Westchester County » 10543 » Jefferson Ave » 434 Jefferson Ave

434 Jefferson Avenue, Mamaroneck, NY 10543 Property Information

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Address

Primary address	434 Jefferson Avenue, Mamaroneck
Zip code	10543
County	Westchester

Municipality	Rye
Parcel ID	154.34-1-62

Sales & Tax Overview for 434 Jefferson Avenue, Mamaroneck

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

Current property tax	$14,405

Lot & Building Information for 434 Jefferson Avenue, Mamaroneck

Building sqft	1,684
Building class	One Family Year-Round Residence (210)
Acreage	0.11
Lot dimensions	50 ft X 100 ft
Frontage	50
Depth	100
Year built	1892
Stories	2
Rooms	6
Bedrooms	3
Bathrooms	1
Kitchen	1
Water supply	Comm/public
Sewer	Comm/public

Style	Old style
Condition	4
Basement	4
Attic	130
Exterior wall	Stucco
Heating type	Hot air
Heating fuel	Gas
First story sqft	Register
Second story sqft	Register

Zoning, Use & Area Overview

Walk Score

Transit Score

Bike Score

Zoning district	Register
School district	Rye Neck

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

Other Property Data for 434 Jefferson Avenue, Mamaroneck

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About 434 Jefferson Avenue, Mamaroneck

What is the year built & the total sq. ft. for 434 Jefferson Avenue, Mamaroneck, NY 10543?

434 Jefferson Avenue, Mamaroneck, NY 10543 was built in 1892 and has a total of 1,684 square feet.

What is the assessed value of 434 Jefferson Avenue, Mamaroneck, NY 10543 and the property tax paid?

Assessed at $684,500, the tax amount paid for 434 Jefferson Avenue, Mamaroneck, NY 10543 is $14,790.

Ownership Information

View detailed property contacts like owners, building management, representatives from permits and tenants with a free account.

Commercial Real Estate nearby

Real Estate Reports:

Lucian Alixandrescu, Jul 28, 2026 Brooklyn Emerges as NYC’s Coworking Growth Engine, Manhattan Rents Cross $100 in the Plaza District

New York City’s office market continued to lead the U.S. in Q2, but internal shifts were most visible in the flex office market. Brooklyn’s coworking inventory grew 6.2% Q-o-Q even as Manhattan’s supply retreated. At the same time, Brooklyn’s asking rents for traditional office leases climbed more than twice as fast as the national average.

Eliza Theiss, Jul 22, 2026 Prices Rise in 32 of NYC’s Leading Neighborhoods as City and Manhattan Hit Record Highs

Q2 2026 saw NYC and Manhattan reach historic highs, with Brooklyn and Queens marking close to new records as well. Meanwhile, Hudson Yards remained at the top, Central Midtown posted its highest price ever and Carroll Gardens marked its third consecutive quarter over $2 million

Laura Pop-Badiu, Jul 15, 2026 How to Find Property Owners — The Complete Guide

For real estate professionals looking for the best ways to find property owners — whether through free methods based on public sources or paid tools with verified, in-depth data — this comprehensive guide breaks down every step of the due diligence process.

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Past Sales & Property History for 434 Jefferson Avenue, Mamaroneck

Create a free account to view the complete sales history for 434 Jefferson Avenue, Mamaroneck, including title documents, transfer conditions, mortgages and liens.

No recorded sales for this property.

More about Westchester County Property Records

Title Documents for 434 Jefferson Avenue, Mamaroneck

Data not available for this property.

Property Taxes for 434 Jefferson Avenue, Mamaroneck

Access detailed property tax data for 434 Jefferson Avenue, Mamaroneck, NY 10543. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.

Tax year	2025
Base tax	$14,791
Current property tax	$14,405
Market value	$684,500
Assessed value	$684,500

More about Westchester County Property Taxes

Assessment History for 434 Jefferson Avenue, Mamaroneck

Here's the assessment & property tax history for 434 Jefferson Avenue, Mamaroneck, including the evolution of the total tax rate and corresponding property tax.

