Miami-Dade County property record for 511 S Mashta Dr, Key Biscayne, FL 33149
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,903 sqft · built 1960 |
| Lot Size | 0.276 acres (12,000 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $14,829 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 24-5205-009-0310 |
| Primary APN | 24-5205-009-0310 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Stories | 1 Story |
| Building Area | 2,903 sqft Living Area |
| Gross Area | 2,961 sqft |
| 1st Floor Area | 2,903 sqft |
| Year Built | Built 1960 |
|---|---|
| Effective Year Built | Effective 1981 |
| Exterior Material | Concrete Block/Hollow Tile/Frame |
| Construction Type | Concrete Block |
| Lot Area | 12,000 sqft (0.276 acres) |
| Lot Dimensions | 100 ft deep x 120 ft wide |
| Patio Area | 377 sqft |
| Street Address | 511 S MASHTA DR |
|---|---|
| City | KEY BISCAYNE |
| State | FL |
| Zip | 33149-1732 |
| 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 11BLK 4 LOT SIZE119.990 X 100 OR 15162-3205 0891 1 |
| Legal Range | 42E |
| Legal Township | 55S |
| Legal Section | 05 |
| Legal Subdivision | MASHTA ISLAND |
| Legal Tract | A |
| Legal Block | 4 |
| Legal Lot Number | 11 |
| Jurisdiction | DADE FL |
| Township / Civil Division | KEY BISCAYNE |
| Census Block Group | 1 |
| Census Block | 1022 |
| Census Tract | 4602 |
Source: Miami-Dade County records, as of October 21, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 511 S MASHTA DR, KEY BISCAYNE, FL 33149-1732 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
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 | $14,829.00 (+3.79%) Homeowner's exemption | $884,847 (+5.99%) | $3,556,325 (+8.39%) Land $3,162,000 Building $394,325 |
| 2023 | $14,287.00 (+6.47%) Homeowner's exemption | $834,865 (+3%) | $3,281,087 (+32.95%) Land $2,907,000 Building $374,087 |
| 2022 | $13,419.00 Homeowner's exemption | $810,549 | $2,467,845 Land $2,091,000 Building $376,845 |
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 | Not rated no burnable land within 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 |
5G (outdoors only) and 4G LTE
Search by:
By searching, you agree to: Terms • Privacy • Disclosures