12 Hersom St, Watertown, MA 02472 Property Records

Middlesex County and Watertown City property record for 12 Hersom St, Watertown, MA 02472

Property Summary

Property Type	Condominium
Details	2 bd · 1 ba · 790 sqft · built 1900
Lot Size	0.127 acres (5,534 sqft)
Owner	Individual Name on File
Last Sale	$355,000 (May 2017)
Tax Bill	$5,250 (2025)
Deeds & Mortgages	Nov 2021 Refinance Jun 2020 Refinance + 1 more
Flood Zone	Zone X (minimal risk)
APN	`300182-24`

Property Details

APN / Parcel Number

Primary APN	`300182-24`
Alternative APNs	`WATE M:0609 B:0038 L:0346A` `9570`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	5 Rooms
Stories	3 Stories
Building Area	790 sqft Living Area
Gross Area	1,239 sqft
Basement Area	325 sqft
Unfinished Basement	325 sqft

Exterior

Year Built	Built 1900
Effective Year Built	Effective 1900
Architectural Style	Conventional
Exterior Material	Asbestos
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	5,534 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C
Heating Fuel	Gas

Location & Zoning

Account Number	9570
Street Address	12 HERSOM ST
City	WATERTOWN
State	MA
Zip	02472-1611
Property Category	Residential
Property Type	Residential > Condominium / Townhouse > Condominium
Local Zoning Code	T
Legal Subdivision	12-14 HERSOM STREET CONDO
Legal Block	38
Legal Lot Number	346A
Jurisdiction	WATERTOWN MA
Township / Civil Division	WATERTOWN TOWN
Census Block Group	3
Census Block	3005
Census Tract	370101

Owner

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

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

Owner of Record	Individual Name on File
Mailing Address	12 HERSOM ST, WATERTOWN, MA 02472-1611
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Nov 30, 2021	Deed of Trust, Mortgage · Stand-Alone Refinance UNION HOME MORTGAGE
Jun 19, 2020	Deed of Trust, Mortgage · Stand-Alone Refinance MORTGAGE NETWORK INC
May 12, 2017	Quit Claim Deed, Transfer · Conventional with PMI MORTGAGE NTWK

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	May 12, 2017 · Amount on Record
Deed Sale	May 12, 2017 · Amount on Record
Prior Sale	Sep 28, 2007 · Amount on Record
Deed Book / Page	69271 / 210
Record Updated	Sep 20, 2026

November 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WATERTOWN MA
Property Address	12 HERSOM ST, WATERTOWN, MA 02472-1611
Transaction Type	Mortgage
Record Updated	Apr 3, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	079241-114
Date	Nov 30, 2021
Book Page	79241/114
Instrument	258314

Lender

Name	UNION HOME MORTGAGE

Agreement

Type	Stand-Alone Refinance
Amount	Amount Recorded
Term	361 Months
Due	Dec 1, 2051

June 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WATERTOWN MA
Property Address	12 HERSOM ST, WATERTOWN, MA 02472-1611
Transaction Type	Mortgage
Record Updated	Feb 5, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	74923-105
Date	Jun 19, 2020
Book Page	74923/105
Instrument	96073

Lender

Name	MORTGAGE NETWORK INC
Type	Mortgage Company

Agreement

Type	Stand-Alone Refinance
Amount	Amount Recorded
Term	361 Months
Due	Jul 1, 2050

May 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	WATERTOWN MA
Recording Date	May 12, 2017
Property Address	12 HERSOM ST, WATERTOWN, MA 02472-1611
Document Number	69271-210
Book / Page	069271 / 000210
Instrument Date	May 11, 2017
Instrument	70324
Transaction Type	Transfer
Record Updated	May 30, 2017

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$1,618.00
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	12 HERSOM ST WATERTOWN MA 024721611, WATERTOWN, MA 02472-1611

Mortgage

Document Number	69271-212
Date	May 12, 2017
Book Page	069271/000212
Instrument	70325

Lender

Name	MORTGAGE NTWK
Type	Mortgage Company

Agreement

Type	Conventional with PMI
Amount	Amount Recorded
Term	360 Months
Due	May 11, 2047

Tax Assessment & Valuation

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$5,250.00 (-1.52%)	$449,500 (-1.34%) Building $449,500	$537,985 (+5.83%)
2024	$5,331.00 (-10.42%)	$455,600 (+3.97%) Building $455,600	$508,345
2023	$5,951.00	$438,200 Building $438,200

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

Flood

Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	1 in force
Nearby Flood Claims	1 (1978)
Most Recent Claim	Feb 1978 · tidal / storm surge

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; 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	WATERTOWN DEPARTMENT OF PUBLIC WORKS serves 35,985 people · EPA ID MA3314000
Water Source	Purchased surface water from MWRA
Last State Inspection	Oct 2025
Lead	1 ppb (2025) 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 926 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 2,000
Astound Broadband Cable	1,500 / 50
Verizon Fiber · Fixed Wireless in parts of the area	980 / 880

May also be available: AT&T, T-Mobile.

Cell Coverage

5G (outdoors only) and 4G LTE

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