Incredible opportunity in coveted Prattville neighborhood! This 2-family sits on a quiet side street & offers amazing rental upside or owner-occupant potential. Unit 1 features 3 spacious beds, 1 bath, an eat-in kitchen with gas cooking, & laundry hookups. Unit 2 is a gorgeous 2-level duplex remodeled in 2025, boasting 4 beds, 2 baths, a sunlit living room, & a modern stainless steel kitchen. Major updates include: roof (2018), gas heating conversion & systems (2010), & replacement windows (2009). Easily add central A/C if desired! Complete with a large driveway for 3 off-street parking spaces. Truly a turnkey gem in a highly desirable neighborhood!
| Units | 2 |
| Living area | 3,103 sqft |
| Lot size | 4,870 sqft |
| Year built | 1900 |
| Price / sqft | $311 |
| County | Suffolk |
| MLS # | 73539965 |
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Listing courtesy of a MLS PIN member office. Listing data © MLS PIN.
Auto-generated from the listing data — richer AI answers coming with the live site.
It is a 2-unit multi-family property with 3,103 sqft of living area, built in 1900.
At a list price of $899,900 across 2 units, that works out to roughly $449,950 per unit.
At $899,900 for 3,103 sqft, that's about $311 per square foot.
21 John St, Chelsea MA 02150 is in Chelsea, Suffolk County, MA 02150.

Justin Rollo is a Broker Associate with Signal Real Estate (MA Lic. #9534264) and a lifelong Massachusetts resident. Over 14 years and hundreds of transactions, he has worked investment properties — multi-families and house-hacking — across Greater Boston full-time. Away from real estate, Justin is a proud dad, youth coach and local school-committee member — and a former professional poker player who still loves golf and following local sports.