185 Onset Ave, Wareham — property record card
Residential Condominium built in 1986 in Wareham, assessed at $5,648,200 for fiscal year 2027; last sold for $450,000 on October 3, 2025.
Rebuilt from the Wareham assessor file as published by MassGIS — not the official card. For the official card, with owner, photo and sketch, ask the Wareham assessor’s office.
Parcel
| Location | 185 Onset Ave |
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| Map and parcel ID | 1_125_A 1_125_A_O |
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| Use | Residential Condominium (use code 1021) |
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| Zoning | OVC |
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| County | Plymouth |
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Valuation — fiscal year 2027
| Building | $5,648,200 |
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| Land | $0 |
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| Total assessed | $5,648,200 |
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Building
| Year built | 1986 |
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| Style | Condo Townhse |
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| Living area | 1,284 ft² |
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| Rooms | 5 |
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| Units | 17 |
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Last recorded sale
| Price | $450,000 |
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| Date | October 3, 2025 |
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| Deed | Registry of Deeds book 60405, page 15 |
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17 assessor accounts on this parcel
Condominium units or several buildings share one parcel; each has its own assessment.
| Address | Account | Use | Assessed | Last sale |
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| 185 Onset Ave | 1_125_A_G | Residential Condominium | $420,200 | $320,000
January 7, 2025 |
| 185 Onset Ave | 1_125_A_H | Residential Condominium | $326,400 | nominal ($100)
April 20, 2022 |
| 185 Onset Ave | 1_125_A_J | Residential Condominium | $348,700 | nominal ($1)
July 13, 2020 |
| 185 Onset Ave | 1_125_A_K | Residential Condominium | $328,300 | nominal ($100)
September 15, 2015 |
| 185 Onset Ave | 1_125_A_L | Residential Condominium | $388,700 | $405,000
October 21, 2021 |
| 185 Onset Ave | 1_125_A_M | Residential Condominium | $378,800 | $375,000
December 30, 2021 |
| 185 Onset Ave | 1_125_A_N | Residential Condominium | $390,400 | $307,000
April 29, 2009 |
| 185 Onset Ave | 1_125_A_O | Residential Condominium | $423,100 | $450,000
October 3, 2025 |
| 185 Onset Ave | 1_125_A_P | Residential Condominium | $411,700 | $399,900
December 9, 2021 |
| 185 Onset Ave | 1_125_A_C | Residential Condominium | $306,400 | $391,000
May 6, 2025 |
| 185 Onset Ave | 1_125_A_A | Residential Condominium | $275,100 | $230,000
August 8, 2016 |
| 185 Onset Ave | 1_125_A_B | Residential Condominium | $274,500 | $138,900
June 2, 2000 |
| 185 Onset Ave | 1_125_A_D | Residential Condominium | $299,000 | $195,000
March 12, 2015 |
| 185 Onset Ave | 1_125_A_E | Residential Condominium | $328,900 | $335,104
August 29, 2023 |
| 185 Onset Ave | 1_125_A_F | Residential Condominium | $328,100 | $350,000
August 1, 2023 |
| 185 Onset Ave | 1_125_A_Q | Residential Condominium | $419,900 | nominal ($1)
February 7, 2019 |
| 185-185 Onset Ave | 1_125_42 | Other, Open Space | $0 | |
What MassDEP has recorded
No tier-classified 21E site and no Activity and Use Limitation is mapped on this parcel.
What this means
- Assessed 595% above the median residential condominium in Wareham ($812,300, 76 parcels).
- The last sale price is 92% below the current assessment. Massachusetts assessments aim at full market value as of January 1 of the year before the fiscal year.
Point at the centre of the assessor parcel — not a survey.
Data: Wareham assessor file for fiscal year 2027, via MassGIS, retrieved October 30, 2026; MassDEP sites retrieved the same day. Sources and freshness. No owner names are published.
The report for 185 Onset Ave
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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