Blog · October 14, 2026 · Washington
Union Gap Flood Zone Map: checking a property's flood zone
Flood zones are set by FEMA, and checking one near Selah takes a few minutes.
Main page: Yakima County, WA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Harrah? A quick look at the Union Gap flood zone map shows whether it sits in a FEMA flood zone, and no account is needed. This Union Gap guide covers: locating a parcel on FEMA's map, reading the zone codes, and matching it with the county parcel viewer.
Checking the Union Gap flood zone map step by step
Flood zones come from FEMA's Flood Map Service Center: type an address near Zillah, then open the map view for that panel. Vacant ground around Zillah is still easy to locate: zoom in from Interstate 82 and click the spot.
Where the parcel data lives
Begin with the Yakima County parcel viewer; it includes each assessed parcel in the county, Zillah included. Near Moxee, type a street address, an owner's name or a parcel number, then pick the result to center the map on it. For acreage around Zillah, the parcel card usually lists the owner of record, acreage on the tax roll, the parcel number and often a sale date.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Harrah, but coverage can be spotty out of town. A printout of the tract near Harrah helps when you meet an owner or agent.
Offices that can help
Deeds, mortgages and recorded plats for land near Selah come from the County Auditor, usually searchable by name or document number. Zoning, permits and septic questions near Zillah are for the local planning and health departments, town or county, depending on location.
A quick look at the area
Yakima is the county seat, home to the main records offices. You'll also find Moxee, Selah, and Wapato, where town lots give way to larger tracts. Around 256,643 people live in Yakima County (Census Bureau estimate, 2023) spread over some 4,295 square miles. Yakima County was formed in 1865, and some chains of title near Harrah are long. Landmarks such as Wenatchee National Forest are easy to spot when you zoom out from Harrah.
Beyond the mapped zones
Small streams around Wapato aren't always studied in detail, so ask neighbors about past flooding. Marshy spots near Harrah can limit building too; check the National Wetlands Inventory mapper for a first look.
Recorded documents worth pulling
The map is an index, not the title: recorded deeds, plats and easements covering ground around Wapato are kept by the County Auditor. Long-held tracts near Moxee can trace back through several deeds, so a title company earns its fee before a purchase.
What to request from a seller
Ask the seller whether the home has flooded on the property near Zillah; an insurance quote early keeps the budget honest.
Sections, lots and bearings
Washington uses the Public Land Survey System, so rural legal descriptions near Harrah cite section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though sections near Moxee can be irregular. Write down the legal description for the tract near Zillah for any title or survey request.
Neighboring parcel maps
Yakima County touches Benton County, Grant County, King County, Kittitas County, and Klickitat County, all with their own assessor records. Ground near Zillah that runs to the line may be split in two county records, so check the neighboring map too. On ground around Moxee, our state page lists each bordering county map for Washington.
City limits and county records
Union Gap is part of Yakima County, Washington, which means parcel data comes from the county. On ground around Wapato, city or town hall handles matters such as zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Land beyond the town limits near Selah generally falls under county rules rather than the town's.
What the zone letters mean
For land near Yakima, zones beginning with A or V mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. For a tract near Yakima, a shaded X area is moderate risk, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so check the Yakima County parcel viewer too to see exactly which lot near Zillah you're looking at.
What a flood zone means for a buyer
With a lot near Moxee, ask for an Elevation Certificate: it compares the building to the BFE. Building or adding on near Yakima in a mapped zone often needs a floodplain permit; ask the local floodplain administrator before you plan.
Quick answers
When is flood insurance required near Wapato?
Good question; for a building near Wapato in an A or V zone with a federally backed or regulated mortgage, it's generally required; elsewhere it's optional.
Is there a flood layer on the parcel viewer near Wapato?
Short answer: the parcel map near Wapato might show FEMA zones, but FEMA's own map is the official source.
How often are flood maps updated near Wapato?
A new study can move a zone line near Moxee; check the effective date on the panel.
Is AE a high-risk flood zone for land near Zillah?
Both are high-risk zones, but only AE has a base flood elevation, so builders near Moxee design to that elevation.
Can I download parcel lines near Selah?
Use the print button or a screenshot; include the record panel for the lot near Zillah.
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.