Blog · October 14, 2026 · Illinois
Using the Lockport Plat Map
Lots in Lockport trace back to recorded plats filed with the county.
Main page: Will County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Checking easements on a house in Lockport? What you want is the Lockport plat map, because the recorded plat shows how the land was divided. Covered here for Lockport: where plats are filed, how a plat differs from a parcel map, and what to look for on the sheet.
Tracking down the Lockport plat map
For a subdivision near Homer Glen, the deed or parcel record often names the subdivision and plat reference; that makes the request quick.
The free map to start with
Your first stop is the Will County parcel viewer; it includes every tax parcel from Crest Hill to Bolingbrook. For land near Lemont, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. If you're looking near Homer Glen, the record panel typically gives the owner of record, acreage on the tax roll, the parcel number and often a sale date.
When a parcel crosses a boundary
Will County borders Cook County, DuPage County, Grundy County, Kankakee County, and Kendall County, all with their own assessor records. A tract near the line by Romeoville can be split in two county records, so check the adjacent map too. For property near Bolingbrook, our state page lists every bordering county map for Illinois.
Lockport and the county around it
Lockport sits in Will County, Illinois, which means parcel data comes from the county. In and around Crest Hill, the municipality handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Land beyond the city limits toward New Lenox usually answers to county rules rather than the town's.
When a plat changes
Lots near Crest Hill can be combined or reconfigured by a replat, search the index for replats of the same subdivision; street vacations show up in the records too.
Plat map vs. parcel map
Where lines don't match in Lockport, go with the plat and a surveyor's work.
Will County in a few facts
Joliet serves as the county seat, where most land records are kept. You'll also find Homer Glen, Crest Hill, Romeoville, and Lemont, each with its own cluster of lots. Around 700,728 people call Will County home (Census Bureau estimate, 2023) spread over roughly 836 square miles. Will County dates to 1836, and some chains of title near Crest Hill are long. Features like Channahon State Park help you orient on the aerial around New Lenox.
What the map can't tell you
Listed acreage is a tax-roll number; just a licensed surveyor sets the real lines on land around Homer Glen. If you're looking near New Lenox, records update in batches, so a deed recorded last month can take weeks to appear.
Lots, blocks and easements
On ground around Homer Glen, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Reading the legal description
Illinois uses the Public Land Survey System, so rural legal descriptions near Lemont cite section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though corrections make some sections near New Lenox odd-sized. Keep the legal description for land near Romeoville before you request a deed or survey.
Requesting the plat
Out toward New Lenox, some counties put plat images online, while others require a visit or a request; copy fees are usually small.
Offices that can help
Questions about value or the owner field for land near Lemont are handled by the Supervisor of Assessments, working with township assessors, which maintains the tax roll. Zoning, permits and septic questions near Romeoville go to planning, building or health offices, town or county, depending on location.
Land outside a subdivision
Acreage around Crest Hill outside a subdivision is often described by metes and bounds or survey description; look for a recorded survey for land near New Lenox.
The paper trail behind a parcel
When the details count, get the recorded deed through the county Recorder of Deeds (in many counties the County Clerk and Recorder); the parcel map near Crest Hill only summarizes it. Around Homer Glen, have ready the book and page shown in the record panel so staff can find the deed fast.
On site with the map
The parcel map usually runs in a mobile browser, useful out on a road near New Lenox, but coverage can be spotty out of town. A screenshot of the parcel near New Lenox with its ID keeps working without signal.
Questions about the Lockport plat map
What do the dashed lines on a plat mean around Lemont?
Building on an easement near New Lenox is generally restricted, so check before you build.
Is a plat map a survey around Crest Hill?
For most people, the plat near Lemont is recorded, while the GIS layer is an approximation; trust the plat when they differ.
Are old plats online around Homer Glen?
Good question; the county Recorder of Deeds (in many counties the County Clerk and Recorder) can say what's available; call before you visit.
How do I get a copy of a plat in Lockport?
Generally, copies come from the county Recorder of Deeds (in many counties the County Clerk and Recorder), often through an online index; small copy fees are common.
Is the parcel map a survey for land near Romeoville?
The map near Homer Glen is approximate; a survey sets the real corners
Open the official Will 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.