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21 Stone Ave # 21, Somerville MA 02143

Somerville, MA 02143 • Union Square
$849,000
Est. $5,097/month
2
Beds
1
Baths
1,021
Sq Ft
$832
Price/Sq Ft
1900
Year Built
Condominium
Type
6 hours 15 minutes
Time on Market
Active Open House Listed Apr 13, 2026 • MLS# 73500433 Copied!

About this home

A rare opportunity to own a home just steps from Union Square, one of Somerville’s most vibrant and historic destinations, located only a quarter mile from the Green Line station. Nestled on a quiet side street at the base of Prospect Hill, where the first American flag was raised in 1776, 21 Stone combines neighborhood charm with urban convenience. From the private entry, you’re welcomed into an open light-filled living and dining space, where tall ceilings and large windows set a warm, inviting tone. The kitchen is both stylish and functional, with a southeast facing breakfast nook that captures the morning light. Additional perks include private laundry and storage in the basement, an off-street parking space, and shared patio ideal for outdoor gatherings. With award winning restaurants, cafés, and markets just around the corner, this home offers modern comfort rooted in the rich history and energy of Union Square.

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Property Overview

Property Type
Condominium
Listing Type
For Sale
Year Built
1900
Bedrooms
2
Full Bathrooms
1
Living Area
1,021 sq ft
Total Rooms
5
Stories
1
Entry Level
1

Open House Schedule

19
Apr
Sunday, April 19
11:30 AM - 1:00 PM EDT
18
Apr
Saturday, April 18
11:00 AM - 12:30 PM EDT

Facts & Features

Home Facts

Type Residential
Style Condominium
Year Built 1900
Living Area 1,021 sq ft
Bedrooms 2
Full Baths 1
Total Rooms 5

Interior

Heating Baseboard, Steam, Natural Gas
Cooling Window Unit(s)
Flooring Hardwood
Appliances Range, Dishwasher, Refrigerator, Freezer, Washer, Dryer
Fireplace None
Basement N
Laundry In Building
Features None

Exterior

Construction Frame
Architecture None
Roof Shingle
Features Patio
Pool None
Spa None
Fencing None
Patio/Porch Patio

Parking

Features Off Street, Deeded
Total Spaces 1

Utilities

Electric None
Water Public
Sewer Public Sewer
Gas None
Other None

Financial

Annual Tax $4,245
Assessed Value $793,400

Interior Features

Flooring: Hardwood
Appliances: Range, Dishwasher, Refrigerator, Freezer, Washer, Dryer
Interior Features:
Windows:
Basement: N
Laundry: In Building
Security:

Construction & Materials

Year Built: 1900
Structure Type: 2/3 Family
Exterior Materials: Frame
Roof: Shingle
Foundation:
Stories: 1

Heating, Cooling & Utilities

Heating: Baseboard, Steam, Natural Gas
Heating Zones: 1
Cooling: Window Unit(s)
Hot Water:
Water Source: Public
Sewer: Public Sewer
Energy Features:

Exterior & Lot

Exterior Features: Patio
Patio & Porch: Patio
Fencing:
Other Structures:
Lot Features:
Road Surface:

Parking & Garage

Total Parking Spaces: 1
Parking Features: Off Street, Deeded

Location

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Neighborhood

Union Square

21 Stone Ave # 21, Somerville MA 02143

Somerville, MA 02143

Walkability

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Nearby Schools

School District
Somerville School District local
B-
✓ School Safety 2024-25
2.5% Average
1.4% Suspensions 2.2% In-School 1.1% Emergency
↓ 3.0% below state avg
E

