Blog · October 14, 2026 · Washington
Using the Sunnyside Plat Map
Lots in Sunnyside trace back to recorded plats filed with the county.
Main page: Yakima County, WA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Buying a lot in a subdivision near Mabton? What you want is the Sunnyside plat map, since it shows lots, streets and easements as approved. In this Sunnyside guide: where to request a copy, how a plat differs from a parcel map, and what to look for on the sheet.
Getting started with the Sunnyside plat map
For a lot in Sunnyside, the deed or parcel record often names the subdivision and plat reference; that makes the request quick.
Where the parcel data lives
Begin with the Yakima County parcel viewer; it maps each tax parcel around Moxee and Grandview. If you're looking near Zillah, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. In and around Granger, a pop-up or side panel usually lists the owner of record, acreage on the tax roll, the parcel number and in many cases the last transfer.
Places you'll see on the map
Yakima serves as the county seat, home to the main records offices. Other places on the map include Grandview, Mabton, Granger, and Zillah, where town lots give way to larger tracts. Roughly 256,643 people call Yakima County home (Census Bureau estimate, 2023) spread over roughly 4,295 square miles. Yakima County was formed in 1865, which matters when you trace an old farm's title. Features like Wenatchee National Forest make handy reference points on the map near Grandview.
How land is described here
Washington uses the Public Land Survey System, so rural legal descriptions near Moxee 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 Granger can be irregular. Copy the legal description from the record for the parcel near Granger when you talk to a surveyor.
Amended plats
Lots near Toppenish can be combined or reconfigured by a replat, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
Where Sunnyside fits in
Sunnyside is part of Yakima County, Washington, and the county assessor maps its lots. If you're looking near Granger, the municipality handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Land beyond the city limits out by Moxee often answers to county rules, not municipal ones.
Which office to call
Recorded documents for a parcel near Zillah sit in the index kept by the County Auditor, usually searchable by name or document number. Questions about what you can build around Mabton are for the local planning and health departments, and the answer depends on jurisdiction.
Using it on a phone
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Granger, but coverage can be spotty out of town. A screenshot of the parcel near Mabton with its ID is a good backup.
Land outside a subdivision
Rural land near Mabton that was never subdivided is often described by metes and bounds or survey description; look for a recorded survey for land near Grandview.
Recorded documents worth pulling
The map is an index, not the title: deeds, plats and easements for land near Grandview are filed with the County Auditor. Inherited tracts near Mabton may go back through several deeds, and a title company earns its fee before a purchase.
How a plat differs from the tax map
The Yakima County parcel viewer draws parcels for taxes, whereas the plat carries surveyed dimensions.
A word on accuracy
Tax maps are drawn for assessment, not surveyed, so a tree line near Zillah can sit some distance off the line on screen. Owner names and values update on a schedule, so a fresh transfer around Grandview might lag behind.
When a parcel crosses a boundary
Yakima County meets Benton County, Grant County, King County, Kittitas County, and Klickitat County, all with their own assessor records. A tract near the line by Toppenish may show up across two assessors' files, so check the adjacent map as well. For a parcel near Mabton, our state page lists each bordering county map for Washington.
Lots, blocks and easements
Easements on the plat near Mabton limit where you can build or fence; read the notes on the sheet.
Online indexes and office visits
Near Zillah, many recorder offices offer an online index, otherwise call or visit with the reference; copy fees are usually small.
Frequently asked
Where are historic plats for Sunnyside?
On ground around Moxee, it varies; some offices have scanned older plats and some haven't; call before you visit.
What is a replat near Zillah?
Short answer: lot splits in Sunnyside go through the planning office.
Where can I find the Sunnyside plat map?
It depends, but recorded plats near Moxee are filed with the County Auditor; small copy fees are common.
Do easements show on the plat near Grandview?
For most people, building on an easement near Grandview is generally restricted; ask planning staff if unsure.
Can I download parcel lines near Zillah?
Some viewers offer PDF export, and it's worth keeping the parcel ID visible for land near Granger.
Open the official Yakima 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.