Miami-Dade County property record for 524 Warren Ln, Key Biscayne, FL 33149
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,700 sqft · built 1950 |
| Lot Size | 0.187 acres (8,136 sqft) |
| Owner | Individual Name on File |
| Last Sale | $2,050,000 (Apr 2015) |
| Tax Bill | $22,265 (2025) |
| Deeds & Mortgages | Jul 2026 Construction Loan Sep 2025 Line of Credit |
| Flood Zone | Zone AE (high risk) |
| APN | 24-4232-004-0220 |
| Primary APN | 24-4232-004-0220 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Stories | 1 Story |
| Building Area | 2,700 sqft Living Area |
| Gross Area | 2,740 sqft |
| 1st Floor Area | 2,700 sqft |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1980 |
| Exterior Material | Concrete Block/Hollow Tile/Frame |
| Construction Type | Concrete Block |
| Lot Area | 8,136 sqft (0.187 acres) |
| Lot Dimensions | 100 ft deep x 81.4 ft wide |
| Porch | Porch |
| Porch Area | 13 sqft |
| Patio Area | 600 sqft |
| Street Address | 524 WARREN LN |
|---|---|
| City | KEY BISCAYNE |
| State | FL |
| Zip | 33149-1827 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | 0100 |
| Legal Description | TROPICAL ISLE HOMES SUB 1ST ADDN PB 50-72 LOT 28BLK 3 LOT SIZE 81.360 X 100 OR 9816-2200 |
| Legal Range | 42E |
| Legal Township | 54S |
| Legal Section | 32 |
| Legal Subdivision | TROPICAL ISLE HOMES SUB 1ST ADDN |
| Legal Block | 3 |
| Legal Lot Number | 28 |
| Jurisdiction | DADE FL |
| Township / Civil Division | KEY BISCAYNE |
| Census Block Group | 3 |
| Census Block | 3013 |
| Census Tract | 4602 |
524 Warren Ln is owned and occupied by an individual who bought it in April 2015.
Source: Miami-Dade County records, as of October 21, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 524 WARREN LN, KEY BISCAYNE, FL 33149-1827 |
| 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.
| Date | Document |
|---|---|
| Jul 6, 2026 | Deed of Trust, Mortgage · Construction Mortgage LENDSURE MORTGAGE CORPORATION |
| Sep 12, 2025 | Deed of Trust, Mortgage · Line of Credit VALLEY BANK |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 20, 2015 · Amount on File |
| Deed Sale | Apr 20, 2015 · Amount on File |
| Deed Document Number | 2015251845 |
| Deed Book / Page | 29584 / 1498 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | DADE FL |
| Recording Date | Jul 6, 2026 |
| Property Address | 524 WARREN LN, KEY BISCAYNE, FL 33149-1827 |
| Document Number | 0000456799 |
| Book / Page | 35383 / 1377 |
| Instrument Date | Jun 22, 2026 |
| Instrument | 2026456799 |
| Transaction Type | Mortgage |
| Record Updated | Jul 27, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Name | Verified Name |
|---|---|
| Address | 524 WARREN LN, KEY BISCAYNE, FL 33149-1827 |
| Document Number | 0000456799, |
|---|---|
| Date | Jul 6, 2026 |
| Book Page | 35383/1377 |
| Instrument | 2026456799 |
| Name | LENDSURE MORTGAGE CORPORATION |
|---|
| Type | Construction Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 12 Months |
| Due | Jun 21, 2027 |
| Rate Type | Balloon |
|---|---|
| Rate | 6.51% |
| Initial Type | Balloon |
| Max Rate | -1% |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | DADE FL |
| Property Address | 524 WARREN LN, KEY BISCAYNE, FL 33149-1827 |
| Transaction Type | Mortgage |
| Record Updated | Oct 2, 2025 |
| Name | Verified Name |
|---|---|
| Address | 524 WARREN LN, KEY BISCAYNE, FL 33149-1827 |
| Document Number | 0000695886 |
|---|---|
| Date | Sep 12, 2025 |
| Book Page | 34938/4223 |
| Instrument | 2025R0695886 |
| Name | VALLEY BANK |
|---|---|
| Type | Bank |
| Address | WAYNE, NJ 07470 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly |
The 2025 property tax bill for 524 Warren Ln was $22,265 with a homeowner's exemption.
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 | $22,265.00 Homeowner's exemption | $1,361,221 | $2,484,737 Land $2,115,360 Building $369,377 |
| 2023 | $21,447.00 (+5.45%) Homeowner's exemption | $1,284,330 (+3%) | $2,107,931 (+25.87%) Land $1,871,280 Building $236,651 |
| 2022 | $20,338.00 Homeowner's exemption | $1,246,923 | $1,674,659 Land $1,436,004 Building $238,655 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 524 Warren Ln 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 489 individual policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 548 units insured incl. 59 condo units |
| Nearby Flood Claims | 790 (1979–2021) |
| Most Recent Claim | Oct 2021 · 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.
The area around 524 Warren Ln has no burnable land within ember reach, so its wildfire risk is not rated.
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 533 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Verizon.
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