Google street view image for 18 Mason St, Lexington, MA 02421

OFF MARKET

$1,473,504

•

2.5 ba

•

2,124

sq ft

18 Mason St, Lexington, MA 02421

About this home

18 Mason St is a 2,124 square foot house on a 0.34 acre lot with 5 bedrooms and 2.5 bathrooms. Based on Redfin's Lexington data, we estimate the home's value is $1,473,504.

Single-familyProperty Type

1967Year Built

0.34 acresLot Size

$694Est. Price/Sq.Ft.

Source:Public Records

Redfin Estimate

$1,473,504

$36K since August

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 8.6% lower than the average sale price ($1.61M) of 6 comparable homes.

SOLD JUL 28, 2026
$1,450,000
A
4 beds3 baths2,148 sq ft
42 Peacock Farm Rd, Lexington, MA 02421
SOLD JUL 2, 2026
$1,700,000
B
4 beds2.5 baths2,240 sq ft
3 Compton Cir, Lexington, MA 02421
SOLD AUG 13, 2026
$1,480,000
C
3 beds3 baths2,007 sq ft
241 Worthen Rd E, Lexington, MA 02421
SOLD AUG 31, 2026
$1,433,000
D
4 beds3 baths2,446 sq ft
3 Watson Rd, Lexington, MA 02421
SOLD MAY 8, 2026
$1,970,000
E
4 beds3 baths2,220 sq ft
32 Moon Hill Rd, Lexington, MA 02421
SOLD MAY 15, 2026
$1,645,000
F
4 beds3.5 baths2,510 sq ft
27 Peacock Farm Rd, Lexington, MA 02421

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Earn from this home

Sell

$1,399,477

Est. take-home

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Rent

$4,664/mo

Redfin rental estimate

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Market trends in 02421, MA

Last updated August 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

102.5%

+0.2% MoM

Median sale price

$1.6M

$71K MoM

Avg. days on market

22d

0 days MoM

Recently sold homes

14 MoM

New listings for sale

NEW 4 HRS AGO
$1,198,000
3 beds2 baths1,790 sq ft
22 Harbell St, Lexington, MA 02421
OPEN THU, 4PM TO 6PM
$3,649,000
6 beds5 baths6,390 sq ft
4 Eliot Rd, Lexington, MA 02421
EARLY ACCESS
$1,950,000
4 beds4 baths2,684 sq ft
9 Richard Rd, Lexington, MA 02421
$999,000
2 beds1.5 baths1,209 sq ft
72 Valleyfield St, Lexington, MA 02421
EARLY ACCESS
$1,850,000
5 beds4 baths3,981 sq ft
32 Webster Rd, Lexington, MA 02421
$1,389,000
4 beds3 baths2,392 sq ft
184 Concord Ave, Lexington, MA 02421
OPEN WED, 5PM TO 6PM
$2,850,000
5 beds4 baths5,024 sq ft
209 Waltham St, Lexington, MA 02421
$2,395,000
4 beds4.5 baths4,376 sq ft
171 Lincoln St, Lexington, MA 02421
See all

Provided by Redfin

Sale history for 18 Mason St

As the MLS and public records start to fill up, we'll list the details here.

Year

Property tax

Land + Additions

Assessment*

2026

$16,409 (+3.8%)

$762,000 + $571,000

$1,333,000

2025

$15,801 (+6.2%)

$726,000 + $566,000

$1,292,000

2024

$14,884 (+2.8%)

$692,000 + $523,000

$1,215,000

2023

$14,482 (+9.1%)

$629,000 + $485,000

$1,114,000

2022

$13,276 (−0.2%)

$572,000 + $390,000

$962,000

2021

$13,296 (+0.8%)

$544,000 + $380,000

$924,000

2020

$13,193 (+3.9%)

$544,000 + $395,000

$939,000

2019

$12,694 (+2.5%)

$518,000 + $381,000

$899,000

2018

$12,384 (+4.7%)

$494,000 + $372,000

$866,000

2017

$11,824 (+3.6%)

$465,000 + $351,000

$816,000

2016

$11,417 (+11.5%)

$443,000 + $339,000

$782,000

2014

$10,237 (+4.7%)

$363,000 + $297,000

$660,000

2013

$9,774 (+4.0%)

$351,000 + $292,000

$643,000

2012

$9,401 (+1.1%)

$344,000 + $284,000

$628,000

2011

$9,302 (+3.9%)

$351,000 + $295,000

$646,000

2010

$8,954 (+2.7%)

$351,000 + $295,000

$646,000

2009

$8,716

$370,000 + $302,000

$672,000

Tax history for 18 Mason St

Year

Property tax

Land + Additions

Assessment*

2026

$16,409 (+3.8%)

$762,000 + $571,000

$1,333,000

2025

$15,801 (+6.2%)

$726,000 + $566,000

$1,292,000

2024

$14,884 (+2.8%)

$692,000 + $523,000

$1,215,000

2023

$14,482 (+9.1%)

$629,000 + $485,000

$1,114,000

2022

$13,276 (−0.2%)

$572,000 + $390,000

$962,000

2021

$13,296 (+0.8%)

$544,000 + $380,000

$924,000

2020

$13,193 (+3.9%)

$544,000 + $395,000

$939,000

2019

$12,694 (+2.5%)

$518,000 + $381,000

$899,000

2018

$12,384 (+4.7%)

$494,000 + $372,000

$866,000

2017

$11,824 (+3.6%)

