47 Hersom St, Watertown, MA 02472 Property Records

Middlesex County and Watertown City property record for 47 Hersom St, Watertown, MA 02472

Property Summary

Property Type	Condominium
Details	2 bd · 1.5 ba · 1,239 sqft · built 1928
Lot Size	0.095 acres (4,152 sqft)
Owner	Individual Name on File
Last Sale	$625,000 (Sep 2023)
Tax Bill	$6,730 (2025)
Deeds & Mortgages	Sep 2023 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`31740-02`

Property Details

APN / Parcel Number

Primary APN	`31740-02`
Alternative APNs	`WATE M:0608 B:0017 L:0326B` `10815`

Interior

Bedrooms	2 Beds
Full Baths	1.5 Baths
Half Baths	1 Half Bath
Total Rooms	6 Rooms
Stories	2 Stories
Building Area	1,239 sqft Living Area

Exterior

Year Built	Built 1928
Effective Year Built	Effective 1928
Architectural Style	Condo/Apartment
Exterior Material	Aluminum/Vinyl
Construction Type	Frame
Roof Type	Gable
Roof Material	Asphalt
Lot Area	4,152 sqft

Utilities, Heating & Cooling

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

Location & Zoning

Account Number	10815
Street Address	47 HERSOM ST
City	WATERTOWN
State	MA
Zip	02472-1610
Property Category	Residential
Property Type	Residential > Condominium / Townhouse > Condominium
Local Zoning Code	T
Legal Block	17
Legal Lot Number	326B
Jurisdiction	WATERTOWN MA
Township / Civil Division	WATERTOWN TOWN
Census Block Group	3
Census Block	3004
Census Tract	370101

Owner

47 Hersom St, a condominium, is owned and occupied by an individual who bought it in September 2023.

Source: Middlesex County and Watertown City records, as of July 20, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on File
Mailing Address	47 HERSOM ST, WATERTOWN, MA 02472-1610
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 28, 2023 · Amount on File
Deed Sale	Sep 28, 2023 · Amount on File
Deed Book / Page	82044 / 68
Record Updated	Sep 20, 2026

September 2023: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	WATERTOWN MA
Recording Date	Sep 28, 2023
Property Address	47 HERSOM ST, WATERTOWN, MA 02472-1610
Document Number	0082044-68
Book / Page	82044 / 68
Instrument Date	Sep 28, 2023
Instrument	109780
Transaction Type	Transfer
Record Updated	Nov 20, 2025

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	47-49 HERSOM ST # 47, 47, WATERTOWN, MA 02472-1610

Mortgage

Document Number	0000109781
Date	Sep 28, 2023
Instrument	109781

Lender

Name	GUARANTEED RATE INC
Type	Non-Lending Institution

Agreement

Type	Stand-Alone First Mortgage
Amount	Amount on Record

Tax Assessment & Valuation

The 2025 property tax bill for 47 Hersom St was $6,730, up 11.5% from the year before.

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	$6,730.00 (+11.46%)	$576,200 (+11.65%) Building $576,200	$678,110 (+16.29%)
2024	$6,038.00 (-10.51%)	$516,100 (+3.88%) Building $516,100	$583,110
2023	$6,747.00	$496,800 Building $496,800

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

Flood

FEMA maps place 47 Hersom St in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1978.

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

The area around 47 Hersom St has no burnable land within ember reach, so its wildfire risk is not rated.

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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