Monroe County property record for 309 William St, Key West, FL 33040
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 860 sqft · built 1924 |
| Lot Size | 0.061 acres (2,650 sqft) |
| Owner | Company Name on File |
| Last Sale | $900,000 (Sep 2025) |
| Tax Bill | $5,794 (2024) |
| Deeds & Mortgages | Sep 2025 Transfer |
| Flood Zone | Zone AE (high risk) |
| APN | 00003170-000000 |
| Primary APN | 00003170-000000 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Stories | 1 Story |
| Building Area | 860 sqft Living Area |
| 1st Floor Area | 860 sqft |
| Flooring | Wood |
| Interior Walls | Wood |
| Year Built | Built 1924 |
|---|---|
| Effective Year Built | Effective 1975 |
| Exterior Material | Wood |
| Construction Type | Wood |
| Roof Type | Gable/Hip |
| Roof Material | Metal |
| Lot Area | 2,650 sqft (0.061 acres) |
| Lot Dimensions | 50 ft deep x 53 ft wide |
| Porch | Open Porch |
|---|---|
| Porch Area | 130 sqft |
| Deck Area | 40 sqft |
| Patio Area | 40 sqft |
| Cooling System | None |
|---|
| Account Number | 1003298 |
|---|---|
| Street Address | 309 WILLIAM ST |
| City | KEY WEST |
| State | FL |
| Zip | 33040-6845 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | HMDR |
| Legal Description | KW PT LOT 3 SQR 21 OR147-87 OR844-1796 OR3279-1749 OR3279-1750 OR3297-2101 OR3303-158 |
| Legal Range | 25E |
| Legal Township | 68S |
| Legal Section | 06 |
| Legal Subdivision | KEY WEST SQUARE 21 |
| Legal Lot Number | 3 |
| Jurisdiction | MONROE FL |
| Township / Civil Division | KEY WEST |
| Census Block Group | 1 |
| Census Block | 1010 |
| Census Tract | 972500 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Key West Historic District (Boundary Increase) listed 1983 · 2,494 contributing resources · NRIS 83001430 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
309 William St is owned by a company that bought it in September 2025.
Source: Monroe County records, as of December 8, 2025
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 1225 MCNUTT ST, HERCULANEUM, MO 63048-1517 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
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 | Name on Deed |
|---|---|
| Last Sale | Sep 9, 2025 · Amount on File |
| Deed Sale | Sep 9, 2025 · Amount on File |
| Prior Sale | Feb 12, 2025 · Amount on File |
| Deed Document Number | 20252514622 |
| Deed Book / Page | 3344 / 87 |
| Prior Transfer Date | Sep 8, 2025 |
| Prior Transfer Doc | 0033440087 |
| Record Updated | Oct 29, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | MONROE FL |
| Recording Date | Sep 9, 2025 |
| Property Address | 309 WILLIAM ST, KEY WEST, FL 33040-6845 |
| Document Number | 0033440087 |
| Book / Page | 3344 / 87 |
| Instrument Date | Sep 8, 2025 |
| Instrument | 2514622 |
| Transaction Type | Transfer |
| Record Updated | Sep 29, 2025 |
| Title Company | ACCOMODATION, ACCOMMODATION |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|---|
| Address | 23 WINDCASTLE DR, SAINT CHARLES, MO 63304-0446 |
| Name | Verified Name |
|---|---|
| Address | 1225 MCNUTT ST, HERCULANEUM, MO 63048-1517 |
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 | $1,218,863 (+77.48%) Land $1,119,095 Building $99,768 | $1,218,863 (+0.31%) Land $1,119,095 Building $99,768 | |
| 2024 | $5,794.00 (+312.09%) Homeowner's exemption | $686,755 (+346.57%) | $1,215,115 (+18.07%) Land $1,113,636 Building $101,479 |
| 2023 | $1,406.00 (+4.93%) Homeowner's exemption | $153,784 (+3%) | $1,029,168 (+25.66%) Land $933,489 Building $95,679 |
| 2022 | $1,340.00 Homeowner's exemption | $149,305 | $818,997 Land $723,318 Building $95,679 |
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.
FEMA maps place 309 William St in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective September 24, 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 | 7.0 ft |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 202 individual policies |
| Community Rating System | Class 5 (25% premium discount) |
| Nearby Flood Policies | 242 units insured incl. 40 condo units |
| Nearby Flood Claims | 400 (1978–2024) |
| Claims Outside the SFHA | 44 of 400 |
| Most Recent Claim | May 2024 · other causes |
| 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 309 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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