1 Seal Harbor Rd PH03, Winthrop — property record card
Residential Condominium built in 1983 in Winthrop, assessed at $82,806,700 for fiscal year 2026; last sold for $543,000 on March 2, 2026.
Rebuilt from the Winthrop assessor file as published by MassGIS — not the official card. For the official card, with owner, photo and sketch, ask the Winthrop assessor’s office.
Parcel
| Location | 1 Seal Harbor Rd PH03, Winthrop MA 02152 |
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| Map and parcel ID | 74_18 74_18_1P03 |
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| Use | Residential Condominium (use code 1020) |
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| County | Suffolk |
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Valuation — fiscal year 2026
| Building | $82,124,300 |
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| Land | $0 |
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| Other | $682,400 |
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| Total assessed | $82,806,700 |
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Building
| Year built | 1983 |
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| Style | Condominium |
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| Living area | 1,987 ft² |
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| Units | 129 |
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Last recorded sale
| Price | $543,000 |
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| Date | March 2, 2026 |
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| Deed | Registry of Deeds book 72471, page 73 |
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129 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 |
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| 1 Seal Harbor Rd 101 | 74_18_1101 | Residential Condominium | $437,600 | $400,000
November 16, 2022 |
| 1 Seal Harbor Rd 102 | 74_18_1102 | Residential Condominium | $437,100 | nominal ($1)
June 8, 2005 |
| 1 Seal Harbor Rd 103 | 74_18_1103 | Residential Condominium | $551,300 | $99,900
September 2, 1983 |
| 1 Seal Harbor Rd 104 | 74_18_1104 | Residential Condominium | $547,000 | $595,000
April 28, 2025 |
| 1 Seal Harbor Rd 105 | 74_18_1105 | Residential Condominium | $533,300 | $320,000
December 30, 2016 |
| 1 Seal Harbor Rd 106 | 74_18_1106 | Residential Condominium | $504,600 | $250,000
November 28, 2012 |
| 1 Seal Harbor Rd 107 | 74_18_1107 | Residential Condominium | $655,100 | nominal ($1)
January 2, 2024 |
| 1 Seal Harbor Rd 108 | 74_18_1108 | Residential Condominium | $677,900 | $245,000
August 29, 2014 |
| 1 Seal Harbor Rd 110 | 74_18_1110 | Residential Condominium | $474,400 | $136,000
February 15, 1989 |
| 1 Seal Harbor Rd 112 | 74_18_1112 | Residential Condominium | $440,800 | $165,000
November 15, 1999 |
| 1 Seal Harbor Rd 114 | 74_18_1114 | Residential Condominium | $604,900 | $385,000
July 28, 2017 |
| 1 Seal Harbor Rd 116 | 74_18_1116 | Residential Condominium | $609,500 | nominal ($1)
January 30, 1998 |
| 1 Seal Harbor Rd 201 | 74_18_1201 | Residential Condominium | $488,700 | $144,000
September 27, 1988 |
| 1 Seal Harbor Rd 202 | 74_18_1202 | Residential Condominium | $495,000 | $305,000
November 13, 2015 |
| 1 Seal Harbor Rd 203 | 74_18_1203 | Residential Condominium | $608,800 | $345,000
September 4, 2003 |
| 1 Seal Harbor Rd 204 | 74_18_1204 | Residential Condominium | $593,000 | $297,500
July 2, 2002 |
| 1 Seal Harbor Rd 205 | 74_18_1205 | Residential Condominium | $578,500 | $401,000
September 8, 2017 |
| 1 Seal Harbor Rd 206 | 74_18_1206 | Residential Condominium | $591,000 | nominal ($1)
March 4, 2021 |
| 1 Seal Harbor Rd 207 | 74_18_1207 | Residential Condominium | $861,400 | $585,000
May 6, 2022 |
| 1 Seal Harbor Rd 208 | 74_18_1208 | Residential Condominium | $846,200 | $470,000
September 30, 2013 |
| 1 Seal Harbor Rd 210 | 74_18_1210 | Residential Condominium | $505,700 | nominal ($1)
June 2, 2025 |
| 1 Seal Harbor Rd 211 | 74_18_1211 | Residential Condominium | $498,800 | nominal ($1)
May 6, 2021 |
| 1 Seal Harbor Rd 212 | 74_18_1212 | Residential Condominium | $501,100 | $399,000
August 22, 2019 |
| 1 Seal Harbor Rd 213 | 74_18_1213 | Residential Condominium | $512,100 | $312,750
