520 S Mashta Dr
Key Biscayne, FL 33149
$19,900,000Active · confirmed September 18, 2026 · listed 37 days ago · $6,451/sq ft
520 S Mashta Dr in Key Biscayne. 5 bed, 4 bath, 3,085 sq ft. Asking $19,900,000. Active listing facts, schools and neighborhood context on EuKreate.
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520 S Mashta Dr, Key Biscayne, FL 33149 and what is around it
Listed by Coldwell Banker Realty · Maureen Jauregui · MLS A12071221 · as of 2026-09-18
Beds
5
Baths
4
Sq ft
3,085
Built
1961
Property typeSingle Family
Lot size22,140 sq ft · 0.51 acres
Price per sq ftPrice per square footThe asking price divided by the home’s interior square footage. Compare it only with broadly similar homes; condition, lot, layout, and fees still matter.$6,451
ListedAug 17, 2026
CountyMiami-Dade
Listing typesale
Property summary
This 5-bedroom, 4-bath single family offers 3,085 sq ft.
Refined from listing-reported details
Listed by Coldwell Banker Realty · Maureen Jauregui · MLS A12071221 · as of 2026-09-18
How this compares in Key Biscayne
136 homes for sale, median asking $2,350,000, typically listed 96 days. See the Key Biscayne market
Active asking price only, not a sold price and not an appraisal. Check official sources before acting. Listing facts as of September 18, 2026.