NOT LISTED FOR SALE

423 Union Ave Unit 1 Mamaroneck, NY 10543

Estimated Value: $901,460 - $1,003,000

3 Beds
1 Bath
2,168 Sq Ft
$435/Sq Ft Est. Value

About This Home

This home is located at 423 Union Ave Unit 1, Mamaroneck, NY 10543 and is currently estimated at $943,615, approximately $435 per square foot. 423 Union Ave Unit 1 is a home located in Westchester County with nearby schools including F.E. Bellows Elementary School, Daniel Warren Elementary School, and Rye Neck Middle School.

Ownership History

Date Name Owned For Owner Type

Purchase Details

Closed on
Jul 3, 2025
Sold by
Ramirez Carlos
Bought by
423 Union Ave Llc
Current Estimated Value
$974,465

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$712,500
Outstanding Balance
$708,839
Interest Rate
6.85%
Mortgage Type
New Conventional
Estimated Equity
$234,776

Purchase Details

Closed on
Jul 21, 2017
Sold by
Guerrero Maria
Bought by
Ramirez Carlos

Home Financials for this Owner

Home Financials are based on the most recent Mortgage that was taken out on this home.
Original Mortgage
$337,500
Interest Rate
3.9%
Mortgage Type
New Conventional

Purchase Details

Closed on
Dec 1, 2015
Sold by
Guerrero Mario and Guerrero Maria
Bought by
Guerrero Maria

Purchase Details

Closed on
Aug 28, 1997
Sold by
Garcia Elida
Bought by
Guerrero Mario and Guerrero Maria
Source: Public Records

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

Home Values in the Area

Source: Public Records

Average Home Value in this Area

Source: Public Records

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
423 Union Ave Llc $950,000 Stewart Title Insurance Compan
Ramirez Carlos $450,000 None Available
Guerrero Maria -- Attorney
Guerrero Mario $280,000 --
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 423 Union Ave Llc $712,500
Previous Owner Ramirez Carlos $337,500
Source: Public Records

Tax History

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
2025 $14,774 $1,024,700 $443,000 $581,700
2024 $19,682 $826,300 $443,000 $383,300
2023 $14,319 $794,500 $421,900 $372,600
2022 $14,135 $756,700 $421,900 $334,800
2021 $18,493 $694,200 $421,900 $272,300
2020 $16,416 $694,200 $421,900 $272,300
2019 $17,638 $601,500 $335,300 $266,200
2018 $10,740 $565,900 $328,900 $237,000
2017 $2,334 $585,300 $325,800 $259,500
2016 $17,370 $557,200 $271,500 $285,700
2015 -- $589,600 $304,500 $285,100
2014 -- $470,800 $263,900 $206,900
2013 -- $462,000 $255,100 $206,900
Source: Public Records

Map

New York Westchester County Mamaroneck 10543

423 Union Ave Unit 1, Mamaroneck, 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.

Nearby Homes
Your Personal Tour Guide

Ask me questions while you tour the home.