21 William St Cambridge, MA 02139 / 3915

Map

Residence for Single Family

(UPDATED: 08/22/2025)
  • 4 Beds
  • 2 Baths
  • 3.292 square feet
Property Report

Information about property on 21 William St, Cambridge MA, 02139-3915. Find out owner contacts, building history, price, neighborhood at Homemetry Address Directory.

Property Details

This 3,292 square feet property was constructed in 1854 on 0,13 acres and it contains four bedrooms and two and half bathrooms.

Facts

  • Built in 1854
  • Lot size 5,588 sqft
  • Floor size 3,292 sqft
  • Construction Brick
  • Rooms 8
  • Bedrooms 4
  • Bathrooms 2,5
  • Stories 3 story with attic and basement
  • Style Conventional
  • Basement Full Basement
  • Heating & Cooling
  • Heat type Hot Water
  • Exterior Home Features
  • Exterior material Wood
  • Exterior walls Wood Siding
  • Roof type Asphalt
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Listing info

  • Last sold Dec 1998 for $695,000

Features

  • Fireplace

Householders and Tenants for 21 William St, Cambridge MA

Purchase History

DateEventPriceSourceAgents
12/22/1998 Sold $695,000 Public records

Cost estimate history

YearTaxAssessmentMarket
2014 $9,205 $1,098,400 N/A
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Where is 21 William St, Cambridge MA located on map?

Building Permits

To date, we have no information about building permits in 2025
Jun 21, 2011
Description: Roof:new roof
  • Valuation: $590,000
  • Permit #: 611196-059052
Nov 9, 1999
Description: Gas:bsmt./ water heater
  • Permit #: 1199037-081815
Jan 27, 1999
Description: Wiring:low voltage burglar wiring
  • Permit #: 12173-143536

William St Fire Incident History

To date, we have no information about fire incidents in 2025
28 Sep 2009 Building fires
39 William St, Cambridge MA
Property Use —
Residential, other
Area of Origin —
Attic: vacant, crawl space above top story, cupola
First Ignition —
Electrical wire, cable insulation
Heat Source —
Hot or smoldering object, other
28 Sep 2009 Building fires
39 William St, Cambridge MA
Property Use —
Residential, other
Area of Origin —
Ceiling & floor assembly, crawl space b/t stories
First Ignition —
Electrical wire, cable insulation
Heat Source —
Spark, ember or flame from operating equipment

21 William St incidents registered in FEMA
(Federal Emergency Management Agency)

To date, we have no information about incidents registered in FEMA in 2025
24 Jan 2010 Overheated motor
21 William St, Cambridge MA
Property Use —
1 or 2 family dwelling

William St Incidents registered in FEMA
(Federal Emergency Management Agency)

To date, we have no information about incidents registered in FEMA in 2025
02 Feb 2015 Hazardous condition, other
44 William St, Cambridge MA
Property Use —
Church, mosque, synagogue, temple, chapel
05 Jan 2015 Power line down
39 William St, Cambridge MA
Property Use —
Residential street, road or residential driveway
21 Dec 2012 Carbon monoxide incident
4 William St, Cambridge MA
Property Use —
1 or 2 family dwelling
11 Nov 2012 Carbon monoxide incident
39 William St, Cambridge MA
Property Use —
Mental retardation/development disability facility

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Properties Nearby

Street Address
2 William St, Cambridge, MA 02139-3916
3 William St, Cambridge, MA 02139-3915
Multiple Occupancy
  • 4 beds
  • 1.5 baths
  • 2,033 sqft
  • Built in 1857

William Street

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Recent rentals on William Street (6)

Cambridge, MA

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Houses for Rent on Cambridge, MA (474)

Recent rentals on Cambridge, MA (3569)

 

FAQ about the house at 21 William St, Cambridge, MA

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