Largest assessment increases in Mamaroneck Village, 2025 to 2026
Between the 2025 and 2026 rolls, 1,689 Mamaroneck Village properties went up in assessed value, 50 went down, and 133 stayed about the same. This page lists the 50 biggest increases by percentage.
Increases this large usually come from a finished renovation or addition, a teardown replaced by new construction, a subdivision, or a correction to a parcel the assessor had valued too low. A big increase alone does not mean the assessment is wrong.
If your assessment rose sharply and similar homes on your street barely changed, ask the assessor why. The median by street table shows how much a typical home on each street changed. Grievance season in Westchester covers the deadlines and the process if you decide to challenge your assessment.
Parcels with a full market value under $200,000 on the prior roll are left out. At that size, a large percentage change is usually a reclassification or a data correction.
| # | Address | Change | Full market value | Assessed | Est. annual tax |
|---|---|---|---|---|---|
| 1 | 1380 Flagler Dr | +213.3% | $4,700,000 | $4,700,000 | $106,291 |
| 2 | 883 Port Dr | +156.4% | $1,795,000 | $1,795,000 | $40,594 |
| 3 | 1310 Flagler Dr | +74.2% | $6,970,000 | $6,970,000 | $157,626 |
| 4 | 1010 Orienta Ave | +63.3% | $4,490,000 | $4,490,000 | $101,542 |
| 5 | 850 Rushmore Ave | +49.9% | $1,695,000 | $1,695,000 | $38,332 |
| 6 | 312 Prospect Ave | +43.7% | $1,480,000 | $1,480,000 | $33,470 |
| 7 | 1260 Flagler Dr | +40.1% | $5,324,000 | $5,324,000 | $120,402 |
| 8 | 1623 Winfield Ave | +38.3% | $755,000 | $755,000 | $17,074 |
| 9 | 1030 Seahaven Dr | +37.6% | $2,476,000 | $2,476,000 | $55,994 |
| 10 | 607 Prospect Ave | +35.1% | $1,005,000 | $1,005,000 | $22,728 |
| 11 | 155 Grand St | +31.9% | $720,000 | $720,000 | $16,283 |
| 12 | 823 Msgr Goodwine Ave | +31.6% | $658,000 | $658,000 | $14,880 |
| 13 | 1037 Orienta Ave | +28.3% | $4,170,000 | $4,170,000 | $94,304 |
| 14 | 1280 Flagler Dr | +26.9% | $4,870,000 | $4,870,000 | $110,136 |
| 15 | 889 Port Dr | +25.8% | $2,075,000 | $2,075,000 | $46,926 |
| 16 | 811 Hall St | +25.2% | $915,000 | $915,000 | $20,693 |
| 17 | 531 Rushmore Ave | +23.9% | $1,549,000 | $1,549,000 | $35,031 |
| 18 | 207 Grand St | +22.0% | $915,000 | $915,000 | $20,693 |
| 19 | 425 Soundview Ave | +21.9% | $1,180,000 | $1,180,000 | $26,686 |
| 20 | 410 Toni Ln | +21.9% | $1,850,000 | $1,850,000 | $41,838 |
| 21 | 1035 Nautilus Ln | +21.8% | $2,180,000 | $2,180,000 | $49,301 |
| 22 | 930 Protano Ln | +20.4% | $1,514,000 | $1,514,000 | $34,239 |
| 23 | 320 Bishop Ave | +19.7% | $1,052,000 | $1,052,000 | $23,792 |
| 24 | 602 Rockland Ave | +18.8% | $772,000 | $772,000 | $17,458 |
| 25 | 245 Mt Pleasant Ave | +18.5% | $1,160,000 | $1,160,000 | $26,234 |
| 26 | 215 Knollwood Ave | +18.1% | $1,105,000 | $1,105,000 | $24,990 |
| 27 | 728 Walton Ave | +17.9% | $1,670,000 | $1,670,000 | $37,767 |
| 28 | 886 Port Dr | +17.6% | $1,835,000 | $1,835,000 | $41,499 |
| 29 | 516 Munro Ave | +16.9% | $1,316,000 | $1,316,000 | $29,762 |
| 30 | 166 Maple Ave | +16.5% | $997,000 | $997,000 | $22,547 |
| 31 | 212 Heathcote Ave | +16.3% | $1,070,000 | $1,070,000 | $24,197 |
| 32 | 414 Claflin Ave | +16.0% | $2,615,000 | $2,615,000 | $59,139 |
| 33 | 5 Staub Ct | +15.1% | $678,000 | $678,000 | $15,333 |
| 34 | 960 Green Meadow Ln | +13.4% | $2,997,000 | $2,997,000 | $67,777 |
| 35 | 508 Palmer Ave | +13.0% | $1,378,000 | $1,378,000 | $31,163 |
| 36 | 616 Sylvan Ave | +12.7% | $2,160,000 | $2,160,000 | $48,848 |
| 37 | 820 Pirates Cv | +12.4% | $2,540,000 | $2,540,000 | $57,442 |
| 38 | 210 Warren Ave | +12.2% | $894,000 | $894,000 | $20,218 |
| 39 | 115 Waverly Ave | +11.7% | $917,000 | $917,000 | $20,739 |
| 40 | 535 Claflin Ave | +11.3% | $1,897,000 | $1,897,000 | $42,900 |
| 41 | 415 Claflin Ave | +11.0% | $3,220,000 | $3,220,000 | $72,820 |
| 42 | 711 Old Boston Post Rd | +10.8% | $1,026,000 | $1,026,000 | $23,203 |
| 43 | 815 Rushmore Ave | +10.8% | $2,240,000 | $2,240,000 | $50,657 |
| 44 | 1424 James St | +10.8% | $772,000 | $772,000 | $17,458 |
| 45 | 715 Old Boston Post Rd | +10.3% | $1,045,000 | $1,045,000 | $23,633 |
| 46 | 806 The Crescent | +10.1% | $2,145,000 | $2,145,000 | $48,510 |
| 47 | 205 Fulton Rd | +10.0% | $747,000 | $747,000 | $16,894 |
| 48 | 629 Cortlandt Ave | +9.2% | $1,328,000 | $1,328,000 | $30,033 |
| 49 | 510 Cortlandt Ave | +9.0% | $1,837,000 | $1,837,000 | $41,544 |
| 50 | 991 Green Meadow Ln | +7.7% | $2,030,000 | $2,030,000 | $45,908 |
Source: Mamaroneck Village 2026 assessment roll (SWIS 553203), compiled by Infarill LLC. Estimated taxes use county, school, and village mill rates for fiscal year 2026 town & county / 2026-27 village / 2026-27 school and leave out special district charges. Dale Ledger is unofficial and is not affiliated with any municipality or school district. Check figures with the Village of Mamaroneck.
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FAQ
Why did my Mamaroneck Village assessment go up in 2026?
Common causes are a finished renovation or addition, new construction, a subdivision, or a correction to an assessment that was too low. The assessor's office can tell you which one applies to your parcel.
Can I challenge an assessment increase?
Yes. New York has a formal grievance process with set yearly deadlines. An increase on its own is not grounds for a grievance. The question is whether your assessment is too high compared with similar properties.
Open Mamaroneck Village search
Unofficial. Confirm figures with the Village of Mamaroneck and the Town of Mamaroneck assessor before you act on them. Town and school taxes may use the Town assessment, which can differ from the Village roll.