
20 John St Chelsea — Photo 1 of 31
Beds
5
Baths
2
SqFt
4,797
Style
Single Family
Built
1915
If you’ve been looking for unmatched scale and solid historic character minutes from Downtown, 20 John Street delivers on every level. If you want tiny, cramped rooms, this isn't the house for you-every single space here is oversized. Finished attic with clean hardwood floors, spacious bedrooms, high ceilings, classic crown moldings, and plenty of natural light. the property features a foyer with vintage stained glass . Beyond the massive interior footprint, a deep paved driveway and a rare, 2-car garage solve all your families parking needs. This is an expansive lot with solid bones and unmatched space-to-value for the area.
Market Value Analysis
* Analysis is based on 23 actively listed and recently sold comparable properties strictly within Chelsea, MA.
Property Details
Financials
Parking
Interior Specifications
Climate & Utilities
Building & Exterior
Property & Lot
Amenities & Appliances
Gas Water Heater
Geography
Population
39,908
U.S. Census Bureau, ACS 2024 5-Year Estimates (B01003)
Median Household Income
$72K
U.S. Census Bureau, ACS 2024 5-Year Estimates (B19013)
Renter-Occupied Homes
74.0%
U.S. Census Bureau, ACS 2024 5-Year Estimates (B25003)
New Construction Permits — Suffolk County
2,337 housing units permitted in the last 12 months (+13% vs the prior 12 months) — 2,062 in 5+ unit buildings
U.S. Census Bureau, Building Permits Survey (through Jul '26)
ADU Potential
Massachusetts allows one accessory dwelling unit by right in single-family zoning districts statewide (M.G.L. c. 40A §3; 760 CMR 71.00, effective Feb 2025). Estimated maximum ADU size for this property: 900 sq ft (the lesser of 900 sq ft or half the 4,797 sq ft principal dwelling). Lot size: 6,376 sq ft.
Based on listing data, which indicates the property type — not the zoning district. Local dimensional, septic (Title 5), and historic-district requirements still apply. Not legal advice — verify with the municipality.
Listing Agent: Kevin Alen
Listing Office: Cameron Prestige, LLC
MLS® Number: 73547861
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