Blog · October 14, 2026 · Wisconsin
Sussex Plat Map, Wisconsin: plats and lots
Lots in Sussex trace back to recorded plats filed with the county.
Main page: Waukesha County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When a deed near Brookfield says lot and block, the Sussex plat map is where those numbers come from. What this Sussex guide covers: where to request a copy, plat versus tax map, and what to look for on the sheet.
Who keeps the Sussex plat map
For a lot in Sussex, look for the plat book reference on the parcel record; bring that to the recorder's office or its online index.
The viewer Waukesha County publishes
Your first stop is the Waukesha County parcel viewer; it covers every tax parcel in the county, Hartland included. When a rural tract has no street number, zoom in from Merton until the lines appear, then click inside the one you want. On ground around Pewaukee, the parcel card normally shows the owner of record, acreage on the tax roll, the parcel number and sometimes recent sales.
Deeds, plats and who keeps them
The map is an index, not the title: deeds, plats and easements for land near Lannon are kept by the Register of Deeds. Out toward Merton, have ready the instrument number shown in the record panel so staff can find the deed fast.
Offices that can help
If the acreage or value on a parcel near Hartland looks off belong with the county real property listing office, since that office keeps the assessment data. Questions about what you can build around Lannon go to planning, building or health offices, and the answer depends on jurisdiction.
Amended plats
Lots near Pewaukee can be combined or reconfigured by a replat, so check for later filings; street vacations near Brookfield show up in the records too.
Sussex, WI: the basics
Sussex is part of Waukesha County, Wisconsin, and the county assessor maps its lots. Out toward Pewaukee, city or town hall handles things like zoning, permits and utilities within town limits, but the county runs assessment and recording. Land beyond the city limits near Hartland usually follows county rules, not municipal ones.
Field tips
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Hartland, but coverage can be spotty out of town. A screenshot of the parcel near Lannon with its ID helps when you meet an owner or agent.
Neighboring parcel maps
Waukesha County touches Dodge County, Jefferson County, Milwaukee County, Ozaukee County, and Racine County, all with their own assessor records. Ground near Hartland that runs to the line can show up in two county records, so open the adjacent map too. Around Lannon, the Platbookmapper state page links every bordering county map across Wisconsin.
Reading the legal description
Wisconsin follows the Public Land Survey System, so rural legal descriptions near Hartland 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 Lannon can be irregular. Keep the legal description for land near Pewaukee for any title or survey request.
What the map can't tell you
Acreage on the record is an assessed number; only a licensed surveyor establishes the real corners for a parcel near Hartland. In and around Hartland, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Plat map vs. parcel map
The Waukesha County parcel viewer draws parcels for taxes, while the recorded plat is the legal document.
Places you'll see on the map
Waukesha is the county seat, which is where the courthouse records live. Smaller places on the map include Lannon, Merton, Pewaukee, and Menomonee Falls. About 412,591 people call Waukesha County home (Census estimate, 2023) across roughly 550 square miles.
Lots, blocks and easements
For a parcel near Hartland, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Metes and bounds instead
Rural land near Hartland that was never subdivided is often described by metes and bounds or survey description; look for a recorded survey for land there.
Ordering the Sussex plat map
In and around Hartland, many recorder offices offer an online index, otherwise call or visit with the reference; small fees are common.
Sussex: common questions
What does lot 7, block 3 mean near Menomonee Falls?
For property near Menomonee Falls, lot and block refer to a numbered lot within a block on a recorded subdivision plat.
Are old plats online near Pewaukee?
Good question; older plats near Merton may be on film or paper; call before you visit.
What do the dashed lines on a plat mean in Sussex?
On ground around Brookfield, dashed lines often mark easements or building lines; read the plat notes.
Is a plat map a survey for land near Hartland?
Usually, the plat near Pewaukee is recorded, while the GIS layer is an approximation.
Can I print the parcel map for land near Menomonee Falls?
Some viewers offer PDF export, and it's worth keeping the parcel ID visible for land near Menomonee Falls.
Open the official Waukesha 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.