Miami-Dade County property record for 520 W Mashta Dr, Key Biscayne, FL 33149
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 5 ba · 3,544 sqft · built 1970 |
| Lot Size | 0.409 acres (17,810 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $122,470 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 24-5205-017-0090 |
| Primary APN | 24-5205-017-0090 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 5 Baths |
| Stories | 1 Story |
| Building Area | 3,544 sqft Living Area |
| Gross Area | 4,840 sqft |
| 1st Floor Area | 3,544 sqft |
| Flooring | Covered |
| Year Built | Built 1970 |
|---|---|
| Effective Year Built | Effective 1980 |
| Exterior Material | Composition |
| Construction Type | Concrete Block |
| Roof Type | Gable/Hip |
| Roof Material | Tile |
| Lot Area | 17,810 sqft (0.409 acres) |
| Patio Area | 1,554 sqft |
| Boat Access | Boat Access |
| Total Buildings | 2 Buildings |
| Street Address | 520 W MASHTA DR |
|---|---|
| City | KEY BISCAYNE |
| State | FL |
| Zip | 33149-1738 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | 2001 |
| Legal Description | 5 55 42 SMUGGLERS COVEPB 78-83 LOT 9 LOT SIZE17,810 SQ FT 75R 267114 |
| Legal Range | 42E |
| Legal Township | 55S |
| Legal Section | 05 |
| Legal Subdivision | SMUGGLERS COVE |
| Legal Block | 1 |
| Legal Lot Number | 9 |
| Jurisdiction | DADE FL |
| Township / Civil Division | KEY BISCAYNE |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 4602 |
520 W Mashta Dr is owned and occupied by an individual.
Source: Miami-Dade County records, as of October 21, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 520 W MASHTA DR, KEY BISCAYNE, FL 33149-1738 |
| 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.
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 520 W Mashta Dr was $122,470.
Source: Miami-Dade County assessment roll, as of October 21, 2026
| Type | Name |
|---|---|
| State | Florida |
| County | Miami-Dade County |
| Municipality | Key Biscayne Village |
| Unified School District | Dade County School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $122,470.00 | $6,869,237 | $7,862,400 Land $7,569,250 Building $293,150 |
| 2023 | $100,039.00 (+20.35%) | $6,888,692 (+8.95%) Land $6,358,170 Building $530,522 | $6,888,692 (+8.95%) Land $6,358,170 Building $530,522 |
| 2022 | $83,122.00 | $6,322,846 Land $5,788,250 Building $534,596 | $6,322,846 Land $5,788,250 Building $534,596 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 520 W 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 |
|
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 risk around 520 W 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 98% of the US · lower than 97.6% 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.
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 |
| 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.
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 |
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