20 Cooper St, Waltham — property record card
Apartments with More than Eight Units built in 2019 on 4.32 acres in Waltham, assessed at $116,228,000 for fiscal year 2026; last sold for $139,000,000 on December 1, 2020.
Rebuilt from the Waltham assessor file as published by MassGIS — not the official card. For the official card, with owner, photo and sketch, ask the Waltham assessor’s office.
Parcel
| Location | 20 Cooper St |
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| Map and parcel ID | R060 029 0002 |
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| Use | Apartments with More than Eight Units (use code 112) |
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| County | Middlesex |
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Valuation — fiscal year 2026
| Building | $85,340,000 |
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| Land | $30,888,000 |
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| Total assessed | $116,228,000 |
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Land
| Lot size | 4.32 acres (188,179 ft²) |
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Building
| Year built | 2019 |
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| Style | APARTMENTS |
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| Living area | 165,986 ft² |
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| Rooms | 8 |
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| Stories | 5 |
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Last recorded sale
| Price | $139,000,000 |
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| Date | December 1, 2020 |
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| Deed | Registry of Deeds book 76313, page 112 |
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What MassDEP has recorded
- RTN 3-0002118 — Longview Fibre Co, tier classified (active), status TIERII · MassDEP file
- RTN 3-0002118 — Longview Fibre Co, activity and use limitation, status TIERII, class PA, AUL recorded January 29, 2016 · MassDEP file
Within about 500 m (a third of a mile): 3 active tier-classified 21E sites and 3 sites with an Activity and Use Limitation. All MassDEP sites in Waltham.
What this means
- Assessed 2531% above the median apartments with more than eight units in Waltham ($4,417,400, 136 parcels).
- 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.
- A tier-classified site is a release still being cleaned up under the Massachusetts Contingency Plan; the MassDEP file shows the stage reached.
Point at the centre of the assessor parcel — not a survey.
Data: Waltham 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 20 Cooper 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