Blog · October 14, 2026 · Wisconsin
Port Washington Plat Map: finding the recorded plat
Lots in Port Washington 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).
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Buying a lot in a subdivision near Fredonia? What you want is the Port Washington plat map, since it shows lots, streets and easements as approved. Covered here for Port Washington: where to request a copy, plat versus tax map, and the details that matter to buyers.
Getting started with the Port Washington plat map
For a lot in Port Washington, the deed usually cites the plat; bring that to the recorder's office or its online index.
The free map to start with
Go first to the Ozaukee County parcel viewer; it includes each tax parcel around Fredonia and Newburg. For land near Cedarburg, type a street address, an owner's name or a parcel number, and the matching parcel lights up. Out toward Belgium, write down the parcel ID while you have it open; every records desk in the county asks for it first.
Amended plats
Lots near Newburg can be combined or reconfigured by a replat, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
Getting your bearings
Port Washington holds the county offices, home to the main records offices. Other places on the map include Saukville, Grafton, Fredonia, and Cedarburg. About 93,460 people call Ozaukee County home (Census estimate, 2023) on some 233 square miles. Ozaukee County was organized in 1853, and some chains of title near Newburg are long. Landmarks such as Lake Michigan and Lion's Den Gorge Nature Preserve help you orient on the aerial around Grafton.
Neighboring parcel maps
Ozaukee County touches Muskegon County, MI, Oceana County, MI, Milwaukee County, Sheboygan County, and Washington County, and each of those keeps its own parcel map. Ground near Fredonia that runs to the line may be split in two county records, so look at the adjacent map too. For a home near Grafton, the Platbookmapper state page links each neighboring county map across Wisconsin.
City limits and county records
Port Washington lies within Ozaukee County, Wisconsin, which means parcel data comes from the county. Port Washington is also the county seat, so deeds and plats are filed in town. Local government in Port Washington handles matters such as zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Lots just outside the city limits out by Cedarburg often follows county rules instead.
Land outside a subdivision
Acreage around Saukville outside a subdivision may have no plat at all; the deed and any recorded survey describe it instead.
Reading the legal description
Wisconsin is laid out under the Public Land Survey System, which means a tract near Newburg is described by section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though sections near Saukville can be irregular. Keep the legal description for land near Saukville for any title or survey request.
Limits of the parcel data
Acreage on the record is an assessed number; just a licensed surveyor establishes the real boundary for a parcel near Cedarburg. Around Fredonia, records update in batches, so a deed recorded last month can take weeks to appear.
Plat map vs. parcel map
The tax map on the Ozaukee County parcel viewer is a summary, but the recorded plat is what the deed relies on.
Taking the map into the field
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Cedarburg, but coverage can be spotty out of town. A screenshot of the parcel near Fredonia with its ID keeps working without signal.
What a plat shows
Easements on the plat near Saukville stay with the land when it sells; read the notes on the sheet.
Which office to call
For assessment questions about property around Belgium go to the county real property listing office, since that office keeps the assessment data. Questions about what you can build around Saukville go to planning, building or health offices, depending on whether the land is inside town limits.
Online indexes and office visits
For a tract near Saukville, many recorder offices offer an online index, while others require a visit or a request; copy fees are usually small.
Deeds, plats and who keeps them
The map is an index, not the title: deeds, subdivision plats and easements for land near Saukville are filed with the Register of Deeds. For a parcel near Grafton, have ready the document number listed on the parcel record to skip a name search.
Port Washington: common questions
How far back do plats go near Newburg?
On ground around Belgium, it varies; some offices have scanned older plats and some haven't, including older subdivisions.
What do the dashed lines on a plat mean around Cedarburg?
If you're looking near Grafton, dashed lines often mark easements or building lines; read the plat notes.
Is the Port Washington plat map the same as the county GIS?
It depends, but the plat near Newburg is recorded, while the GIS layer is an approximation.
What is a lot and block description near Cedarburg?
It points to a spot on the plat for that subdivision near Saukville.
Which office handles records for land near Saukville?
For land near Grafton, assessment goes to the county real property listing office and deeds to the Register of Deeds; planning offices cover zoning near Cedarburg
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.