21 Upton St, Cambridge, MA 02139 Property Records

Middlesex County and Cambridge City property record for 21 Upton St, Cambridge, MA 02139

Property Summary

Property Type	Triplex
Details	6 bd · 3.5 ba · 2,670 sqft · built 1916
Lot Size	0.036 acres (1,585 sqft)
Owner	Company Name on Record
Last Sale	$775,000 (Nov 2012)
Tax Bill	$9,013 (2025)
Deeds & Mortgages	Jun 2021 Refinance Nov 2019 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`104-150`

Property Details

APN / Parcel Number

Primary APN	`104-150`
Alternative APN	`CAMB M:00104 L:00150`

Interior

Bedrooms	6 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	12 Rooms
Units	3 Units
Stories	3 Stories
Building Area	2,670 sqft Living Area
Gross Area	3,570 sqft
1st Floor Area	890 sqft
Basement Area	890 sqft
Unfinished Basement	890 sqft

Exterior

Year Built	Built 1916
Effective Year Built	Effective 1916
Architectural Style	Other
Exterior Material	Other
Construction Type	Stone
Roof Type	Flat
Roof Material	Other
Lot Area	1,585 sqft (0.036 acres)
Deck Area	Deck Area

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Forced Air with A/C
Heating Fuel	Gas

Location & Zoning

Street Address	21 UPTON ST
City	CAMBRIDGE
State	MA
Zip	02139-3870
Property Category	Residential
Property Type	Residential > Multi-Unit > Triplex
Local Zoning Code	C
Legal Lot Number	150
Jurisdiction	CAMBRIDGE MA
Township / Civil Division	CAMBRIDGE
Census Block Group	1
Census Block	1002
Census Tract	353300

Owner

Source: Middlesex County and Cambridge City records, as of October 9, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Company Name on Record
Mailing Address	19 MAPLE AVE, CAMBRIDGE, MA 02139-1115
Owner Type	Company
Vesting	Company

Deeds, Mortgages & Sale History

Date	Document
Jun 15, 2021	Deed of Trust, Mortgage · Stand-Alone Refinance CAMBRIDGE SAVINGS BANK
Nov 1, 2019	Grant Deed, Mortgage CAMBRIDGE SVGS BK

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Nov 16, 2012 · Amount on Record
Deed Sale	Nov 16, 2012 · Amount on Record
Prior Sale	Mar 31, 1999 · Amount on Record
Deed Book / Page	60503 / 251
Transfer Doc	060503-251
Record Updated	Oct 29, 2026

June 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CAMBRIDGE MA
Property Address	21 UPTON ST, CAMBRIDGE, MA 02139-3870
Transaction Type	Mortgage
Record Updated	Apr 3, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	078021-369
Date	Jun 15, 2021
Book Page	78021/369
Instrument	135430

Lender

Name	CAMBRIDGE SAVINGS BANK
Type	Bank

Agreement

Type	Stand-Alone Refinance
Amount	Amount Recorded

November 2019: Grant Deed, Mortgage

Document Type	Grant Deed
Jurisdiction	CAMBRIDGE MA
Recording Date	Nov 1, 2019
Property Address	21 UPTON ST, CAMBRIDGE, MA 02139-3870
Book / Page	073577 / 000279
Instrument Date	Oct 31, 2019
Instrument	170522
Transaction Type	Mortgage
Record Updated	Nov 19, 2019
Title Company	NOT AVAILABLE

Transaction

Tax	$0.00
Additional	Multiple Parcels

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	19 MAPLE AVE CAMBRIDGE MA 021391115, CAMBRIDGE, MA 02139-1115

Mortgage

Document Number	73577-279
Date	Nov 1, 2019
Book Page	073577/000279
Instrument	170522

Lender

Name	CAMBRIDGE SVGS BK
Type	Bank

Agreement

Amount	Amount Recorded

Tax Assessment & Valuation

Source: Middlesex County and Cambridge City assessment roll, as of April 14, 2026

Property Jurisdictions

Type	Name
State	Massachusetts
County	Middlesex County
Municipality	Cambridge City
Unified School District	Cambridge School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2025	$9,013.00 (+4.05%)	$1,419,300 (-3%) Land $788,200 Building $631,100
2024	$8,662.00 (+6.01%)	$1,463,200 (+4.94%) Land $855,300 Building $607,900
2023	$8,171.00	$1,394,300 Land $846,700 Building $547,600

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

Source: FEMA National Flood Hazard Layer, effective September 10, 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it

Values are read at the parcel center point; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	CAMBRIDGE WATER DEPARTMENT serves 118,214 people · EPA ID MA3049000
Water Source	Surface water
Last State Inspection	Jun 2023
Lead	8 ppb (2021–2023) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 910 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable · Fiber in parts of the area	2,000 / 2,000
Verizon Fixed Wireless	1,000 / 75
T-Mobile Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Starry.

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