185 Arsenal St, Watertown — property record card
Single Family Residential built in 1999 on 0.10 acres in Watertown, assessed at $789,400 for fiscal year 2026; last sold for $1,060,000 on October 31, 2025.
Rebuilt from the Watertown assessor file as published by MassGIS — not the official card. For the official card, with owner, photo and sketch, ask the Watertown assessor’s office.
Parcel
| Location | 185 Arsenal St |
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| Map and parcel ID | 903 2 7 |
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| Use | Single Family Residential (use code 1010) |
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| County | Middlesex |
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Valuation — fiscal year 2026
| Building | $400,000 |
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| Land | $388,800 |
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| Other | $600 |
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| Total assessed | $789,400 |
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Land
| Lot size | 0.10 acres (4,404 ft²) |
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Building
| Year built | 1999 |
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| Style | Colonial |
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| Living area | 1,536 ft² |
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| Rooms | 6 |
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| Stories | 2 |
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Last recorded sale
| Price | $1,060,000 |
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| Date | October 31, 2025 |
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| Deed | Registry of Deeds book 84818, page 348 |
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What MassDEP has recorded
- RTN 3-0028170 — Former Railroad Right-of-way, activity and use limitation, status PSC, class B2, AUL recorded November 21, 2016 · MassDEP file
Within about 500 m (a third of a mile): 1 active tier-classified 21E site and 8 sites with an Activity and Use Limitation. All MassDEP sites in Watertown.
What this means
- Assessed 9% below the median single family residential in Watertown ($870,900, 2,843 parcels).
- The last sale price is 34% above the current assessment. Massachusetts assessments aim at full market value as of January 1 of the year before the fiscal year.
- An Activity and Use Limitation is a deed restriction: it limits how the land may be used (often no residential use or no digging) and passes to every buyer.
Point at the centre of the assessor parcel — not a survey.
Data: Watertown assessor file for fiscal year 2026, via MassGIS, retrieved October 30, 2026; MassDEP sites retrieved the same day. Sources and freshness. No owner names are published.
The report for 185 Arsenal St
This page shows the assessor record and the MassDEP sites on the parcel. The report adds what lies around it: FEMA flood zone, wetlands, Zone II and other water supply protection areas, priority habitat, sewer or septic service, protected open space, and every 21E site within half a mile.
$19card · PDF within 24 h · you pay after receiving itSee the sample (PDF)
Order the report