$465,000 + $351,000

$816,000

2016

$11,417 (+11.5%)

$443,000 + $339,000

$782,000

2014

$10,237 (+4.7%)

$363,000 + $297,000

$660,000

2013

$9,774 (+4.0%)

$351,000 + $292,000

$643,000

2012

$9,401 (+1.1%)

$344,000 + $284,000

$628,000

2011

$9,302 (+3.9%)

$351,000 + $295,000

$646,000

2010

$8,954 (+2.7%)

$351,000 + $295,000

$646,000

2009

$8,716

$370,000 + $302,000

$672,000

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Property details

Interior

Basement Information
Basement Sq. Ft: 1,326

Bathroom Information
# of Full Baths: 2
# of 1/2 Baths: 1

Heating & Cooling
Heating Type: Forced Hot Water

Fireplace Information
# of Fireplaces: 1
Has Fireplace

Room Information
# of Rooms: 7

Exterior

Exterior Information
Physical Condition: Average
Building Style Type: Contemporary
Exterior Wall: Aluminum/Vinyl
Roof Shape Type: Hip

Property Information
Living Sq. Ft: 2,124
Gross Sq. Ft: 3,847
Ground Floor Sq. Ft: 2,124
# of Units: 1
# of Stories: 1

Parking & Garage Information
Parking Type: Basement Garage
Garage / Carport Type: Basement

Lot Information
# of Buildings: 1
Land Sq. Ft: 14,810
Municipality Name: LEXINGTON
Acres: 0.34
Zoning Code: RS
State Use Description: 1-FAMILY RESIDENCE

Financial

Assessor Information
Assessment Year: 2026

Public facts

Beds: 5
Baths: 2.5
Sq. Ft.: 2,124
Stories: 1.0
Lot Size: 0.34 acres
Style: Single Family Residential
Year Built: 1967
Year Renovated: —
County: Middlesex County
APN: 30044S

Home facts updated by county records on Jul 29, 2026

Around this home

Schools

Bowman Elementary School

Public K-5 • Assigned • 0.6mi

10/10

Jonas Clarke Middle School

Public 6-8 • Assigned • 1.3mi

10/10

Lexington High School

Public 9-12 • Assigned • 2.0mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Local insights from Redfin agents

Lexington continues to be a competitive Seller's market driven by its historic appeal & location. With buildable land exhausted, true inventory growth is very constrained; development mostly replaces existing homes. New zoning laws will eventually...
2 months ago • Lexington
Benjamin Ginsburg
Redfin Premier agent
153 deals
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Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

5/10 Heat Factor

7 days above 96° expected this year, 15 days in 30 years

6/10 Wind Factor

53% chance of strong winds in next 30 years

3/10 Air Factor

2 unhealthy days expected this year, 3 days in 30 years

Provided by First Street

Historical weather

Lexington, MA • 02421

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 9 hours in June and 4.4 hours in December, placing it below the U.S. average for solar exposure.

9 hrs

4.4 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$1.40M – $1.70M

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New listings for sale in 02421

NEW 4 HRS AGO

$1,198,000

3 beds2 baths1,790 sq ft

22 Harbell St, Lexington, MA 02421

OPEN THU, 4PM TO 6PM

$3,649,000

6 beds5 baths6,390 sq ft

4 Eliot Rd, Lexington, MA 02421

EARLY ACCESSCOLDWELL BANKER REALTY COMING SOON

$1,950,000

4 beds4 baths2,684 sq ft

9 Richard Rd, Lexington, MA 02421

$999,000

2 beds1.5 baths1,209 sq ft

72 Valleyfield St, Lexington, MA 02421

EARLY ACCESSCOLDWELL BANKER REALTY COMING SOON

$1,850,000

5 beds4 baths3,981 sq ft

32 Webster Rd, Lexington, MA 02421

$1,389,000

4 beds3 baths2,392 sq ft

184 Concord Ave, Lexington, MA 02421

OPEN WED, 5PM TO 6PM

$2,850,000

5 beds4 baths5,024 sq ft

209 Waltham St, Lexington, MA 02421

$2,395,000

4 beds4.5 baths4,376 sq ft

171 Lincoln St, Lexington, MA 02421

Home values near 18 Mason St

Data from public records.

Address	Redfin Estimate
5 Mason Street, Lexington, MA 4 Beds \| 2 Baths \| 2400 Sq. Ft.	$2,266,571
6 Mason Street, Lexington, MA 5 Beds \| 2 Baths \| 1580 Sq. Ft.	$1,343,314

Address	Redfin Estimate
7 Mason Street, Lexington, MA 5 Beds \| 3 Baths \| 1350 Sq. Ft.	$1,620,062
8 Mason Street, Lexington, MA 5 Beds \| 2.5 Baths \| 1898 Sq. Ft.	$1,554,220

Address	Redfin Estimate
9 Mason Street, Lexington, MA 5 Beds \| 2 Baths \| 2172 Sq. Ft.	$1,440,014
24 Mason Street, Lexington, MA 5 Beds \| 3 Baths \| 1326 Sq. Ft.	$1,376,167

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GreatSchools Ratings provided by GreatSchools.org.

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About this home

Redfin Estimate

Earn from this home

Market trends in 02421, MA

Sale history for 18 Mason St

Tax history for 18 Mason St

Property details

Around this home

Schools

Lifestyle

Local insights from Redfin agents

Climate risks

Historical weather

Sun exposure

Nearby similar homes

New listings for sale in 02421

Home values near 18 Mason St

More real estate resources