Blog · October 14, 2026 · Idaho
Reading the Hailey Plat Map for a lot
Lots in Hailey trace back to recorded plats filed with the county.
Main page: Blaine County, ID GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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If a legal description for land in Hailey cites a lot number, the Hailey plat map is where those numbers come from. Covered here for Hailey: where plats are filed, how a plat differs from a parcel map, and the details that matter to buyers.
The Hailey plat map: start here
For a lot in Hailey, the deed or parcel record often names the subdivision and plat reference; use it to request a copy.
Opening the official parcel viewer
Begin with the Idaho statewide Parcels layer in ArcGIS Map Viewer; it covers every assessed parcel from Sun Valley to Carey. For acreage around Ketchum, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. For a tract near Carey, a pop-up or side panel usually lists the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
Hailey, ID: the basics
Hailey is part of Blaine County, Idaho, which means parcel data comes from the county. Hailey is also the county seat, so deeds and plats are filed in town. With a lot near Carey, city or town hall handles matters such as zoning, permits and utilities inside its limits, and the county still keeps the parcel and deed records. Land beyond the town limits out by Sun Valley generally follows county rules rather than the town's.
Getting answers from the right desk
Recorded documents for a parcel near Sun Valley are with the County Recorder (the county clerk serves as recorder), often with an online index. Zoning, permits and septic questions near Carey need the planning or permitting office, depending on whether the land is inside town limits.
When a plat changes
Lots near Sun Valley can be combined or reconfigured by a replat, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
On site with the map
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Carey, though signal can drop in rural spots. A screenshot of the parcel near Carey with its ID keeps working without signal.
Land on the county line
Blaine County borders Bingham County, Butte County, Camas County, Cassia County, and Custer County, all with their own assessor records. A tract near the line by Ketchum may show up in two county records, so check the adjacent map as well. For land near Ketchum, the Platbookmapper state page links every bordering county map for Idaho.
Blaine County in a few facts
Hailey holds the county offices, which is where the courthouse records live. Other places on the map include Bellevue, Sun Valley, Ketchum, and Carey, where town lots give way to larger tracts. About 25,041 people live in Blaine County (Census estimate, 2023) spread over roughly 2,638 square miles. Blaine County was formed in 1895, so old deeds can run back a long way. Features like Craters of the Moon National Monument help you orient on the aerial around Sun Valley.
Two different maps
The Idaho statewide Parcels layer in ArcGIS Map Viewer draws parcels for taxes, while the recorded plat is the legal document.
Before you lean on the lines
Tax maps are drawn for assessment, not measured on the ground, so the edge of a yard near Ketchum can sit several feet off the line on screen. On ground around Ketchum, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Backing up the map with records
For anything that matters, pull the recorded deed from the County Recorder (the county clerk serves as recorder); the parcel map near Bellevue only summarizes it. Inherited tracts near Ketchum may go back through a long string of deeds, and a title company is worth hiring if money is changing hands.
Reading the plat sheet
For a home near Sun Valley, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
When there's no plat
Rural land near Ketchum that was never subdivided is often described by metes and bounds or survey description; the deed and any recorded survey describe it instead.
Getting a copy
For land near Bellevue, some counties put plat images online, while others require a visit or a request; copy fees are usually small.
Legal descriptions in Idaho
Idaho follows the Public Land Survey System, so rural legal descriptions near Carey cite 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 Ketchum can be irregular. Keep the legal description for land near Sun Valley before you request a deed or survey.
Frequently asked
Can I build on an easement in Hailey?
Near Carey, dashed lines often mark easements or building lines; read the plat notes.
What is a replat for land near Carey?
Good question; combining or splitting lots near Carey usually needs a recorded plat change.
Are old plats online for land near Ketchum?
Short answer: the County Recorder (the county clerk serves as recorder) can say what's available; call before you visit.
How is a plat different from the parcel map near Carey?
The plat near Carey is recorded, while the GIS layer is an approximation.
Why don't the lines match my fence near Bellevue?
No; boundary questions near Ketchum need a licensed surveyor; a survey sets the real corners
Open the official Blaine County, ID 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.