Elementary Schools

9 schools
B+
Albert F. Argenziano School at Lincoln Park
0.2 mi | #134 of 352 | Score: 45.7
Improved 40 spots from last year
-12.6 below state avg
553 students Diverse
Rising School Diverse Student Body
Grades PK-08
C+
East Somerville Community School
0.6 mi | #245 of 352 | Score: 37.0
Improved 6 spots from last year
-21.2 below state avg
747 students Diverse
Grades PK-08
C-
Winter Hill Community School
0.6 mi | #287 of 352 | Score: 32.6
Dropped 15 spots from last year
-25.7 below state avg
388 students Diverse
Diverse Student Body
Grades PK-08
St. Theresa of the Child Jesus School
0.8 mi
Grades PK-08
C+
Arthur D Healey School
1.2 mi | #236 of 352 | Score: 37.5
Improved 27 spots from last year
-20.7 below state avg
482 students Diverse
Rising School Diverse Student Body
Grades PK-08
A
John F Kennedy School
1.2 mi | #50 of 352 | Score: 56.7
Improved 5 spots from last year
-1.5 below state avg
439 students Diverse
Grades PK-08
Capuano Early Childhood Center
0.5 mi
250 students Very Diverse
Diverse Student Body
Grades PK-01
A+
Benjamin G Brown School
1.5 mi | #78 of 824 | Score: 60.5
Dropped 61 spots from last year
+2.3 above state avg
219 students Diverse
Strong Attendance
Grades K-05
Tufts Educational Day Care Center
2.0 mi
Grades PK-K
M

Middle Schools

1 school
Next Wave Junior High School
0.5 mi
16 students Diverse
Diverse Student Body
Grades 06-08
H

High Schools

2 schools
F
Full Circle High School
0.5 mi | #344 of 346 | Score: 17.3
Improved 22 spots from last year
-40.9 below state avg
67 students Diverse
Rising School Career Tech Programs College Ready Curriculum Diverse Student Body
Grades 09-12
B+
Somerville High School
0.5 mi | #131 of 346 | Score: 57.1
Improved 111 spots from last year
-1.1 below state avg
1,394 students Diverse
17 sports • 1,566 athletes
Rising School Career Tech Programs Strong Athletics Diverse Student Body
Grades 09-12
Learn about these ratings
School data provided by BMN Schools

Monthly Payment Calculator

Monthly Payment
$0
Principal, interest, taxes & insurance
Loan Amount
$0
After down payment
Total Interest
$0
Over life of loan
Total Cost
$0
Including down payment
%
Down: $0
%

Monthly Payment Breakdown

Principal & Interest $0
Property Tax $354
Homeowners Insurance $200
HOA Fee $250/mo
PMI (if <20% down) $0

Loan Summary

Total of 360 payments $0
Total principal paid $0
Total interest paid $0

Rate Impact

-0.5% Rate
$0/mo
Save $0/mo
Current Rate
$0/mo
+0.5% Rate
$0/mo
Cost $0/mo

Payment Over Time

Interest
Principal
Year 1
95% Interest
Year 15
50/50
Year 30
95% Principal
* Estimates only. Actual payments may vary. Consult with a lender for accurate figures.

Property History

Market Insights

0.1%
Price Range
1
Previous Sales

Property Timeline

🏠
Listed for Sale
Apr 13, 2026
$849,000
Original listing
Agent: The Moving Greater Boston Team Office: Berkshire Hathaway HomeServices Warren Residential
Previous Transaction - MLS #72976387
Full transaction history available when tracking began
🏷️
Previously Sold
Jun 8, 2022
$850,000
MLS #72976387
View Listing →

Price & Status History

Date Event Price Change
Apr 13, 2026 New Listing Added $849,000 —
Jun 8, 2022 Sold $850,000 —

Market Statistics

Time on Market
6 hours 15 minutes
Price per Sq Ft
$832

Tax History

Year Taxes Assessment
2025 $4,245 $793,400

Financial Details

Annual Property Tax
$4,245
Tax Year 2025
HOA Fee
$250
Monthly
Assessed Value
$793,400

Listing Information

Listing Agent The Moving Greater Boston Team
Listing Office Berkshire Hathaway HomeServices Warren Residential
Agent MLS ID TM333652
Office MLS ID AN2213
Listing Data Updated Apr 13, 2026 9:50 AM EDT
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.

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Market Analytics for Somerville, MA

Real-time market trends and pricing data for this area

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