Blog · October 14, 2026 · Illinois
Morris Plat Map: finding the recorded plat
A recorded plat shows how land near Diamond was divided into lots.
Main page: Grundy County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When a deed near Diamond says lot and block, look up the Morris plat map it refers to. In this Morris guide: where to request a copy, plat versus tax map, and what to look for on the sheet.
Who keeps the Morris plat map
For land around Diamond, the deed usually cites the plat; that makes the request quick.
Getting to the right map
Your first stop is the Grundy County parcel viewer; it maps each assessed parcel from Mazon to Minooka. In and around Diamond, type a street address, an owner's name or a parcel number, and the viewer zooms to the match. For land near Minooka, copy the parcel ID before closing the panel; each office in the county uses it to find the file.
When a plat changes
An amended plat may change lots around Coal City, search the index for replats of the same subdivision; street vacations near Mazon show up in the records too.
City limits and county records
Morris lies within Grundy County, Illinois, so its parcels are on the county's map. Morris is also the county seat, which puts the county Recorder of Deeds (in many counties the County Clerk and Recorder) close by. If the land is near Carbon Hill, City or town hall handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Lots just outside the city limits toward Diamond usually follows county rules rather than the town's.
Using it on a phone
Most viewers work in a phone browser, which helps when you're standing on land near Minooka, but coverage can be spotty out of town. A printout of the tract near Coal City keeps working without signal.
Sections, lots and bearings
Illinois follows the Public Land Survey System, so deeds around Mazon reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though real sections near Diamond vary in size. Keep the legal description for land near Minooka when you talk to a surveyor.
Land outside a subdivision
Rural land near Coal City that was never subdivided may have no plat at all; the deed and any recorded survey describe it instead.
Recorded plat or GIS layer
The tax map on the Grundy County parcel viewer is a summary, whereas the plat carries surveyed dimensions.
Which office to call
Anything recorded against property around Mazon are with the county Recorder of Deeds (in many counties the County Clerk and Recorder), often with an online index. Building or septic questions for a lot near Coal City are for the local planning and health departments, and the answer depends on jurisdiction.
Before you lean on the lines
Tax maps are drawn for assessment, not measured on the ground, so a tree line near Coal City can sit several feet off the line on screen. For land near Mazon, records update in batches, so a deed recorded last month might lag behind.
Next door to Grundy County
Grundy County borders Kankakee County, Kendall County, LaSalle County, Livingston County, and Will County, and each of those keeps its own parcel map. A tract near the line by Minooka may be split across two assessors' files, so check the neighboring map as well. In and around Minooka, our state page lists every bordering county map across Illinois.
Reading the plat sheet
Easements on the plat near Diamond stay with the land when it sells; check the plat notes and any covenants.
Getting your bearings
Morris holds the county offices, home to the main records offices. Other places on the map include Minooka, Carbon Hill, Channahon, and Mazon. Around 53,578 people call Grundy County home (Census Bureau estimate, 2023) spread over roughly 418 square miles. Grundy County was formed in 1841, and some chains of title near Carbon Hill are long.
The paper trail behind a parcel
The map is an index, not the title: recorded deeds, subdivision plats and easements covering ground around Diamond are kept by the county Recorder of Deeds (in many counties the County Clerk and Recorder). For a tract near Minooka, have ready the document number listed on the parcel record so staff can find the deed fast.
Requesting the plat
In and around Minooka, some counties put plat images online, while others require a visit or a request; small fees are common.
Questions about the Morris plat map
What is a lot and block description around Carbon Hill?
For most people, it points to a spot on the plat for that subdivision near Mazon; the deed names the subdivision.
What is a replat around Coal City?
For most people, lot splits in Morris go through the planning office.
What do the dashed lines on a plat mean around Carbon Hill?
For land near Minooka, dashed lines often mark easements or building lines, so check before you build.
Is a plat map a survey near Minooka?
For a home near Channahon, GIS parcels are tax drawings, and the recorded plat is the legal document; trust the plat when they differ.
What's a legal description in Morris?
For property near Carbon Hill, Deeds use lot and block, metes and bounds or survey descriptions, and the parcel record often summarizes it.
Open the official Grundy County, IL 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.