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591 N Mashta Drive, Key Biscayne, FL 33149

Single family property built in 1960 with 4,934 sq ft of living area on a 0.35-acre lot in Key Biscayne, Miami-Dade County. Facts below come from the county property appraiser's public record.

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County just value (tax roll) — not a market value
$8,275,489
County assessed value (tax roll)
$8,275,489
Living area
4,934 sq ft
Lot size
0.35 acres (15,184 sq ft)
Year built
1960
Land use
Single family
FEMA flood zone
Not on file yet
County
Miami-Dade County, FL
Parcel ID
fl-23-2452050090040

At a glance

Who owns 591 N Mashta Dr?
Miami-Dade County property records list GUSISA LTD as the owner of record.
What is the county just value of 591 N Mashta Dr?
$8,275,489 on the Miami-Dade County tax roll (as of January 1). Just value is the property appraiser's figure for property taxes — not a market value.
What is the parcel ID?
fl-23-2452050090040 (Miami-Dade County).

Current owner

Owner contact info

Phones, emails and mailing addresses from public Florida records are available to members.

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More on N Mashta Dr

All 41 properties on N Mashta Dr · ZIP 33149 (Key Biscayne). Values are county just values (tax roll), not market values.

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Source: Florida Department of Revenue parcel roll; data refreshed Jun 25, 2026. Values are county tax-roll figures, not appraisals. How to read these values · Data sources