520 N Mashta Dr, Key Biscayne, FL 33149 Property Records

Miami-Dade County property record for 520 N Mashta Dr, Key Biscayne, FL 33149

Property Summary

Property Type	Single Family Home
Details	3 bd · 3 ba · 2,766 sqft · built 1963
Lot Size	0.23 acres (10,000 sqft)
Owner	2 Individual Names on File
Last Sale	$1,060,000 (Jul 2003)
Tax Bill	$27,437 (2025)
Deeds & Mortgages	Sep 2021 Mortgage
Flood Zone	Zone AE (high risk)
APN	`24-5205-009-0290`

Property Details

APN / Parcel Number

Primary APN	`24-5205-009-0290`

Interior

Bedrooms	3 Beds
Full Baths	3 Baths
Stories	1 Story
Building Area	2,766 sqft Living Area
Gross Area	3,499 sqft
1st Floor Area	2,766 sqft

Exterior

Year Built	Built 1963
Effective Year Built	Effective 1993
Exterior Material	Concrete Block/Hollow Tile/Frame
Construction Type	Concrete Block
Lot Area	10,000 sqft (0.23 acres)
Lot Dimensions	100 ft deep x 100 ft wide
Porch	Porch
Porch Area	292 sqft
Patio Area	766 sqft

Location & Zoning

Street Address	520 N MASHTA DR
City	KEY BISCAYNE
State	FL
Zip	33149-1719
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	2001
Legal Description	5-6 55 42 MASHTA ISLAND A REPLAT OF TRS A B & C PB 65-65 LOT 9 BLK 4 LOT SIZE100.000 X 100 OR 15002-1100 0491 1 COC 21386-1804 06 2003 1
Legal Range	42E
Legal Township	55S
Legal Section	05
Legal Subdivision	MASHTA ISLAND
Legal Tract	A
Legal Block	4
Legal Lot Number	9
Jurisdiction	DADE FL
Township / Civil Division	KEY BISCAYNE
Census Block Group	1
Census Block	1022
Census Tract	4602

Owner

520 N Mashta Dr is owned and occupied by two individuals who bought it in July 2003.

Source: Miami-Dade County records, as of October 21, 2026

Owner of Record	2 Individual Names on File
Mailing Address	520 N MASHTA DR, KEY BISCAYNE, FL 33149-1719
Occupancy	Owner Occupied
Owner Type	Individual

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jul 1, 2003 · Amount on File
Deed Sale	Jul 1, 2003 · Amount on File
Deed Document Number	2003441575
Deed Book / Page	21386 / 1804
Record Updated	Oct 29, 2026

September 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	DADE FL
Property Address	520 N MASHTA DR, KEY BISCAYNE, FL 33149-1719
Transaction Type	Mortgage
Record Updated	Apr 2, 2024

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	520 N MASHTA DR, KEY BISCAYNE, FL 33149-1719

Mortgage

Document Number	0000664262
Date	Sep 8, 2021
Book Page	32724/1638
Instrument	2021R0664262

Lender

Name	BANK OF AMERICA NA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Sep 1, 2051

Tax Assessment & Valuation

The 2025 property tax bill for 520 N Mashta Dr was $27,437 with a homeowner's exemption.

Source: Miami-Dade County assessment roll, as of October 21, 2026

Property Jurisdictions

Type	Name
State	Florida
County	Miami-Dade County
Municipality	Key Biscayne Village
Unified School District	Dade County School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$27,437.00 Homeowner's exemption	$1,695,952	$3,484,959 Land $3,100,000 Building $384,959
2023	$26,453.00 (+4.94%) Homeowner's exemption	$1,600,152 (+3%)	$3,212,837 (+33%) Land $2,850,000 Building $362,837
2022	$25,208.00 Homeowner's exemption	$1,553,546	$2,415,743 Land $2,050,000 Building $365,743

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

FEMA maps place 520 N Mashta Dr in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.

Source: FEMA National Flood Hazard Layer, effective January 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone AE high risk
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	10.0 ft
Flood Insurance Requirement	Required federally backed loans
Flood Insurance Cost	Premium on File median of 201 policies
Community Rating System	Class 8 (10% premium discount)
Nearby Flood Policies	201 in force
Nearby Flood Claims	312 (1979–2024)
Claims Outside the SFHA	1 of 312
Most Recent Claim	Jun 2024 · rainfall accumulation
Claims by Event	Hurricane Irma, Sep 2017 · 38 claims Hurricane Wilma, Oct 2005 · 26 claims Hurricane Andrew, Aug 1992 · 195 claims

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Wildfire risk around 520 N Mashta Dr is low, with a 0.01% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 96% of the US · lower than 96% of Florida
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	MDWASA - MAIN SYSTEM serves 2,377,460 people · EPA ID FL4130871
Water Source	Groundwater
Last State Inspection	Dec 2023
Lead	3 ppb (2023) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	6 last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 247 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber · Fixed Wireless · DSL	5,000 / 5,000
Xfinity Cable	2,000 / 250
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20