NOT LISTED FOR SALE

18 Cowasset Ln Waltham, MA 02451

Waltham Area

Estimated Value: $677,000 - $1,019,000

2 Beds
2 Baths
1,921 Sq Ft
$462/Sq Ft Est. Value

About This Home

This home is located at 18 Cowasset Ln, Waltham, MA 02451 and is currently estimated at $887,189, approximately $461 per square foot. 18 Cowasset Ln is a home located in Middlesex County with nearby schools including Thomas R Plympton Elementary School, John F Kennedy Middle School, and Waltham Sr High School.

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

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

Closed on
Sep 19, 2025
Sold by
Robert G Leblanc 1992 T G and Robert Lane
Bought by
Current Estimated Value
$887,189

Purchase Details

Closed on
Sep 11, 2008
Sold by
Leblanc Robert G
Bought by
Robert G Leblanc T G and Robert Leblanc

Purchase Details

Closed on
Aug 27, 1996
Sold by
Vytal Antoinette Est and Hays
Bought by
Leblanc Robert G
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
-- --
Robert G Leblanc T G -- --
Leblanc Robert G $214,750 --
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
Previous Owner $100,000
Previous Owner Leblanc Tr Robert G $185,000
Previous Owner Leblanc Robert G $156,600
Source: Public Records

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
2025 $7,193 $732,500 $430,000 $302,500
2024 $6,733 $698,400 $430,000 $268,400
2023 $6,561 $635,800 $391,700 $244,100
2022 $6,619 $594,200 $357,600 $236,600
2021 $6,563 $579,800 $357,600 $222,200
2020 $6,381 $534,000 $323,600 $210,400
2019 $6,127 $484,000 $317,300 $166,700
2018 $5,651 $448,100 $293,800 $154,300
2017 $5,307 $422,500 $268,200 $154,300
2016 $4,963 $405,500 $251,200 $154,300
2015 $5,073 $386,400 $238,400 $148,000
Source: Public Records

Map

Massachusetts Middlesex County Waltham 02451

18 Cowasset Ln, Waltham, MA

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.