420 S Mashta Dr, Key Biscayne, FL 33149
420 S Mashta Dr, Key Biscayne, FL 33149: 5,746 sq ft living area, 0.43 acre lot, built 1989, single family, county just value $13,043,760 (tax roll). Miami-Dade County record: parcel map.
- Parcel ID: fl-23-2452050170160
- County: Miami-Dade County, FL
- Land use: Single family
- Lot size: 0.43 acres (18,860 sq ft)
- Living area: 5,746 sq ft
- Year built: 1989
- County just value (tax roll) — not a market value: $13,043,760
- County assessed value (tax roll): $13,043,760
- FEMA flood zone: Not on file yet
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Source: Florida county property appraiser public records and FEMA NFHL; data refreshed Jun 25, 2026. Values are county tax-roll figures, not appraisals.