Blog · October 14, 2026 · Wisconsin
Reading the Cedarburg Plat Map for a lot
A recorded plat shows how land near Grafton was divided into lots.
Main page: Ozaukee County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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If a legal description for land in Cedarburg cites a lot number, look up the Cedarburg plat map it refers to. Covered here for Cedarburg: where plats are filed, plat versus tax map, and the details that matter to buyers.
The Cedarburg plat map: start here
For a lot in Cedarburg, the deed or parcel record often names the subdivision and plat reference; that makes the request quick.
The free map to start with
Go first to the Ozaukee County parcel viewer; it includes every assessed parcel in the county, Grafton included. For property near Grafton, type a street address, an owner's name or a parcel number, and the viewer zooms to the match. In and around Saukville, the record panel typically gives the owner of record, assessed acreage, the parcel number and in many cases the last transfer.
Where Cedarburg fits in
The town lies within Ozaukee County, Wisconsin, which means parcel data comes from the county, at least around Fredonia. Local government in Cedarburg handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Acreage past the city limits near Thiensville generally follows county rules instead.
Recorded documents worth pulling
The map is an index, not the title: recorded deeds, plats and easements for land near Mequon sit with the Register of Deeds. For a tract near Saukville, have ready the book and page shown in the record panel so staff can find the deed fast.
Getting answers from the right desk
If the acreage or value on a parcel near Port Washington looks off are handled by the county real property listing office, since that office keeps the assessment data. Zoning, permits and septic questions near Thiensville are for the local planning and health departments, town or county, depending on location.
Plat map vs. parcel map
The Ozaukee County parcel viewer draws parcels for taxes, while the recorded plat is the legal document.
How land is described here
Wisconsin follows the Public Land Survey System, so rural legal descriptions near Bayside cite section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though real sections near Thiensville vary in size. Keep the legal description for land near Bayside when you talk to a surveyor.
Using it on a phone
The parcel map usually runs in a mobile browser, useful out on a road near Mequon, but coverage can be spotty out of town. A saved image of the lot near Thiensville and its lines helps when you meet an owner or agent.
Details on the Cedarburg plat map
If you're looking near Mequon, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Land on the county line
Ozaukee County touches Muskegon County, MI, Oceana County, MI, Milwaukee County, Sheboygan County, and Washington County, all with their own assessor records. Ground near Port Washington that runs to the line can be split in two county records, so check the adjacent map before you assume the acreage. With a lot near Thiensville, the Platbookmapper state page lists every neighboring county map across Wisconsin.
Places you'll see on the map
Port Washington serves as the county seat, which is where the courthouse records live. You'll also find Grafton, Thiensville, Mequon, and Saukville, where town lots give way to larger tracts. Roughly 93,460 people live in Ozaukee County (Census Bureau estimate, 2023) across roughly 233 square miles. Ozaukee County was organized in 1853, and some chains of title near Mequon are long. Features like Lake Michigan and Lion's Den Gorge Nature Preserve are easy to spot when you zoom out from Bayside.
When there's no plat
Rural land near Grafton that was never subdivided may have no plat at all; the deed and any recorded survey describe it instead.
A word on accuracy
Listed acreage is an estimate; only a licensed surveyor can set the real lines for a parcel near Thiensville. Out toward Bayside, records update in batches, so a deed recorded last month might lag behind.
Replats and vacations
An amended plat may change lots around Grafton, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
Requesting the plat
For a parcel near Saukville, some counties put plat images online, while others require a visit or a request; copy fees are usually small.
Frequently asked
What does lot 7, block 3 mean near Mequon?
Good question; it points to a spot on the plat for that subdivision near Port Washington.
Where are historic plats for Cedarburg?
Usually, older plats near Port Washington may be on film or paper; call before you visit.
How do I get a copy of a plat around Port Washington?
It depends, but recorded plats near Grafton are filed with the Register of Deeds; use the plat reference from the deed or parcel record.
What is a replat in Cedarburg?
In most cases, combining or splitting lots near Bayside usually needs a recorded plat change; ask staff about the process.
Does the parcel map work on a phone in Cedarburg?
The map near Grafton usually works on a phone; screenshots help offline.
Open the official Ozaukee County, WI 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.