Year	Market value	Assessment value	Total tax rate	Property tax	Year over year change
2025	$684,500	$684,500	21.6079	$14,791	+6.91%
2024	$645,700	$645,700	21.4249	$13,834	-3.19%
2023	$633,000	$633,000	22.5745	$14,290	+2.74%
2022	$597,200	$597,200	23.2904	$13,909	+1.43%
2021	$547,900	$547,900	25.0283	$13,713	-5.48%

Mamaroneck residential market stats

Median Sale Price

$1,060,000

-35.1% YoY

Median Price/Sqft

$534

-14.4% YoY

Westchester County Median Sale Price

$850,000

4.9% YoY

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

Risk

Create a free account to unlock extended information for 434 Jefferson Avenue, Mamaroneck, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).

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

Transportation

Access the detailed traffic volume map for 434 Jefferson Avenue, Mamaroneck to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.

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Schools

Nearest elementary schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
Mamaroneck Avenue School	6	Public	K-5	684	0.26
F E Bellows Elementary School	8	Public	3-5	347	0.48
French-American School of New York	NR	Private	PK-12	765	0.50
French-American School of New York	NR	Private	PK-12	765	0.50
Daniel Warren Elementary School	NR	Public	K-2	320	0.68

Nearest middle schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
French-American School of New York	NR	Private	PK-12	765	0.50
Rye Neck Middle School	7	Public	6-8	351	0.98
Westchester Day School	NR	Private	PK, K-8	379	1.56
Ss John & Paul School	NR	Private	PK-8	349	1.60
Hommocks School	7	Public	6-8	1,258	1.70

Nearest high schools

Name	Rating	Type	Grade range	No of students	Distance (miles)
French-American School of New York	NR	Private	PK-12	765	0.50
Rye Neck Senior High School	9	Public	9-12	515	0.98
Mamaroneck High School	8	Public	9-12	1,660	1.21
Westchester Hebrew High School	NR	Private	9-12	87	1.56
Harrison High School	9	Public	9-12	1,064	1.70

Neighbors for 434 Jefferson Avenue, Mamaroneck

Here are the neighbors for 434 Jefferson Avenue, Mamaroneck.

Address	Square feet	Purchase date	Purchase price
614 Hillside Ave, Mamaroneck	3,094	04/26/2022
531 Hillside Ave, Mamaroneck	2,498	01/23/2020
527 Grade St, Mamaroneck	1,314
600 Hillside Ave, Mamaroneck	2,120	04/03/2025	$1
527 Jefferson Ave, Mamaroneck	1,864	02/06/2015	$400,000
430 Jefferson Ave, Mamaroneck	1,272	12/18/2003	$465,012
403 Jefferson Ave, Mamaroneck	1,523
543 Halstead Ave, Mamaroneck	1,501	07/01/2024
515 Jefferson Ave, Mamaroneck	1,786	07/01/2024	$10
620 Hillside Ave, Mamaroneck	3,182	12/21/2009
521 Jefferson Ave, Mamaroneck	2,045	08/27/2025	$950,000
1512 Pine Knoll Ln, Mamaroneck	2,572	12/19/1997	$250,000
426 Jefferson Ave, Mamaroneck	1,103	04/26/2022
529 Grade St, Mamaroneck	1,503	03/30/1998	$200,000
1519 Pine Knoll Ln, Mamaroneck	1,734	05/27/2022	$800,000
531 Jefferson Ave, Mamaroneck	2,432	08/02/2018
511 Jefferson Ave, Mamaroneck	1,782	07/01/2024	$10
535 Jefferson Ave, Mamaroneck	2,051	08/17/2018
422 Jefferson Ave, Mamaroneck	2,212	07/01/2024
415 Jefferson Ave, Mamaroneck	2,128

Nearby ZIP Codes for 434 Jefferson Avenue, Mamaroneck

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