Blog · October 14, 2026 · Washington
Kennewick Plat Map, Washington: plats and lots
A recorded plat shows how land near Prosser was divided into lots.
Main page: Benton County, WA 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.
When a listing near Prosser mentions a lot number, you'll need the Kennewick plat map to make sense of it. In this Kennewick guide: where to request a copy, plat versus tax map, and the details that matter to buyers.
The Kennewick plat map: start here
For land around Richland, look for the plat book reference on the parcel record; bring that to the recorder's office or its online index.
Where the parcel data lives
Property in and around Benton City appear on the Benton County parcel viewer, free to use and open without a login. Around West Richland, put in a street address, an owner's name or a parcel number, and the viewer zooms to the match. If you're looking near Prosser, write down the parcel ID from that panel; each office in the county uses it to find the file.
A word on accuracy
Acreage on the record is a tax-roll number; just a licensed surveyor can set the real corners on land around Benton City. For property near Prosser, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Kennewick, WA: the basics
Kennewick is part of Benton County, Washington, so its parcels are on the county's map. On ground around Richland, City or town hall handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Acreage past the town limits toward Prosser usually answers to county rules, not municipal ones.
Deeds, plats and who keeps them
The map is an index, not the title: deeds, plats and easements for land near Richland are kept by the County Auditor. Inherited tracts near West Richland may trace back through several deeds, and a title company can sort it out if money is changing hands.
Plat map vs. parcel map
When the two disagree for a lot near Prosser, the recorded plat and a survey control.
A quick look at the area
Prosser holds the county offices, where most land records are kept. You'll also find Richland, West Richland, and Benton City, where town lots give way to larger tracts. Around 215,219 people live in Benton County (Census Bureau estimate, 2023) spread over about 1,700 square miles. Benton County was organized in 1905, which matters when you trace an old farm's title. Features like Hanford Reach National Monument make handy reference points on the map near Prosser.
Reading the plat sheet
Utility or drainage strips on a lot in Kennewick stay with the land when it sells; read the notes on the sheet.
Taking the map into the field
Most viewers work in a phone browser, handy when you're parked on a road near Prosser, though signal can drop in rural spots. A screenshot of the parcel near Prosser with its ID keeps working without signal.
Reading the legal description
Washington follows the Public Land Survey System, so deeds around Benton City reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though sections near Prosser can be irregular. Copy the legal description from the record for the parcel near Prosser for any title or survey request.
Getting answers from the right desk
Recorded documents for a parcel near Benton City come from the County Auditor, sometimes only in person. Questions about what you can build around Prosser are for the local planning and health departments, and the answer depends on jurisdiction.
When there's no plat
Acreage around West Richland outside a subdivision may have no plat at all; the deed and any recorded survey describe it instead.
Amended plats
Lots near Prosser can be combined or reconfigured by a replat, so check for later filings; vacated streets or alleys also get recorded.
Requesting the plat
For property near Richland, some counties put plat images online, otherwise call or visit with the reference; small fees are common.
Land on the county line
Benton County meets Morrow County, OR, Umatilla County, OR, Franklin County, Grant County, and Klickitat County, all with their own assessor records. Acreage along the edge near West Richland can show up in two county records, so check the neighboring map before you assume the acreage. For a tract near Richland, the Platbookmapper state page links every neighboring county map for Washington.
Kennewick: common questions
Is a plat map a survey in Kennewick?
With a lot near West Richland, GIS parcels are tax drawings, and the recorded plat is the legal document; trust the plat when they differ.
What do the dashed lines on a plat mean near Benton City?
Out toward Richland, dashed lines often mark easements or building lines; read the plat notes.
Are old plats online near Prosser?
The County Auditor can say what's available.
Who has recorded plats for land near Prosser?
It depends, but the County Auditor keeps recorded plats.
Can I use the viewer in the field near Richland?
Most viewers run in a mobile browser; load it before you lose coverage near Richland.
Open the official Benton County, WA 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.