

Quantarium

Quantarium Quantarium’s valuation service, repeatedly proven the industry’s most accurate and comprehensive, is supercharged with a self-learning and auto-tuning AI engine that continually becomes smarter and more accurate as it processes daily inputs from the industry’s leading RE data lake.

Not Available

Quantarium does not have data for the current month. Please view the chart for historical values.

Average Value
Not Available
List Price
Sold Price
Create a Home Valuation Report for This Property
The Home Valuation Report is an in-depth analysis detailing your home's value as well as a comparison with similar homes in the area

Property Details

Home Type

  • Condominium

Year Built

  • Built in 2018

HOA Fees

  • $778 Monthly HOA Fees

Home Design

  • Entry on the 4th floor

Interior Spaces

  • 1,226 Sq Ft Home
  • 4-Story Property
  • City Views

Bedrooms and Bathrooms

  • 3 Bedrooms
  • 2 Full Bathrooms

Laundry

  • Laundry in unit
  • Washer Hookup

Additional Features

  • Terrace
  • South Facing Home
  • Zoned Cooling

Listing and Financial Details

  • Legal Lot and Block 1207 / 01824

Community Details

Overview

  • 8 Units
  • Flatbush Subdivision

Amenities

  • Rooftop Deck

Property Details

Home Type

Condominium

Year Built

Built in 2018

Lot Details

0 Sq Ft Lot

HOA Fees

$778 per month

Listing Details

  • Exposures: South
  • Property SubType: Apartment
  • Property Type: Residential
  • Neighborhood: Flatbush
  • Architectural Style: Walk-Up
  • Entry Level: 4
  • CustomProperty: { "WeeklyRate": null, "OffMarketDate": "2025-04-09", "LivingAreaRange": null, "GuestHouseYN": null, "Lang2_Type": null, "AboveGradeUnfinishedAreaRange": null, "GuestHouseAreaTotalUnits": null, "PrivateShowingInstructions": null, "NumberOfBoatSlips": null, "LotSizeRangeUnits": null, "LakeId": null, "BuildingAreaTotalRange": null, "HumanModifiedYN": false, "MineralRights": null, "LotSizeRangeSource": null, "Permission": null, "Membership": null, "ModificationTimestamp": "2026-08-05T17:27:49.690-00:00", "Restrictions": null, "BoatDockSlipFeatures": null, "OffersReviewDate": null, "AdditionalFeeFrequency": null, "PotentialShortSale": null, "TitleCompanyPhone": null, "LeaseAmountPerAreaUnit": null, "AssociationFeeTotal": null, "PropertyAccess": null, "AdditionalFee": null, "LakeSize": null, "LivingAreaRangeHigh": null, "LotSizeAreaRangeLow": null, "GarageArea": null, "BelowGradeFinishedAreaRange": null, "BuildingAreaTotalRangeSource": null, "GarageAreaUnits": null, "AdditionalFeeYN": false, "LakeChainName": null, "BelowGradeFinishedAreaRangeUnits": null, "DevelopmentName": null, "TaxAuthority": null, "ProjectName": null, "WaterAccessYN": null, "AssociationFeeTotalFrequency": null, "ListOfficeMlsId": "10325", "GarageDimensions": null, "BelowGradeBedrooms": null, "MembershipRequiredYN": null, "AboveGradeBedrooms": null, "GulfAccessYN": null, "TaxAssessedValueImprovement": null, "AboveGradeUnfinishedAreaRangeSource": null, "OtherExpenseDescription": null, "MembershipFeeFrequency": null, "ListingKeyNumeric": 1091335487, "AdditionalInfo3": null, "BoatDockSlipDescription": null, "AdditionalInfo1": null, "PublicRemarks_lang2": null, "AdditionalInfo2": null, "PublicRemarks_lang3": null, "SourceFloorPlansCount": null, "LastMonthRentReqYN": null, "AboveGradeUnfinishedAreaRangeUnits": null, "ListAOR": null, "ThirdPartyIntegrationType": null, "BuildingAreaTotalRangeUnits": null, "PricePerAreaUnit": null, "FractionalShare": "0.00", "TitleCompanyName": null, "AboveGradeFinishedAreaRangeSource": null, "BelowGradeFinishedAreaRangeSource": null, "OriginatingSystemKey": "16464379", "GuestHouseAreaTotalSource": null, "LeaseTermsDescription": null, "PropertyType": "Residential", "LivingAreaRangeUnits": null, "OriginatingSystemName": "RLS", "BelowGradeUnfinishedAreaRangeSource": null, "LandTenure": null, "OffSeasonRate": null, "Attic": null, "MembershipFee": null, "BoatDockAccommodates": null, "PropertySubTypeAdditional": "Apartment", "PricePerArea": null, "BoatDockYN": null, "BonusAmount": null, "GuestHouseAreaTotal": null, "ListingKey": "1091335487", "GuestHouseDescription": null, "SecurityDepositYN": null, "SourceSupplementPublicCount": null, "SaleOrLeaseIncludes": null, "AdditionalFeeDescription": null, "InternetEntireListingDisplayYN": true, "SeasonRate": null, "ComplexName": null, "StoriesPartial": null, "CustomFields": "{\n \"ElevatorsTotal\": \"0\",\n \"PercentOfCommonElements\": \"0.00\",\n \"KitchenCondition\": \"Excellent\",\n \"FlipTaxRemarks\": \"--NO--\",\n \"FlipTax\": \"0.00\",\n \"LandmarkStatusYN\": \"0\",\n \"CapitalReservesYN\": \"0\",\n \"BuildingTaxLot\": \"0016\",\n \"MaximumFinancingRemarks\": \"90\",\n \"PrivateOutdoorSpaceSize\": \"LessThan60SqFt\",\n \"ViewRemarks\": \"C,F\",\n \"BathroomCondition\": \"Excellent\",\n \"BuyerAgentRLSParticipantYN\": \"1\",\n \"SponsorUnitYN\": \"0\",\n \"TaxDeductionPercent\": \"0.00\",\n \"CertificateOfOccupancyYN\": \"1\",\n \"TaxMonthlyAmount\": \"201.00\",\n \"TaxAbatementYN\": \"0\",\n \"AttendanceType\": \"None\",\n \"MaximumFinancingPercent\": \"90.00\",\n \"ListingKey\": \"1091335487\"\n}", "BoatDockHeight": null, "AvailabilityType": null, "LakeName": null, "OriginatingSystemSubName": "RLS_REBNY", "RiverName": null, "BelowGradeUnfinishedAreaRangeUnits": null, "ListOfficeKey": "5658994", "TaxYearRange": null, "NumberOfBoatDocks": null, "LotSizeAreaRangeHigh": null, "TaxAssessedValueLand": null, "StandardStatus": "Closed", "GulfAccessType": null, "BoatSlipYN": null, "StormProtection": null, "LivingAreaRangeSource": null, "LeaseAmountPerArea": null, "TitleCompanyAddress": null, "MonthlyRate": null, "WaterAccessDescription": null, "SecurityDepositDescription": null, "TaxRate": null, "BelowGradeUnfinishedAreaRange": null, "MembershipDescription": null, "TitleCompanyPreferred": null, "AboveGradeFinishedAreaRangeUnits": null, "AboveGradeFinishedAreaRange": null, "LivingAreaRangeLow": null, "BuildingSizeDimensions": null, "PropertySubType": "Apartment", "UnitLocation": "4", "ConsumerRemarks": null, "LotSizeRange": null, "OffersDescription": null, "Lang3_Type": null, "StoriesPartialTotal": null, "Location": null, "ListingId": null, "RentSpreeYN": null, "RentSpreeURL": null, "ApplicationFee": null, "CommunityDevelopmentDistrictYN": null, "SourceSystemKey": null }
  • Special Features: VirtualTour
  • Property Sub Type: Condos
  • Stories: 4

