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316 William St, Key West, FL 33040 Property Records

Monroe County property record for 316 William St, Key West, FL 33040

Property Summary

Property TypeSingle Family Home
Details3 bd · 2 ba · 1,436 sqft · built 1933
Lot Size0.088 acres (3,869 sqft)
OwnerIndividual Name on File
Last Sale$1,200,000 (Feb 2021)
Tax Bill$13,096 (2024)
Deeds & MortgagesFeb 2021 Sale & Mortgage
Flood ZoneZone AE (high risk)
APN00003510-000000

Property Details

APN / Parcel Number

Primary APN00003510-000000
Alternative APNs
  • 01010100003510000000
  • 1003646

Interior

Bedrooms3 Beds
Full Baths2 Baths
Stories2 Stories
Building Area1,436 sqft Living Area
1st Floor Area1,156 sqft
Attic Area572 sqft
FlooringWood
Interior WallsWood

Exterior

Year BuiltBuilt 1933
Effective Year BuiltEffective 2007
Exterior MaterialWood
Foundation TypeBlock
Roof TypeGable/Hip
Roof MaterialMetal
Lot Area3,869 sqft (0.088 acres)
Lot Dimensions93 ft deep x 29 ft wide

Exterior Amenities

Pool Area288 sqft
PorchOpen Porch
Porch Area254 sqft
Patio Area883 sqft
FenceFence

Utilities, Heating & Cooling

Cooling SystemHVAC
Heating SystemForced Air

Location & Zoning

Account Number1003646
Old Parcel Number01010100003510000000
Street Address316 WILLIAM ST
CityKEY WEST
StateFL
Zip33040-6846
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionKW PT LOT 2 SQR 22 OR173-135/36 OR465-291/92 OR448-113/14 OR1672-954/55 OR1672-952/53 OR1914-626/27 OR1914-629/36 OR1914-638
Legal Range25E
Legal Township68S
Legal Section06
Legal SubdivisionKEY WEST SQUARE 22
Legal Lot Number2
JurisdictionMONROE FL
Township / Civil DivisionKEY WEST
Census Block Group1
Census Block1009
Census Tract972500

Historic Designation

Source: NPS National Register of Historic Places, as of August 1, 2026

Historic DistrictWithin 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.

Owner

316 William St is owned by an individual who bought it in February 2021.

Source: Monroe County records, as of December 5, 2025

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of RecordIndividual Name on File
Co-ownerCo-owner on File
Mailing Address2069 E US HIGHWAY 6, MARSEILLES, IL 61341-9610
Owner TypeIndividual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleFeb 2, 2021 · Amount on File
Deed SaleFeb 2, 2021 · Amount on File
Prior SaleDec 29, 2016 · Amount on File
Deed Document Number2302216
Deed Book / Page3072 / 2462
Record UpdatedJun 8, 2026

February 2021: Warranty Deed, Transfer

Document TypeWarranty Deed
JurisdictionMONROE FL
Recording DateFeb 2, 2021
Property Address316 WILLIAM ST, KEY WEST, FL 33040-6846
Document Number0030722462
Book / Page3072 / 2462
Instrument DateJan 29, 2021
Instrument2302216
Transaction TypeTransfer
Record UpdatedDec 21, 2021
Title CompanyATTORNEY

Transaction

AmountAmount on Record
DownpaymentDownpayment on Record
Loan-to-Value (LTV)LTV on Record
Tax$8,400.00
Amount AccuracyFull Amount Stated
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name
Address2235 SOTA WAY, 2235, SEBASTOPOL, CA 95472-9047

Transferred To (Grantee/Buyer)

NameVerified Name
Address2069 E US HIGHWAY 6, MARSEILLES, IL 61341-9610

Mortgage

Document Number0030722467
DateFeb 2, 2021
Instrument3072/2467
Lender
NameFLAGSTAR BANK FSB
TypeBank
Agreement
TypeConventional Mortgage
AmountAmount on Record
Term360 Months
DueFeb 1, 2051

Tax Assessment & Valuation

Source: Monroe County assessment roll, as of July 1, 2025

Property Jurisdictions

TypeName
StateFlorida
CountyMonroe County
MunicipalityKey West City
Unified School DistrictMonroe County School District (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2025$1,692,344 (+16.18%) Land $1,411,798 Building $280,546$1,692,344 (+16.18%) Land $1,411,798 Building $280,546
2024$13,096.00 (+10.14%)
2023$11,890.00 (+15.02%)$1,456,672 (+21.55%) Land $1,177,646 Building $279,026$1,456,672 (+21.55%) Land $1,177,646 Building $279,026
2022$10,337.00$1,198,446 Land $912,504 Building $285,942$1,198,446 Land $912,504 Building $285,942

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

FEMA maps place 316 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 ZoneZone AE
high risk
100-Year FloodplainYes
1% annual chance
FloodwayNo
Base Flood Elevation6.0 ft
Flood Insurance RequirementRequired
federally backed loans
Flood Insurance CostPremium on File
median of 202 individual policies
Community Rating SystemClass 5 (25% premium discount)
Nearby Flood Policies242 units insured
incl. 40 condo units
Nearby Flood Claims400 (1978–2024)
Claims Outside the SFHA44 of 400
Most Recent ClaimMay 2024 · other causes
Claims by Event
  • Hurricane Irma, Sep 2017 · 92 claims
  • Hurricane Wilma, Nov 2005 · 117 claims
  • Hurricane Georges, Oct 1998 · 57 claims

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.

Wildfire

The area around 316 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 RiskNot rated
no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Internet Providers

Source: FCC Broadband Data Collection, based on 922 locations within half a mile, as of December 31, 2025

ProviderMax 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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