18 Upton St, Cambridge, MA 02139 Property Records

Middlesex County and Cambridge City property record for 18 Upton St, Cambridge, MA 02139

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.5 ba · 1,360 sqft · built 1871
Lot Size	0.038 acres (1,639 sqft)
Owner	2 Individual Names on File
Last Sale	$547,500 (Jul 2008)
Tax Bill	$8,051 (2025)
Deeds & Mortgages	Dec 2016 Line of Credit
Flood Zone	Zone X (minimal risk)
APN	`104-55`

Property Details

APN / Parcel Number

Primary APN	`104-55`
Alternative APN	`CAMB M:00104 L:00055`

Interior

Bedrooms	3 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	7 Rooms
Stories	2 Stories
Building Area	1,360 sqft Living Area
Gross Area	2,112 sqft
1st Floor Area	680 sqft
Basement Area	680 sqft
Unfinished Basement	132 sqft

Exterior

Year Built	Built 1871
Effective Year Built	Effective 1871
Architectural Style	Other
Exterior Material	Wood Siding
Construction Type	Brick
Roof Type	Mansard
Roof Material	Asphalt
Lot Area	1,639 sqft (0.038 acres)
Deck Area	Deck Area

Utilities, Heating & Cooling

Cooling System	HVAC
Heating System	Hot Water
Heating Fuel	Gas

Location & Zoning

Street Address	18 UPTON ST
City	CAMBRIDGE
State	MA
Zip	02139-3809
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	C
Legal Lot Number	55
Jurisdiction	CAMBRIDGE MA
Township / Civil Division	CAMBRIDGE
Census Block Group	1
Census Block	1006
Census Tract	353300

Owner

Source: Middlesex County and Cambridge City records · APN 104-55

Assessment roll updated April 14, 2026 · Last verified July 2026

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

Owner of Record	2 Individual Names on File
Mailing Address	18 UPTON ST, CAMBRIDGE, MA 02139-3809
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Jul 31, 2008 · Amount on Record
Deed Sale	Jul 31, 2008 · Amount on Record
Prior Sale	Jun 19, 2006 · Amount on Record
Deed Document Number	2008127029
Deed Book / Page	51516 / 309
Transfer Doc	0000215437
Record Updated	Sep 20, 2026

December 2016: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CAMBRIDGE MA
Property Address	18 UPTON ST, CAMBRIDGE, MA 02139-3809
Document Number	69106-382
Book / Page	069106 / 000382
Instrument Date	Dec 30, 2016
Transaction Type	Mortgage
Record Updated	Apr 25, 2017

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	69106-382
Date	Apr 06, 2017
Book Page	069106/000382
Instrument	50374

Lender

Name	HARVARD UNIV CU
Type	Credit Union

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

Source: Middlesex County and Cambridge City records · Assessment roll updated April 14, 2026 · Last verified July 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

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$8,051.00 (+3.28%)	$1,267,900 (-3.71%) Land $650,100 Building $617,800	$1,389,660 (+10.29%)
2024	$7,795.00 (+9.6%)	$1,316,700 (+8.5%) Land $714,200 Building $602,500	$1,259,985
2023	$7,112.00	$1,213,600 Land $690,000 Building $523,600

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Middlesex County (25017C), as of September 10, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026

Flood

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

Wildfire

Wildfire Risk	Not rated no burnable land within ember reach

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

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

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 USA Fixed Wireless	100 / 20
AT&T Fixed Wireless	100 / 20

May also be available: Starry.

Based on FCC filings for 910 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System, water system MA3049000, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CAMBRIDGE WATER DEPARTMENT serves 118,214 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.