Largest assessment increases in Ardsley, 2025 to 2026
Between the 2025 and 2026 rolls, 1,361 Ardsley properties went up in assessed value, 18 went down, and 7 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 | 88 Hilltop Rd | +133.5% | $1,326,200 | $1,326,200 | $43,075 |
| 2 | 11 Morningside Rd | +53.9% | $911,100 | $911,100 | $29,592 |
| 3 | 29 Plainview Ave | +43.8% | $1,212,800 | $1,212,800 | $39,392 |
| 4 | 36 Western Dr | +43.3% | $913,800 | $913,800 | $29,680 |
| 5 | 20 Grandview Ave | +38.4% | $907,600 | $907,600 | $29,479 |
| 6 | 3 Shady Rd | +32.1% | $1,262,900 | $1,262,900 | $41,018 |
| 7 | 41 Ridge Rd | +30.6% | $1,175,200 | $1,175,200 | $38,171 |
| 8 | 20 Victoria Rd | +29.6% | $1,069,200 | $1,069,200 | $34,727 |
| 9 | 19 Agnes Cir | +28.7% | $1,272,300 | $1,272,300 | $41,324 |
| 10 | 24 Western Dr | +28.6% | $948,700 | $948,700 | $30,813 |
| 11 | 60 Bramble Brook Rd | +25.7% | $1,342,200 | $1,342,200 | $43,594 |
| 12 | 38 Sheffield Ct | +24.8% | $809,800 | $809,800 | $26,302 |
| 13 | 5 Summit Ave | +24.6% | $1,300,800 | $1,300,800 | $42,249 |
| 14 | 182 Heatherdell Rd | +24.1% | $541,800 | $541,800 | $17,598 |
| 15 | 15 Plainview Ave | +23.4% | $1,326,700 | $1,326,700 | $43,091 |
| 16 | 8 Mill Ct | +23.1% | $693,300 | $693,300 | $22,518 |
| 17 | 124 Huntley Dr | +22.8% | $988,600 | $988,600 | $32,109 |
| 18 | 16 Victoria Rd | +22.8% | $947,600 | $947,600 | $30,778 |
| 19 | 19 Fairmont Ave | +22.6% | $888,900 | $888,900 | $28,872 |
| 20 | 19 Old Mill Ln | +22.6% | $764,300 | $764,300 | $24,825 |
| 21 | 4 Mill Ct | +22.6% | $806,500 | $806,500 | $26,194 |
| 22 | 6 Rockridge Rd | +22.4% | $1,230,200 | $1,230,200 | $39,956 |
| 23 | 23 Old Mill Ln | +22.3% | $772,200 | $772,200 | $25,082 |
| 24 | 12 Old Mill Ln | +22.2% | $752,200 | $752,200 | $24,431 |
| 25 | 11 Beacon Hill Rd | +22.1% | $1,245,400 | $1,245,400 | $40,450 |
| 26 | 22 Old Mill Ln | +22.1% | $781,000 | $781,000 | $25,367 |
| 27 | 21 Old Mill Ln | +22.0% | $816,800 | $816,800 | $26,529 |
| 28 | 3 Mill Ct | +21.8% | $745,700 | $745,700 | $24,221 |
| 29 | 14 Old Mill Ln | +21.8% | $767,900 | $767,900 | $24,941 |
| 30 | 34 Sheffield Ct | +21.7% | $768,800 | $768,800 | $24,971 |
| 31 | 29 Old Mill Ln | +21.7% | $731,800 | $731,800 | $23,769 |
| 32 | 28 Old Mill Ln | +21.7% | $782,400 | $782,400 | $25,412 |
| 33 | 25 Old Mill Ln | +21.6% | $859,200 | $859,200 | $27,907 |
| 34 | 11 Mill Ct | +21.6% | $688,600 | $688,600 | $22,365 |
| 35 | 39 Sheffield Ct | +21.3% | $805,500 | $805,500 | $26,162 |
| 36 | 31 Sheffield Ct | +21.2% | $791,400 | $791,400 | $25,705 |
| 37 | 6 Mill Ct | +21.2% | $753,800 | $753,800 | $24,483 |
| 38 | 15 Old Mill Ln | +20.8% | $785,500 | $785,500 | $25,513 |
| 39 | 154 Heatherdell Rd | +20.5% | $966,800 | $966,800 | $31,401 |
| 40 | 24 Old Mill Ln | +20.5% | $739,500 | $739,500 | $24,018 |
| 41 | 1 Mill Ct | +20.5% | $807,500 | $807,500 | $26,228 |
| 42 | 38 Ridge Rd | +19.7% | $815,800 | $815,800 | $26,497 |
| 43 | 11 Exeter Pl | +18.6% | $931,400 | $931,400 | $30,252 |
| 44 | 35 Sheffield Ct | +18.3% | $826,400 | $826,400 | $26,841 |
| 45 | 95 Ridge Rd | +18.3% | $1,233,800 | $1,233,800 | $40,073 |
| 46 | 21 Concord Rd | +18.1% | $1,288,500 | $1,288,500 | $41,850 |
| 47 | 611 Ashford Ave | +17.6% | $1,542,600 | $1,542,600 | $50,103 |
| 48 | 68 Lincoln Ave | +17.2% | $797,600 | $797,600 | $25,905 |
| 49 | 649 Ashford Ave | +17.0% | $1,607,900 | $1,607,900 | $52,224 |
| 50 | 17 Old Mill Ln | +16.8% | $775,000 | $775,000 | $25,172 |
Source: Ardsley 2026 assessment roll (SWIS 552601), 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 Ardsley.
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FAQ
Why did my Ardsley 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.
Unofficial. Confirm figures on the Village of Ardsley and the Town of Greenburgh assessor before you act on them.