Blog · October 17, 2026 · Wisconsin
Bayside Plat Map, Wisconsin: plats and lots
Lots in Bayside trace back to recorded plats filed with the county.
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 Bayside cites a lot number, you'll need the Bayside plat map to make sense of it. In this Bayside guide: where to request a copy, plat versus tax map, and the details that matter to buyers.
Who keeps the Bayside plat map
For a subdivision near Port Washington, the deed or parcel record often names the subdivision and plat reference; bring that to the recorder's office or its online index.
The free map to start with
Your first stop is the Ozaukee County parcel viewer; it covers each assessed parcel in the county, Grafton included. For land near Grafton, put in a street address, an owner's name or a parcel number, and the viewer zooms to the match. Closer to Thiensville, write down the parcel ID from that panel; each office in the county will want it.
When a parcel crosses a boundary
For acreage around Saukville, Ozaukee County borders Muskegon County, MI, Oceana County, MI, Milwaukee County, Sheboygan County, and Washington County, all with their own assessor records. A tract near the line by Thiensville may show up across two assessors' files, so look at the adjacent map before you assume the acreage. With a lot near Cedarburg, the Platbookmapper state page links every bordering county map across Wisconsin.
Using it on a phone
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Port Washington, though signal can drop in rural spots. A printout of the tract near Thiensville keeps working without signal.
Bayside, WI: the basics
Bayside sits in Ozaukee County, Wisconsin, which means parcel data comes from the county. Closer to Cedarburg, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, but the county runs assessment and recording. Lots just outside the town limits out by Thiensville often falls under county rules rather than the town's.
How a plat differs from the tax map
The tax map on the Ozaukee County parcel viewer is a summary, while the recorded plat is the legal document.
Details on the Bayside plat map
Closer to Grafton, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
What the map can't tell you
Acreage on the record is an assessed number; only a licensed surveyor can set the real boundary for a parcel near Port Washington. For land near Port Washington, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Getting your bearings
Port Washington is the county seat, home to the main records offices. Smaller places on the map include Thiensville, Mequon, Cedarburg, and Grafton. About 93,460 people live in Ozaukee County (Census estimate, 2023) spread over roughly 233 square miles. Ozaukee County dates to 1853, and some chains of title near Saukville are long. Features like Lake Michigan and Lion's Den Gorge Nature Preserve help you orient on the aerial around Cedarburg.
Metes and bounds instead
Acreage around Cedarburg outside a subdivision may have no plat at all; the deed and any recorded survey describe it instead.
Replats and vacations
An amended plat may change lots around Cedarburg, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
Getting a copy
With a lot near Grafton, many recorder offices offer an online index, otherwise call or visit with the reference; small fees are common.
Legal descriptions in Wisconsin
Wisconsin follows the Public Land Survey System, so rural legal descriptions near Port Washington cite section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though sections near Port Washington can be irregular. Copy the legal description from the record for the parcel near Cedarburg before you request a deed or survey.
Where the recorded documents are
For anything that matters, request the recorded deed through the Register of Deeds; the parcel map near Saukville only summarizes it. Long-held tracts around Cedarburg can trace back through many deeds, and a title company can sort it out on a real sale.
Getting answers from the right desk
If the acreage or value on a parcel near Grafton looks off are handled by the county real property listing office, since that office keeps the assessment data. Questions about what you can build around Port Washington are for the local planning and health departments, depending on whether the land is inside town limits.
Quick answers
What is a replat near Grafton?
For most people, combining or splitting lots near Grafton usually needs a recorded plat change.
Are old plats online in Bayside?
In most cases, older plats near Thiensville may be on film or paper.
What is a lot and block description for land near Grafton?
Usually, it points to a spot on the plat for that subdivision near Mequon; the deed names the subdivision.
What do the dashed lines on a plat mean for land near Port Washington?
For a parcel near Mequon, dashed lines often mark easements or building lines, so check before you build.
Is there a way to export the map around Grafton?
Use the print button or a screenshot, and it's worth keeping the parcel ID visible for land near Saukville.
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.