485 Arsenal St, Watertown — property record card
IMPUTED - Medical Office Buildings built in 1910 on 3.14 acres in Watertown, assessed at $13,601,400 for fiscal year 2026; last transferred August 9, 2022 for a nominal sum.
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 | 485 Arsenal St |
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| Map and parcel ID | 1301 2A 1 |
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| Use | IMPUTED - Medical Office Buildings (use code 342C) |
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| County | Middlesex |
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Valuation — fiscal year 2026
| Building | $5,963,200 |
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| Land | $7,139,900 |
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| Other | $498,300 |
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| Total assessed | $13,601,400 |
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Land
| Lot size | 3.14 acres (136,778 ft²) |
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Building
| Year built | 1910 |
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| Style | Office Bldg |
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| Living area | 47,577 ft² |
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| Stories | 2.5 |
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Last recorded sale
| Price | nominal ($10) |
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| Date | August 9, 2022 |
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| Deed | Registry of Deeds book 80552, page 516 |
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What MassDEP has recorded
- RTN 3-0035015 — Building A - Arsenal Yards, activity and use limitation, status PSC, class PA, AUL recorded July 1, 2019 · MassDEP file
Within about 500 m (a third of a mile): 7 active tier-classified 21E sites and 11 sites with an Activity and Use Limitation. All MassDEP sites in Watertown.
What this means
- The last deed was recorded for a nominal sum: a transfer between family members, into a trust or a similar non-market sale. It says nothing about the market value.
- 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 485 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)
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