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Charlestown, Boston · Condominium Association

21 Main Street Condominiums

A 21-unit condominium community in Charlestown, Boston.

Median Sale
$1.6m
Price / Sq Ft
$879
Avg Days on Mkt
69 days
Sold
1
HOA Range
$493–493/mo
Total Units
21

Market figures reflect closed sales over recent sales. Data sourced from MLS PIN.

Homes for Sale in 21 Main Street

No units are currently listed in 21 Main Street. Inventory here moves quickly — join the off-market list below to hear first when one comes up, or explore these similar nearby communities that have availability:

Overview

21 Main Street is a 21-unit condominium association in Boston, Massachusetts (Charlestown).

Contact Justin Rollo for the latest availability, recent sales, and condo-fee details for 21 Main Street.

Recent Sales

Sold Aug 202511 Harvard Street
$1.6m
11 Harvard Street #2
3 bd · 2 ba · 1,831 sqft · 69 days

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About Your 21 Main Street Expert

JR

Justin Rollo

21 Main Street Condominium Specialist · Signal Real Estate

Justin Rollo is a Massachusetts real estate expert with over a decade of experience and hundreds of South Shore transactions. He tracks every sale, pending, and price movement inside 21 Main Street — so whether you're buying into the community or thinking about selling, you're working with someone who knows this specific association inside and out.

Ask Justin about 21 Main Street →

Frequently Asked Questions

How many units are in 21 Main Street?

21 Main Street is a 21-unit condominium association in Boston, MA.