Blog · October 14, 2026 · Florida
Using the Key West Plat Map
Lots in Key West trace back to recorded plats filed with the county.
Main page: Monroe County, FL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When a deed near Layton says lot and block, the Key West plat map is where those numbers come from. What this Key West guide covers: where plats are filed, plat versus tax map, and what to look for on the sheet.
Getting started with the Key West plat map
For a subdivision near Marathon, the deed or parcel record often names the subdivision and plat reference; bring that to the recorder's office or its online index.
Pulling up a parcel
Begin with the Monroe County qPublic map; it includes each assessed parcel in the county, Layton included. For property near Layton, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. With a lot near Marathon, the parcel card usually lists the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
Key West, FL: the basics
Key West lies within Monroe County, Florida, so its parcels are on the county's map. The city is also the county seat, so deeds and plats are filed in town around Islamorada. In and around Key Colony Beach, the municipality handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Lots just outside the city limits toward Layton often falls under county rules rather than the town's.
What the map can't tell you
Listed acreage is a tax-roll number; just a licensed surveyor can set the real corners for a parcel near Marathon. For acreage around Islamorada, records update in batches, so a deed recorded last month might lag behind.
Recorded plat or GIS layer
The tax map on the Monroe County qPublic map is a summary, whereas the plat carries surveyed dimensions.
Reading the plat sheet
Easements on the plat near Key Colony Beach can block a shed or pool; check the plat notes and any covenants.
Where the recorded documents are
The map is an index, not the title: deeds, subdivision plats and easements for land near Layton are filed with the Clerk of the Circuit Court (official records). Older tracts around Layton may trace back through a long string of deeds, so a title company is worth hiring before a purchase.
Next door to Monroe County
Monroe County borders Collier County and Miami-Dade County; every one of them runs a separate parcel map. Acreage along the edge near Marathon may be split in two county records, so look at the neighboring map before you assume the acreage. For acreage around Key Colony Beach, our state page links each bordering county map for Florida.
Ordering the Key West plat map
In and around Marathon, some counties put plat images online, while others require a visit or a request; copy fees are usually small.
When there's no plat
Rural land near Key Colony Beach that was never subdivided is often described by metes and bounds or survey description; look for a recorded survey for land there.
On site with the map
Most viewers work in a phone browser, which helps when you're standing on land near Key Colony Beach, but coverage can be spotty out of town. A saved image of the lot near Marathon and its lines keeps working without signal.
Places you'll see on the map
Key West is the county seat, which is where the courthouse records live. Other places on the map include Marathon, Key Colony Beach, Layton, and Islamorada, each with its own cluster of lots. Around 80,614 people live in Monroe County (Census Bureau estimate, 2023) spread over some 983 square miles. Monroe County was organized in 1823, which matters when you trace an old farm's title. Features like Florida Bay and Everglades National Park help you orient on the aerial around Marathon.
Which office to call
Recorded documents for a parcel near Islamorada are with the Clerk of the Circuit Court (official records), sometimes only in person. Zoning, permits and septic questions near Islamorada are for the local planning and health departments, town or county, depending on location.
Replats and vacations
Lots near Marathon can be combined or reconfigured by a replat, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
Sections, lots and bearings
Florida uses the Public Land Survey System, so deeds around Marathon reference sections and townships. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though real sections near Key Colony Beach vary in size. Write down the legal description for the tract near Key Colony Beach when you talk to a surveyor.
Frequently asked
Are old plats online in Key West?
The Clerk of the Circuit Court (official records) can say what's available; call before you visit.
How do I read lot and block in Key West?
If the land is near Marathon, the description sends you to a specific recorded plat, so pull that plat for dimensions.
What do the dashed lines on a plat mean in Key West?
If you're looking near Key Colony Beach, dashed lines often mark easements or building lines, so check before you build.
Is a plat map a survey around Layton?
For land near Key Colony Beach, GIS parcels are tax drawings, and the recorded plat is the legal document; trust the plat when they differ.
Can I download parcel lines near Islamorada?
Most viewers have a print or export tool, and it's worth keeping the parcel ID visible for land near Key Colony Beach.
Open the official Monroe County, FL parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.