Largest assessment increases in Mamaroneck Village, 2025 to 2026
Comparing the 2025 and 2026 rolls parcel by parcel, 1,689 Mamaroneck Village properties rose in assessed value, 50 fell, and 133 were essentially unchanged. This page lists the 50 largest increases by percentage.
A jump this size almost always has a specific cause: a completed renovation or addition, a teardown replaced by new construction, a subdivision, or a correction to a parcel the assessor had previously undervalued. A large increase is not by itself evidence of an error.
What makes an increase worth a second look is context. If your assessment rose sharply while comparable homes on your street barely moved, that gap is the thing to investigate — not the raw percentage. The median by street table shows what typical movement looked like near you, and grievance season in Westchester covers the deadlines and the process if you decide to challenge it.
Parcels assessed under $200,000 on the prior roll are excluded. At that end, percentage swings are usually reclassifications or data corrections rather than anything meaningful about a homeowner's bill.
| # | Address | Change | Full market value | Assessed | Est. annual tax |
|---|---|---|---|---|---|
| 1 | 1380 Flagler Dr | +213.3% | $4,700,000 | $4,700,000 | $106,936 |
| 2 | 883 Port Dr | +156.4% | $1,795,000 | $1,795,000 | $40,840 |
| 3 | 1310 Flagler Dr | +74.2% | $6,970,000 | $6,970,000 | $158,585 |
| 4 | 1010 Orienta Ave | +63.3% | $4,490,000 | $4,490,000 | $102,158 |
| 5 | 850 Rushmore Ave | +49.9% | $1,695,000 | $1,695,000 | $38,566 |
| 6 | 312 Prospect Ave | +43.7% | $1,480,000 | $1,480,000 | $33,673 |
| 7 | 1260 Flagler Dr | +40.1% | $5,324,000 | $5,324,000 | $121,134 |
| 8 | 1623 Winfield Ave | +38.3% | $755,000 | $755,000 | $17,178 |
| 9 | 1030 Seahaven Dr | +37.6% | $2,476,000 | $2,476,000 | $56,334 |
| 10 | 607 Prospect Ave | +35.1% | $1,005,000 | $1,005,000 | $22,866 |
| 11 | 155 Grand St | +31.9% | $720,000 | $720,000 | $16,382 |
| 12 | 823 Msgr Goodwine Ave | +31.6% | $658,000 | $658,000 | $14,971 |
| 13 | 1037 Orienta Ave | +28.3% | $4,170,000 | $4,170,000 | $94,878 |
| 14 | 1280 Flagler Dr | +26.9% | $4,870,000 | $4,870,000 | $110,805 |
| 15 | 889 Port Dr | +25.8% | $2,075,000 | $2,075,000 | $47,211 |
| 16 | 811 Hall St | +25.2% | $915,000 | $915,000 | $20,819 |
| 17 | 531 Rushmore Ave | +23.9% | $1,549,000 | $1,549,000 | $35,244 |
| 18 | 207 Grand St | +22.0% | $915,000 | $915,000 | $20,819 |
| 19 | 425 Soundview Ave | +21.9% | $1,180,000 | $1,180,000 | $26,848 |
| 20 | 410 Toni Ln | +21.9% | $1,850,000 | $1,850,000 | $42,092 |
| 21 | 1035 Nautilus Ln | +21.8% | $2,180,000 | $2,180,000 | $49,600 |
| 22 | 930 Protano Ln | +20.4% | $1,514,000 | $1,514,000 | $34,447 |
| 23 | 320 Bishop Ave | +19.7% | $1,052,000 | $1,052,000 | $23,936 |
| 24 | 602 Rockland Ave | +18.8% | $772,000 | $772,000 | $17,564 |
| 25 | 245 Mt Pleasant Ave | +18.5% | $1,160,000 | $1,160,000 | $26,394 |
| 26 | 215 Knollwood Ave | +18.1% | $1,105,000 | $1,105,000 | $25,142 |
| 27 | 728 Walton Ave | +17.9% | $1,670,000 | $1,670,000 | $37,997 |
| 28 | 886 Port Dr | +17.6% | $1,835,000 | $1,835,000 | $41,751 |
| 29 | 516 Munro Ave | +16.9% | $1,316,000 | $1,316,000 | $29,943 |
| 30 | 166 Maple Ave | +16.5% | $997,000 | $997,000 | $22,685 |
| 31 | 212 Heathcote Ave | +16.3% | $1,070,000 | $1,070,000 | $24,345 |
| 32 | 414 Claflin Ave | +16.0% | $2,615,000 | $2,615,000 | $59,498 |
| 33 | 5 Staub Ct | +15.1% | $678,000 | $678,000 | $15,427 |
| 34 | 960 Green Meadow Ln | +13.4% | $2,997,000 | $2,997,000 | $68,190 |
| 35 | 508 Palmer Ave | +13.0% | $1,378,000 | $1,378,000 | $31,353 |
| 36 | 616 Sylvan Ave | +12.7% | $2,160,000 | $2,160,000 | $49,146 |
| 37 | 820 Pirates Cv | +12.4% | $2,540,000 | $2,540,000 | $57,791 |
| 38 | 210 Warren Ave | +12.2% | $894,000 | $894,000 | $20,340 |
| 39 | 115 Waverly Ave | +11.7% | $917,000 | $917,000 | $20,865 |
| 40 | 535 Claflin Ave | +11.3% | $1,897,000 | $1,897,000 | $43,161 |
| 41 | 415 Claflin Ave | +11.0% | $3,220,000 | $3,220,000 | $73,263 |
| 42 | 711 Old Boston Post Rd | +10.8% | $1,026,000 | $1,026,000 | $23,344 |
| 43 | 815 Rushmore Ave | +10.8% | $2,240,000 | $2,240,000 | $50,966 |
| 44 | 1424 James St | +10.8% | $772,000 | $772,000 | $17,564 |
| 45 | 715 Old Boston Post Rd | +10.3% | $1,045,000 | $1,045,000 | $23,777 |
| 46 | 806 The Crescent | +10.1% | $2,145,000 | $2,145,000 | $48,804 |
| 47 | 205 Fulton Rd | +10.0% | $747,000 | $747,000 | $16,996 |
| 48 | 629 Cortlandt Ave | +9.2% | $1,328,000 | $1,328,000 | $30,215 |
| 49 | 510 Cortlandt Ave | +9.0% | $1,837,000 | $1,837,000 | $41,797 |
| 50 | 991 Green Meadow Ln | +7.7% | $2,030,000 | $2,030,000 | $46,188 |
Source: Mamaroneck Village 2026 assessment roll (SWIS 553203), compiled by Infarill LLC. Estimated taxes use county, school, and village mill rates for FY 2025-2026 village / 2026 town-county and exclude special district charges. Dale Ledger is unofficial and not affiliated with any municipality or school district — confirm on the Village of Mamaroneck.
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FAQ
Why did my Mamaroneck Village assessment go up in 2026?
Common causes are a completed renovation or addition, new construction, a subdivision, or a revaluation correcting a previously low assessment. The assessor's office can tell you which applies to your parcel.
Can I challenge an assessment increase?
Yes. New York has a formal grievance process with fixed annual deadlines. An increase alone is not grounds — the question is whether your assessment reflects market value relative to comparable properties.
Open Mamaroneck Village search
Unofficial. Confirm figures with the Village of Mamaroneck and the Town of Mamaroneck assessor before decisions. Town and school taxes may use the Town assessment, which can differ from the Village roll.