Miami-Dade County property record for 421 S Mashta Dr, Key Biscayne, FL 33149
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4 ba · 4,536 sqft · built 1980 |
| Lot Size | 0.422 acres (18,418 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $4,050,000 (Jun 2005) |
| Tax Bill | $67,356 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 24-5205-017-0130 |
| Primary APN | 24-5205-017-0130 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4 Baths |
| Stories | 2 Stories |
| Building Area | 4,536 sqft Living Area |
| Gross Area | 5,434 sqft |
| Flooring | Vinyl/Resilient |
| Year Built | Built 1980 |
|---|---|
| Exterior Material | Concrete Block |
| Construction Type | Concrete |
| Lot Area | 18,418 sqft (0.422 acres) |
| Garage Area | 363 sqft |
| Patio Area | 1,865 sqft |
| Fence | Fence |
| Greenhouse | 202 sqft |
| Street Address | 421 S MASHTA DR |
|---|---|
| City | KEY BISCAYNE |
| State | FL |
| Zip | 33149-1731 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | 2001 |
| Legal Description | 5 55 42 SMUGGLERS COVE PB 78-83 LOT 13 LOT SIZE 18,418 SQ FT OR 11955-1336 1083 1 COC 23936-0340 10 2005 5 |
| Legal Range | 42 |
| Legal Township | 55 |
| Legal Section | 05 |
| Legal Subdivision | SMUGGLERS COVE |
| Legal Lot Number | 13 |
| Jurisdiction | DADE FL |
| Township / Civil Division | KEY BISCAYNE |
| Census Block Group | 1 |
| Census Block | 1004 |
| Census Tract | 4602 |
Source: Miami-Dade County records, as of February 13, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 421 S MASHTA DR, CORAL GABLES, FL 33134 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jun 10, 2005 · Amount on Record |
| Deed Sale | Jun 10, 2005 · Amount on Record |
| Prior Sale | Jun 10, 2005 · Amount on Record |
| Deed Document Number | 0000602136 |
| Deed Book / Page | 23465 / 0123 |
| Last Transfer Date | Nov 7, 2005 |
| Transfer Doc | 0001152974 |
| Record Updated | Jun 8, 2026 |
Source: Miami-Dade County assessment roll, as of July 1, 2025
| 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 | $67,356.00 (+3.69%) Homeowner's exemption | $4,240,639 (+5.99%) | $9,374,379 (+3%) Land $8,748,550 Building $625,829 |
| 2023 | $64,956.00 (+4.42%) Homeowner's exemption | $4,001,095 (+3%) | $7,211,165 (+8.82%) Land $6,575,226 Building $635,939 |
| 2022 | $62,209.00 Homeowner's exemption | $3,884,559 | $6,626,894 Land $5,985,850 Building $641,044 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 Record 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.
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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