Monroe County property record for 528 William St, Key West, FL 33040
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3.5 ba · 3,338 sqft · built 1933 |
| Lot Size | 0.102 acres (4,455 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $3,550,000 (Jun 2024) |
| Tax Bill | $25,029 (2025) |
| Deeds & Mortgages | Jun 2026 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 00008530-000000 |
| Primary APN | 00008530-000000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Stories | 4 Stories |
| Building Area | 3,338 sqft Living Area |
| 1st Floor Area | 2,618 sqft |
| Attic | Attic |
| Attic Area | 1,380 sqft |
| Flooring | Wood |
| Interior Walls | Wallboard/Drywall |
| Year Built | Built 1933 |
|---|---|
| Effective Year Built | Effective 2013 |
| Exterior Material | Other |
| Roof Type | Gable/Hip |
| Roof Material | Metal |
| Lot Area | 4,455 sqft (0.102 acres) |
| Lot Dimensions | 99 ft deep x 45 ft wide |
| Pool Area | 70 sqft |
|---|---|
| Porch | Open Porch |
| Porch Area | 526 sqft |
| Patio Area | 378 sqft |
| Water Feature | Water Feature |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Electric |
| Account Number | 1008796 |
|---|---|
| Street Address | 528 WILLIAM ST |
| City | KEY WEST |
| State | FL |
| Zip | 33040-6856 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | HHDR |
| Legal Description | KW PT LOT 1 SQR 48 OR293-154 OR640-387 OR696-334 OR1767-1175 OR1860-1771 OR2109-872 OR2170-1386 OR2466-2398 OR2644-1145 OR2648-72 OR2651-1632 OR3280-765 |
| Legal Range | 25E |
| Legal Township | 68S |
| Legal Section | 06 |
| Legal Subdivision | KEY WEST SQUARE 48 |
| Legal Lot Number | 1 |
| Jurisdiction | MONROE FL |
| Township / Civil Division | KEY WEST |
| Census Block Group | 3 |
| Census Block | 3002 |
| Census Tract | 972400 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Key West Historic District listed 1971 · 189 contributing resources · NRIS 71000245 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: Monroe County records, as of August 6, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 99 E NECK RD, HUNTINGTON, NY 11743-1567 |
| Owner Type | Company |
| Vesting | Trust, Revocable Living Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 12, 2024 · Amount on Record |
| Deed Sale | Jun 12, 2024 · Amount on Record |
| Prior Sale | May 21, 2010 |
| Deed Document Number | 20242464933 |
| Deed Book / Page | 3280 / 765 |
| Last Transfer Date | Jun 3, 2026 |
| Transfer Doc | 0002547147 |
| Record Updated | Oct 29, 2026 |
| Document Type | Warranty Deed |
|---|---|
| Jurisdiction | MONROE FL |
| Recording Date | Jun 11, 2026 |
| Property Address | 528 WILLIAM ST, KEY WEST, FL 33040-6856 |
| Document Number | 0002547147 |
| Book / Page | 3385 / 2159 |
| Instrument Date | Jun 3, 2026 |
| Instrument | 20262547147 |
| Transaction Type | Transfer |
| Record Updated | Aug 30, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Living Trust |
| Address | 99 E NECK RD, HUNTINGTON, NY 11743-1567 |
Source: Monroe County assessment roll, as of December 8, 2025
| Type | Name |
|---|---|
| State | Florida |
| County | Monroe County |
| Municipality | Key West City |
| Unified School District | Monroe County School District (PK - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $25,029.00 (+78.65%) | $2,974,489 (+81.88%) Land $1,490,465 Building $1,484,024 | $2,974,489 (+8.65%) Land $1,490,465 Building $1,484,024 |
| 2024 | $14,010.00 (+1.55%) | ||
| 2023 | $13,796.00 (+4.43%) Homeowner's exemption | $1,635,437 (+3%) | $2,737,698 (+15.73%) Land $1,277,672 Building $1,460,026 |
| 2022 | $13,211.00 Homeowner's exemption | $1,587,803 | $2,365,547 Land $968,072 Building $1,397,475 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
Source: FEMA National Flood Hazard Layer, effective September 24, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 285 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 328 units insured incl. 43 condo units |
| Nearby Flood Claims | 89 (1980–2025) |
| Claims Outside the SFHA | 43 of 89 |
| Most Recent Claim | Oct 2025 · 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: FCC Broadband Data Collection, based on 922 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Hotwire Communications.
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