12 Old Colony Ln #10, Arlington — property record card
Residential Condominium built in 1965 in Arlington, assessed at $64,720,200 for fiscal year 2026; last sold for $308,000 on August 29, 2025.
Rebuilt from the Arlington assessor file as published by MassGIS — not the official card. For the official card, with owner, photo and sketch, ask the Arlington assessor’s office.
Parcel
| Location | 12 Old Colony Ln #10, Arlington MA 02476 |
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| Map and parcel ID | 056.0-0002-0008.0 056.A-0012-0010.0 |
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| Use | Residential Condominium (use code 102) |
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| Zoning | R5 |
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| County | Middlesex |
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Valuation — fiscal year 2026
| Building | $64,720,200 |
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| Land | $0 |
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| Total assessed | $64,720,200 |
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Building
| Year built | 1965 |
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| Style | Condo Garden |
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| Living area | 605 ft² |
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| Rooms | 3 |
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| Stories | 1 |
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Last recorded sale
| Price | $308,000 |
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| Date | August 29, 2025 |
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| Deed | Registry of Deeds book 84555, page 139 |
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204 assessor accounts on this parcel
Condominium units or several buildings share one parcel; each has its own assessment (first 60 shown).
| Address | Account | Use | Assessed | Last sale |
|---|
| 1 Old Colony Ln #1 | 056.A-0001-0001.0 | Residential Condominium | $310,700 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #2 | 056.A-0001-0002.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #3 | 056.A-0001-0003.0 | Residential Condominium | $227,600 | nominal ($10) August 1, 2017 |
| 1 Old Colony Ln #4 | 056.A-0001-0004.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #5 | 056.A-0001-0005.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #6 | 056.A-0001-0006.0 | Residential Condominium | $290,500 | $200,000 February 2, 2023 |
| 1 Old Colony Ln #7 | 056.A-0001-0007.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #8 | 056.A-0001-0008.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #9 | 056.A-0001-0009.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #10 | 056.A-0001-0010.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #11 | 056.A-0001-0011.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 1 Old Colony Ln #12 | 056.A-0001-0012.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 2 Old Colony Ln #1 | 056.A-0002-0001.0 | Residential Condominium | $324,600 | $108,000 July 28, 1998 |
| 2 Old Colony Ln #2 | 056.A-0002-0002.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 2 Old Colony Ln #3 | 056.A-0002-0003.0 | Residential Condominium | $324,600 | $335,000 December 21, 2023 |
| 2 Old Colony Ln #4 | 056.A-0002-0004.0 | Residential Condominium | $231,000 | $289,900 July 25, 2025 |
| 2 Old Colony Ln #5 | 056.A-0002-0005.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 2 Old Colony Ln #6 | 056.A-0002-0006.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 2 Old Colony Ln #7 | 056.A-0002-0007.0 | Residential Condominium | $331,400 | $198,000 July 1, 2002 |
| 2 Old Colony Ln #8 | 056.A-0002-0008.0 | Residential Condominium | $313,400 | $150,000 June 18, 2013 |
| 2 Old Colony Ln #9 | 056.A-0002-0009.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 2 Old Colony Ln #10 | 056.A-0002-0010.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 2 Old Colony Ln #11 | 056.A-0002-0011.0 | Residential Condominium | $324,600 | $20,035,000 May 2, 2013 |
| 2 Old Colony Ln #12 | 056.A-0002-0012.0 | Residential Condominium | $313,400 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #1 | 056.A-0003-0001.0 | Residential Condominium | $339,000 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #2 | 056.A-0003-0002.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #3 | 056.A-0003-0003.0 | Residential Condominium | $339,000 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #4 | 056.A-0003-0004.0 | Residential Condominium | $232,700 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #5 | 056.A-0003-0005.0 | Residential Condominium | $339,000 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #6 | 056.A-0003-0006.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #7 | 056.A-0003-0007.0 | Residential Condominium | $339,000 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #8 | 056.A-0003-0008.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #9 | 056.A-0003-0009.0 | Residential Condominium | $339,000 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #10 | 056.A-0003-0010.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #11 | 056.A-0003-0011.0 | Residential Condominium | $339,000 | $20,035,000 May 2, 2013 |
| 3 Old Colony Ln #12 | 056.A-0003-0012.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #1 | 056.A-0004-0001.0 | Residential Condominium | $319,400 | $154,000 April 25, 2013 |
| 4 Old Colony Ln #2 | 056.A-0004-0002.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #3 | 056.A-0004-0003.0 | Residential Condominium | $232,700 | nominal ($99) August 17, 2022 |
| 4 Old Colony Ln #4 | 056.A-0004-0004.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #5 | 056.A-0004-0005.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #6 | 056.A-0004-0006.0 | Residential Condominium | $320,200 | $150,400 January 27, 2011 |
| 4 Old Colony Ln #7 | 056.A-0004-0007.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #8 | 056.A-0004-0008.0 | Residential Condominium | $320,200 | $180,000 February 26, 2016 |
| 4 Old Colony Ln #9 | 056.A-0004-0009.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #10 | 056.A-0004-0010.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #11 | 056.A-0004-0011.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 4 Old Colony Ln #12 | 056.A-0004-0012.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #1 | 056.A-0005-0001.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #2 | 056.A-0005-0002.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #3 | 056.A-0005-0003.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #4 | 056.A-0005-0004.0 | Residential Condominium | $232,700 | nominal ($1) July 31, 1999 |
| 5 Old Colony Ln #5 | 056.A-0005-0005.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #6 | 056.A-0005-0006.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #7 | 056.A-0005-0007.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #8 | 056.A-0005-0008.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #9 | 056.A-0005-0009.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #10 | 056.A-0005-0010.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #11 | 056.A-0005-0011.0 | Residential Condominium | $320,200 | $20,035,000 May 2, 2013 |
| 5 Old Colony Ln #12 | 056.A-0005-0012.0 | Residential Condominium | $319,400 | $20,035,000 May 2, 2013 |
What MassDEP has recorded
- RTN 3-0033282 — 2 Old Colony Lane, tier classified (active), status TIERII · MassDEP file
Within about 500 m (a third of a mile): 2 active tier-classified 21E sites and 0 sites with an Activity and Use Limitation. All MassDEP sites in Arlington.
What this means
- Assessed 4027% above the median residential condominium in Arlington ($1,568,100, 1,265 parcels).
- The last sale price is 100% below the current assessment. Massachusetts assessments aim at full market value as of January 1 of the year before the fiscal year.
- A tier-classified site is a release still being cleaned up under the Massachusetts Contingency Plan; the MassDEP file shows the stage reached.
- Built before 1978: the Massachusetts Lead Law applies when a child under six lives there; ask for any lead inspection or letter of compliance.
Point at the centre of the assessor parcel — not a survey.
Data: Arlington 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 12 Old Colony Ln #10
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.
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