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.
Sold for $836,000
$836,000
21 Stone Ave Unit 21, Somerville, MA 02143
2beds
1,021sqft
Condominium
Built in 1900
-- sqft lot
$835,500 Zestimate®
$819/sqft
$3,769 Estimated rent
Home value
$835,500
$785,000 - $894,000
$3,769/mo
Zestimate® history
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$5,460/mo
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List your homeWhat's special
Private entryOff-street parking spaceQuiet side streetLarge windowsTall ceilings
Zillow last checked:
Listing updated:
Listed by:
The Moving Greater Boston Team 617-744-4677,
Berkshire Hathaway HomeServices Warren Residential 617-848-9616,
Jacqueline Vienneau 603-231-0089
Bought with:
Abigail Ojemann
Compass
Source: MLS PIN,MLS#: 73500433
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 1
- Full bathrooms: 1
Primary bathroom
- Features: No
Heating
- Baseboard, Steam, Natural Gas
Cooling
- Window Unit(s)
Appliances
- Included: Range, Dishwasher, Refrigerator, Freezer, Washer, Dryer
- Laundry: In Building
Features
- Flooring: Hardwood
- Has basement: No
- Has fireplace: No
Interior area
- Total structure area: 1,021
- Total interior livable area: 1,021 sqft
- Finished area above ground: 1,021
Property
Parking
- Total spaces: 1
- Parking features: Off Street, Deeded
- Uncovered spaces: 1
Features
- Patio & porch: Patio
- Exterior features: Patio
Details
- Parcel number: 4587370
- Zoning: CC
Construction
Type & style
- Home type: Condo
- Property subtype: Condominium
Materials
- Frame
- Roof: Shingle
Condition
- Year built: 1900
Utilities & green energy
- Sewer: Public Sewer
- Water: Public
Community & HOA
Community
- Features: Public Transportation, Shopping, Park, Walk/Jog Trails, Bike Path, Highway Access, Public School, T-Station
HOA
- Services included: Water, Sewer, Insurance, Reserve Funds
- HOA fee: $250 monthly
Location
- Region: Somerville
Financial & listing details
- Price per square foot: $819/sqft
- Tax assessed value: $793,400
- Annual tax amount: $4,245
- Date on market: 5/14/2026
Price history
| Date | Event | Price |
|---|---|---|
| 6/11/2026 | Sold | $836,000-1.5%$819/sqft |
Source: MLS PIN #73500433 Report a problem | ||
| 5/12/2026 | Pending sale | $849,000$832/sqft |
Source: BHHS broker feed #73500433 Report a problem | ||
| 5/11/2026 | Contingent | $849,000$832/sqft |
Source: MLS PIN #73500433 Report a problem | ||
| 4/13/2026 | Listed for sale | $849,000-0.1%$832/sqft |
Source: MLS PIN #73500433 Report a problem | ||
| 6/8/2022 | Sold | $850,000$833/sqft |
Source: MLS PIN #72976387 Report a problem | ||
Public tax history
Tax history is unavailable.
Neighborhood: Union Square
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Nearby schools
GreatSchools rating
- 7/10Albert F. Argenziano School At Lincoln ParkGrades: PK-8Distance: 0.2 mi
- 6/10Somerville High SchoolGrades: 9-12Distance: 0.4 mi
- NACapuano Early Childhood CenterGrades: PK-KDistance: 0.5 mi
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Estimated market value
$835,500
Get a cash offer in 3 minutes
Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
Estimated market value
$835,500
- Massachusetts
- Middlesex County
- Somerville
- 02143
- Union Square
- 21 Stone Ave Unit 21
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