Interior Features

  • Fireplace: No
  • Living Area: 1226.0
  • Living Area Units: Square Feet
  • Basement: No
  • Basement: Other

Beds/Baths

  • Full Bathrooms: 2
  • Bathrooms Integer: 2
  • Bedrooms: 3

Exterior Features

  • View: City
  • View: Yes
  • Exterior Features: Building Roof Deck, Private Outdoor Space Under 60 Sqft
  • Patio/Porch Features: Terrace

Garage/Parking

  • Garage: No

Utilities

  • Laundry Features: Building Other, Washer Hookup, In Unit
  • Cooling: Zoned
  • Cooling: No

Condo/Co-op/Association

  • Common Charge/Maintenance Fee: 778.0
  • Common Charge/Maintenance Fee Frequency: Monthly
  • Common Interest: Condominium

Lot Info

  • Zoning Description: R7-1

Rental Info

  • Land Lease: No

Building Info

  • New Construction: No
  • Units: 8
  • Total Stories: 4
  • Year Built: 2018

Tax Info

  • Tax Block: 01824
  • Tax Lot: 1207

Ownership History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Name Owned For Owner Type

Purchase Details

Listed on
Sep 3, 2024
Closed on
Apr 9, 2025
Sold by
Japan Four Llc
Bought by
Seller's Agent
Margaret Chong
Serhant
Buyer's Agent
Carolina Walicki
Real New York
List Price
$885,000
Sold Price
$770,000
Premium/Discount to List
-$115,000
-12.99%
Views
162
Current Estimated Value
$948,763

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Estimated Appreciation
$178,763
Avg. Annual Appreciation
15.49%
Original Mortgage
$300,000
Outstanding Balance
$295,606
Interest Rate
6.65%
Mortgage Type
New Conventional
Estimated Equity
$653,157

Purchase Details

Listed on
May 22, 2019
Closed on
May 16, 2019
Sold by
129 Martense Llc
Bought by
Japan Four Llc
Seller's Agent
Margaret Chong
Serhant
Sold Price
$3,500

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Avg. Annual Appreciation
0.00%
Original Mortgage
$539,000
Interest Rate
4%
Mortgage Type
Unknown
Source: Public Records

Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

Agents Specializing in Flatbush, NY

  • Olga Moldavsky Real Estate Agent - REMAX EDGE

    Olga Moldavsky

    REMAX EDGE

    (888) 477-2209

    139 Total Sales

    2 in Flatbush

    $1,375,000 Price Range

    Olga Moldavsky
     Section Image
  • Joanna Mayfield Marks Real Estate Agent - Brown Harris Stevens Brooklyn LLC

    Joanna Mayfield Marks

    Brown Harris Stevens Brooklyn LLC

    (929) 552-6159

    80 Total Sales

    2 in Flatbush

    $400K - $1.7M Price Range

    Joanna Mayfield Marks
     Section Image
  • Donald Brennan Real Estate Agent - Brennan Realty Services LLC

    Donald Brennan

    Brennan Realty Services LLC

    (973) 649-9527

    12 Total Sales

    1 in Flatbush

    $1,450,000 Price

    Donald Brennan
     Section Image
  • Dan Patsis Real Estate Agent - POLJAN PROPERTIES INC

    Dan Patsis

    Responds Quickly

    POLJAN PROPERTIES INC

    (917) 525-4631

    68 Total Sales

    3 in Flatbush

    $337K - $613K Price Range

    Dan Patsis
     Section Image
  • Lisa James Real Estate Agent - Corcoran Group

    Lisa James

    Corcoran Group

    (551) 888-3217

    25 Total Sales

    3 in Flatbush

    $189K - $1.7M Price Range

    Lisa James
     Section Image
  • David Castle Real Estate Agent - Keller Williams Realty Greater

    David Castle

    Keller Williams Realty Greater

    (888) 961-6134

    24 Total Sales

    1 in Flatbush

    $750,000 Price

    David Castle
     Section Image
See All Agents

Purchase History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Buyer Sale Price Title Company
$770,000 Langdon Title Agency
Japan Four Llc $770,000 --
Source: Public Records

Mortgage History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Status Borrower Loan Amount
Open $300,000
Previous Owner Japan Four Llc $539,000
Source: Public Records

Property History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Date Event Price List to Sale Price per Sq Ft Prior Sale
04/09/2025 04/09/25 Sold $770,000 -3.6% $628 / Sq Ft
01/14/2025 01/14/25 Pending -- -- --
10/07/2024 10/07/24 Price Changed $799,000 -9.7% $652 / Sq Ft
09/03/2024 09/03/24 For Sale $885,000 0.0% $722 / Sq Ft
05/22/2019 05/22/19 For Rent $3,795 -99.5% --
05/22/2019 05/22/19 Rented -- -- --
05/16/2019 05/16/19 Sold $770,000 -22.9% $628 / Sq Ft View Prior Sale
04/16/2019 04/16/19 Pending -- -- --
11/26/2018 11/26/18 For Sale $999,000 -- $815 / Sq Ft
Source: Real Estate Board of New York (REBNY)

Tax History

We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.

Year Tax Paid Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. Land Improvement
2026 $2,602 $173,558 $22,529 $151,029
2025 $2,410 $148,863 $22,529 $126,334
2024 $2,410 $125,901 $22,529 $103,372
2023 $2,189 $116,890 $22,529 $94,361
2022 $2,189 $107,965 $22,529 $85,436
2021 $2,123 $107,988 $22,529 $85,459
2020 $2,031 $114,637 $22,529 $92,108
2019 $1,901 $106,838 $22,529 $84,309
Source: Public Records

Agents Affiliated with this Home

  • Margaret Chong Real Estate Agent - Serhant

    Seller's Agent in 2025

    Margaret Chong

    Serhant

    (405) 209-4698

    2 in this area

    31 Total Sales

    Margaret Chong
    Section Image
  • Carolina Walicki Real Estate Agent - Real NY

    Buyer's Agent in 2025

    Carolina Walicki

    Real NY

    (617) 905-1214

    1 in this area

    14 Total Sales

    Carolina Walicki
    Section Image
  • Deborah Rieders Real Estate Agent - Corcoran Group

    Seller's Agent in 2019

    Deborah Rieders

    Corcoran Group

    (718) 923-8001

    28 in this area

    442 Total Sales

    Deborah Rieders
    Section Image
  • Raquel Lomonico Real Estate Agent - Serhant

    Seller Co-Listing Agent in 2019

    Raquel Lomonico

    Serhant

    (561) 568-0297

    125 Total Sales

    Raquel Lomonico
    Section Image
  • Albi Zhubi Real Estate Agent - Corcoran Group

    Seller Co-Listing Agent in 2019

    Albi Zhubi

    Corcoran Group

    (847) 409-7350

    14 in this area

    246 Total Sales

    Albi Zhubi
    Section Image
See All Agents

Map

Source: Real Estate Board of New York (REBNY)

MLS Number: RLS11006052

Real Estate Board of New York (REBNY)

APN: 05087-1207

New York Kings County Brooklyn 11226 Flatbush

129 Martense St Unit 4A, Brooklyn, NY

Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.

Real Estate Board of New York (REBNY) This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. ©2026 The Real Estate Board of New York, Inc., All rights reserved.

RLS Data display by Homes.com LLC

Nearby Homes
Your Personal Tour Guide

Ask me questions while you tour the home.