Blog · October 14, 2026 · Missouri
Using the Clayton Plat Map
Lots in Clayton trace back to recorded plats filed with the county.
Main page: St. Louis County, MO GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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If a legal description for land in Clayton cites a lot number, look up the Clayton plat map it refers to. Covered here for Clayton: where to request a copy, plat versus tax map, and the details that matter to buyers.
Getting started with the Clayton plat map
For land around Hanley Hills, the deed or parcel record often names the subdivision and plat reference; that makes the request quick.
Getting to the right map
Parcels around Maplewood can be looked up on the St. Louis County ArcGIS parcel map, free to use and open without a login. Without an address in hand, zoom in from Hanley Hills until the lines appear, then click inside the one you want. Near Wellston, the record panel normally shows the owner of record, acreage on the tax roll, a parcel ID and often a sale date.
City limits and county records
Clayton lies within St. Louis County, Missouri, which means parcel data comes from the county. As the county seat, Clayton hosts the courthouse, which puts the Recorder of Deeds close by. For land near Maplewood, city or town hall handles matters such as zoning, permits and utilities within town limits, while the county keeps the tax map. Land beyond the city limits near Wellston generally answers to county rules instead.
How land is described here
Missouri uses the Public Land Survey System, so deeds around Hanley Hills reference sections and townships. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though sections near Hanley Hills can be irregular. Copy the legal description from the record for the parcel near Hanley Hills when you talk to a surveyor.
Metes and bounds instead
Acreage around Pagedale outside a subdivision is often described by metes and bounds or survey description; the deed and any recorded survey describe it instead.
Field tips
Most viewers work in a phone browser, which helps when you're standing on land near Wellston, though signal can drop in rural spots. A screenshot of the parcel near Maplewood with its ID keeps working without signal.
Before you lean on the lines
Tax maps are drawn for assessment, not measured on the ground, so a fence near Pagedale may sit several feet off the line on screen. Out toward Brentwood, records update in batches, so a deed recorded last month can take weeks to appear.
Recorded documents worth pulling
For anything that matters, request the recorded deed from the Recorder of Deeds; the parcel map near Pagedale only summarizes it. Long-held tracts near Hanley Hills may trace back through several deeds, so a title company earns its fee before a purchase.
Two different maps
When the two disagree for a lot near Richmond Heights, the recorded plat and a survey control.
Neighboring parcel maps
St. Louis County touches Madison County, IL, Monroe County, IL, St. Clair County, IL, Franklin County, and Jefferson County; every one of them runs a separate parcel map. A tract near the line by Richmond Heights may show up across two assessors' files, so check the adjacent map as well. For a parcel near Wellston, the Platbookmapper state page lists each neighboring county map for Missouri.
Getting your bearings
Clayton holds the county offices, which is where the courthouse records live. You'll also find Richmond Heights, Brentwood, Maplewood, and Pagedale. Around 987,059 people call St. Louis County home (Census Bureau estimate, 2023) on about 508 square miles. St. Louis County dates to 1812, and some chains of title near Wellston are long. Features like Spanish Lake Park and Babler State Park are easy to spot when you zoom out from Hanley Hills.
Replats and vacations
An amended plat may change lots around Pagedale, search the index for replats of the same subdivision; street vacations show up in the records too.
Who handles what
If the acreage or value on a parcel near Maplewood looks off are handled by the County Assessor, the office behind the parcel record. Questions about what you can build around Wellston go to planning, building or health offices, and the answer depends on jurisdiction.
Details on the Clayton plat map
Utility or drainage strips on a lot in this town limit where you can build or fence; check the plat notes and any covenants around Bellefontaine Neighbors.
Getting a copy
Closer to Maplewood, many recorder offices offer an online index, otherwise call or visit with the reference; copy fees are usually small.
Frequently asked
Is a plat map a survey near Richmond Heights?
On ground around Richmond Heights, GIS parcels are tax drawings, and the recorded plat is the legal document; trust the plat when they differ.
What is a lot and block description for land near Richmond Heights?
Generally, it points to a spot on the plat for that subdivision near Maplewood; the deed names the subdivision.
Where are historic plats for Clayton?
In most cases, older plats near Hanley Hills may be on film or paper; call before you visit.
What do the dashed lines on a plat mean in Clayton?
For acreage around Brentwood, dashed lines often mark easements or building lines, so check before you build.
Can I download parcel lines near Maplewood?
Some viewers offer PDF export, and it's worth keeping the parcel ID visible for land near Richmond Heights.
Open the official St. Louis County, MO 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.