Middlesex County and Watertown City property record for 20 Hersom St, Watertown, MA 02472
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,345 sqft · built 1900 |
| Lot Size | 0.133 acres (5,782 sqft) |
| Owner | 2 Trust Names on Record |
| Tax Bill | $10,257 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 31600-26 |
| Primary APN | 31600-26 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 7 Rooms |
| Stories | 2 Stories |
| Building Area | 1,345 sqft Living Area |
| Gross Area | 2,852 sqft |
| Basement Area | 715 sqft |
| Unfinished Basement | 715 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1900 |
| Architectural Style | Conventional |
| Exterior Material | Aluminum/Vinyl |
| Construction Type | Frame |
| Roof Type | Gable |
| Roof Material | Asphalt |
| Lot Area | 5,782 sqft (0.133 acres) |
| Parking Spaces | 1 Parking Space |
| Heating System | Hot Water |
|---|---|
| Heating Fuel | Gas |
| Account Number | 7972 |
|---|---|
| Street Address | 20 HERSOM ST |
| City | WATERTOWN |
| State | MA |
| Zip | 02472-1611 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | T |
| Legal Subdivision | BATE S ESTATE |
| Legal Block | 36 |
| Legal Lot Number | 344 |
| Jurisdiction | WATERTOWN MA |
| Township / Civil Division | WATERTOWN TOWN |
| Census Block Group | 3 |
| Census Block | 3005 |
| Census Tract | 370101 |
Source: Middlesex County and Watertown City records, as of October 20, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Trust Names on Record |
|---|---|
| Mailing Address | 24 MONUMENT AVE, CHARLESTOWN, MA 02129-3324 |
| Owner Type | Individual |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
Source: Middlesex County and Watertown City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Watertown City |
| Unified School District | Watertown School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $10,257.00 (+5.73%) | $840,700 (+1.22%) Land $528,500 Building $312,200 | $822,605 (-) |
| 2025 | $9,701.00 (+11.69%) | $830,600 (+11.88%) Land $528,500 Building $302,100 | $822,605 (-7.89%) |
| 2024 | $8,686.00 (-9.99%) | $742,400 (+4.48%) Land $499,700 Building $242,700 | $893,095 |
| 2023 | $9,650.00 | $710,600 Land $478,000 Building $232,600 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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.
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.
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 |
| 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.
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.
5G (outdoors only) and 4G LTE
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