August 8, 2013 |
| 1 Seal Harbor Rd 214 | 74_18_1214 | Residential Condominium | $596,000 | nominal ($1)
July 27, 1998 |
| 1 Seal Harbor Rd 215 | 74_18_1215 | Residential Condominium | $590,900 | $550,000
October 28, 2025 |
| 1 Seal Harbor Rd 216 | 74_18_1216 | Residential Condominium | $704,900 | $399,000
October 26, 2012 |
| 1 Seal Harbor Rd 300 | 74_18_1300 | Residential Condominium | $521,600 | $318,500
September 1, 2006 |
| 1 Seal Harbor Rd 301 | 74_18_1301 | Residential Condominium | $491,100 | $317,500
September 1, 2015 |
| 1 Seal Harbor Rd 302 | 74_18_1302 | Residential Condominium | $550,800 | nominal ($100)
June 13, 2024 |
| 1 Seal Harbor Rd 303 | 74_18_1303 | Residential Condominium | $559,200 | $204,000
March 23, 1999 |
| 1 Seal Harbor Rd 304 | 74_18_1304 | Residential Condominium | $567,200 | $432,500
October 21, 2020 |
| 1 Seal Harbor Rd 305 | 74_18_1305 | Residential Condominium | $658,600 | $380,000
August 18, 2014 |
| 1 Seal Harbor Rd 306 | 74_18_1306 | Residential Condominium | $547,200 | $269,000
November 9, 2011 |
| 1 Seal Harbor Rd 307 | 74_18_1307 | Residential Condominium | $895,500 | $540,000
June 25, 2014 |
| 1 Seal Harbor Rd 308 | 74_18_1308 | Residential Condominium | $742,000 | $450,000
July 23, 2020 |
| 1 Seal Harbor Rd 310 | 74_18_1310 | Residential Condominium | $529,300 | $275,000
September 13, 2012 |
| 1 Seal Harbor Rd 311 | 74_18_1311 | Residential Condominium | $503,500 | $425,000
August 20, 2020 |
| 1 Seal Harbor Rd 312 | 74_18_1312 | Residential Condominium | $476,800 | $101,900
November 30, 1983 |
| 1 Seal Harbor Rd 313 | 74_18_1313 | Residential Condominium | $615,900 | $401,000
January 10, 2017 |
| 1 Seal Harbor Rd 314 | 74_18_1314 | Residential Condominium | $601,800 | $519,000
March 31, 2022 |
| 1 Seal Harbor Rd 315 | 74_18_1315 | Residential Condominium | $606,100 | $303,000
March 30, 2004 |
| 1 Seal Harbor Rd 316 | 74_18_1316 | Residential Condominium | $698,100 | $724,900
July 31, 2025 |
| 1 Seal Harbor Rd 400 | 74_18_1400 | Residential Condominium | $480,600 | $88,900
December 9, 1983 |
| 1 Seal Harbor Rd 401 | 74_18_1401 | Residential Condominium | $486,300 | $300,000
June 3, 2016 |
| 1 Seal Harbor Rd 402 | 74_18_1402 | Residential Condominium | $550,800 | nominal ($100)
May 1, 2019 |
| 1 Seal Harbor Rd 403 | 74_18_1403 | Residential Condominium | $605,200 | $725,000
August 22, 2024 |
| 1 Seal Harbor Rd 404 | 74_18_1404 | Residential Condominium | $609,500 | $260,000
June 12, 2000 |
| 1 Seal Harbor Rd 405 | 74_18_1405 | Residential Condominium | $671,800 | $525,000
October 13, 2020 |
| 1 Seal Harbor Rd 406 | 74_18_1406 | Residential Condominium | $575,000 | $300,000
February 8, 2008 |
| 1 Seal Harbor Rd 407 | 74_18_1407 | Residential Condominium | $799,700 | $435,000
February 13, 2013 |
| 1 Seal Harbor Rd 408 | 74_18_1408 | Residential Condominium | $776,000 | $549,000
April 7, 2017 |
| 1 Seal Harbor Rd 410 | 74_18_1410 | Residential Condominium | $479,800 | $350,000
November 2, 2021 |
| 1 Seal Harbor Rd 411 | 74_18_1411 | Residential Condominium | $503,500 | nominal ($10)
April 10, 2014 |
| 1 Seal Harbor Rd 412 | 74_18_1412 | Residential Condominium | $514,900 | $370,000
June 14, 2018 |
| 1 Seal Harbor Rd 413 | 74_18_1413 | Residential Condominium | $614,200 | $510,000
October 29, 2021 |
| 1 Seal Harbor Rd 414 | 74_18_1414 | Residential Condominium | $691,300 | $620,000
June 3, 2024 |
| 1 Seal Harbor Rd 415 | 74_18_1415 | Residential Condominium | $588,000 | $543,000
March 2, 2026 |
| 1 Seal Harbor Rd 416 | 74_18_1416 | Residential Condominium | $821,600 | nominal ($1)
March 5, 2025 |
| 1 Seal Harbor Rd 500 | 74_18_1500 | Residential Condominium | $477,500 | nominal ($10)
August 29, 2019 |
What MassDEP has recorded
No tier-classified 21E site and no Activity and Use Limitation is mapped on this parcel.
What this means
- Assessed 6867% above the median residential condominium in Winthrop ($1,188,600, 251 parcels).
- The last sale price is 99% 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: Winthrop 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 1 Seal Harbor Rd PH03
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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Order the report