NANTUCKET COUNTY, MASSACHUSETTS · FY2024 ASSESSMENT SNAPSHOT
Nantucket County, Massachusetts property data
13,801 parcel records across the represented property classes and sizes. Recorded owner and property fields, enriched with FEMA flood mapping and school context. CSV + GeoJSON.
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FY2024 assessment snapshot. Imported March 2026; mapping enrichment September 22, 2026. The newer overlays do not refresh older ownership or assessment records.
CHECK THE FILE FIRST
Real records. Measured coverage.
13,801 records · 13,325 with owner names · 13,321 with tax mailing addresses.
13,793 valid geometries · 13,773 with at least 99.9% FEMA coverage · 13,793 with school context.
Download the free CSV sample Full coverage details
Across the full download: 2,643 parcels intersect a mapped high-risk flood area; 11 have unknown SFHA overlap. These five sample rows do not represent the full range of flood results.
Reading the flood fields: Mapped coverage is the share of the parcel covered by FEMA zone polygons; 100% coverage does not mean 100% high-risk flood area. SFHA overlap is the share in FEMA's mapped high-risk area (the 1%-annual-chance floodplain). Zone X can have different subtypes, shown when supplied. Missing mapping stays unknown; partial mapping leaves part of the parcel unassessed. A 0% SFHA overlap is not a guarantee against flooding. FEMA flood-hazard layer.
| Parcel / owner | Mapped acres / site | FEMA zone / subtype | High-risk overlap / mapping | School district |
|---|---|---|---|---|
| F_1000059_2574344LAFARGE TUCKERNUCK TRUST | 55.492TUCKERNUCK | Zone AE; VE; X0.2 PCT ANNUAL CHANCE FLOOD HAZARD; AREA OF MINIMAL FLOOD HAZARDFEMA source layer | SFHA: 55.013%Mapped coverage: 100%Mapping covers ≥99.9% | Nantucket School District |
| F_1000297_2570231TUCKERNUCK ASSOCIATES | 3.066TUCKERNUCK | Zone VE; XAREA OF MINIMAL FLOOD HAZARDFEMA source layer | SFHA: 10.983%Mapped coverage: 100%Mapping covers ≥99.9% | Nantucket School District |
| F_1000328_2570741CONGDON WILLIAM ETAL TRS | 3.032TUCKERNUCK | Zone XAREA OF MINIMAL FLOOD HAZARDFEMA source layer | SFHA: 0%Mapped coverage: 100%Mapping covers ≥99.9% | Nantucket School District |
| F_1000353_2571219SOUZA SHIRLEY & MANUAL F III | 2.918TUCKERNUCK | Zone XAREA OF MINIMAL FLOOD HAZARDFEMA source layer | SFHA: 0%Mapped coverage: 100%Mapping covers ≥99.9% | Nantucket School District |
| F_1000375_2571671MCGRATH WILLIAM F TRUSTEE | 2.976TUCKERNUCK | Zone XAREA OF MINIMAL FLOOD HAZARDFEMA source layer | SFHA: 0%Mapped coverage: 100%Mapping covers ≥99.9% | Nantucket School District |
Actual sample rows. Missing values are not inferred. Recorded owners are not verified title or an indication that the property is for sale.
IN YOUR DOWNLOAD
53 fields, with source notes.
CSV and matching GeoJSON, per-parcel enrichment evidence, coverage counts, provenance and methodology. Owner names, available tax mailing and property attributes, full-polygon FEMA overlays, school districts and nearest mapped active public-school distances. School virtual-status flags are preserved; a missing flag does not verify a physical campus.
13,295 records carry assessor zoning attributes. These are source attributes, not a current zoning overlay.
Each retained valid parcel representative point was checked against the Census county boundary with a 100-meter tolerance. Unrecoverable geometries remain null for spatial analysis. Where an import repeated an identical polygon ring, an explicitly recorded duplicate-ring recovery is documented in the methodology and evidence. This dated imported selection is not certified as the entire current assessor roll.
Read methodology and source conditions · View provenance
Dates and interpretation
Flood mapping does not certify absence of flooding. Nearest schools do not establish attendance. This research does not establish title, access, utilities, approved uses, vacancy, listing availability, project feasibility or investment results.
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13,801 records, fy2024 assessment snapshot, with September 2026 mapped context. Review sample and dates before purchase. No subscription.
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