Monroe County property record for 508 William St, Key West, FL 33040
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,127 sqft · built 1933 |
| Lot Size | 0.076 acres (3,346 sqft) |
| Owner | Trust Name on File |
| Last Sale | $1,270,000 (Feb 2011) |
| Tax Bill | $10,035 (2024) |
| Flood Zone | Zone X (minimal risk) |
| APN | 00008650-000000 |
| Primary APN | 00008650-000000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Stories | 2 Stories |
| Building Area | 1,127 sqft Living Area |
| 1st Floor Area | 1,127 sqft |
| Flooring | Wood |
| Interior Walls | Wood |
| Year Built | Built 1933 |
|---|---|
| Effective Year Built | Effective 2012 |
| Exterior Material | Other |
| Roof Type | Gable/Hip |
| Roof Material | Metal |
| Lot Area | 3,346 sqft (0.076 acres) |
| Lot Dimensions | 67 ft deep x 50 ft wide |
| Pool Area | 190 sqft |
|---|---|
| Porch | Open Porch |
| Porch Area | 378 sqft |
| Patio Area | 588 sqft |
| Fence | Fence |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air |
| Account Number | 1008915 |
|---|---|
| Old Parcel Number | 01010100008650000000 |
| Street Address | 508 WILLIAM ST |
| City | KEY WEST |
| State | FL |
| Zip | 33040-6856 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | KW PT LOT 2 SQR 48 G12-261 OR164-172/73 OR326-502/03 OR812-1849 OR977-249 OR1290-2038/40 OR1536-572 OR1887-655/56 |
| Legal Range | 25E |
| Legal Township | 68S |
| Legal Section | 06 |
| Legal Subdivision | SQUARE 48 |
| Legal Lot Number | 2 |
| 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.
508 William St is owner-occupied and held in a trust since February 2011.
Source: Monroe County records, as of December 5, 2025
| Owner of Record | Trust Name on File |
|---|---|
| Co-owner | Co-owner on File |
| Mailing Address | 508 WILLIAM ST, KEY WEST, FL 33040-6856 |
| Occupancy | Owner Occupied |
| Owner Type | Individual, Secondary Company |
| Vesting | Trust |
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 | 2 Names on Deed |
|---|---|
| Last Sale | Feb 9, 2011 · Amount on File |
| Deed Sale | Feb 9, 2011 · Amount on File |
| Prior Sale | Jul 10, 2003 · Amount on File |
| Deed Document Number | 1823466 |
| Deed Book / Page | 2503 / 2309 |
| Record Updated | Jun 8, 2026 |
Source: Monroe County assessment roll, as of July 1, 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 | $1,236,627 | $2,217,293 Land $1,337,845 Building $879,448 | |
| 2024 | $10,035.00 (+1.6%) | ||
| 2023 | $9,877.00 (+4.45%) Homeowner's exemption | $1,166,773 (+3%) | $1,989,366 (+14.96%) Land $1,146,841 Building $842,525 |
| 2022 | $9,456.00 Homeowner's exemption | $1,132,790 | $1,730,541 Land $868,943 Building $861,598 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 508 William St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 File 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.
The area around 508 William St 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: 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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