Blog · October 14, 2026 · Oregon
Milwaukie Plat Map: finding the recorded plat
Lots in Milwaukie trace back to recorded plats filed with the county.
Main page: Clackamas County, OR GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When a deed near Happy Valley says lot and block, look up the Milwaukie plat map it refers to. This Milwaukie guide covers: where to request a copy, plat versus tax map, and what to look for on the sheet.
Who keeps the Milwaukie plat map
For land around Gladstone, the deed or parcel record often names the subdivision and plat reference; use it to request a copy.
The viewer Clackamas County publishes
Your first stop is the ORMAP statewide tax lot viewer; it includes each assessed parcel around Portland and Johnson City. Closer to West Linn, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. In and around Gladstone, write down the parcel ID from that panel; each clerk in the county asks for it first.
Where Milwaukie fits in
Milwaukie is part of Clackamas County, Oregon, so its parcels are on the county's map. For a home near Portland, City or town hall handles things like zoning, permits and utilities within town limits, while the county keeps the tax map. Land beyond the city limits near Johnson City usually falls under county rules rather than the town's.
Plat map vs. parcel map
Where lines don't match in Milwaukie, trust the recorded documents over the GIS layer.
Neighboring parcel maps
Clackamas County touches Hood River County, Marion County, Multnomah County, Wasco County, and Washington County; every one of them runs a separate parcel map. A tract near the line by Gladstone may be split across two assessors' files, so check the adjacent map before you assume the acreage. In and around Happy Valley, our state page lists every bordering county map across Oregon.
Recorded documents worth pulling
The map is an index, not the title: deeds, plats and easements covering ground around Gladstone sit with the County Clerk. Long-held tracts near Portland can sit on many deeds, so a title company is worth hiring on a real sale.
Replats and vacations
An amended plat may change lots around Lake Oswego, so check for later filings; vacated streets or alleys also get recorded.
Offices that can help
Recorded documents for a parcel near Gladstone sit in the index kept by the County Clerk, often with an online index. Zoning, permits and septic questions near West Linn go to planning, building or health offices, town or county, depending on location.
Metes and bounds instead
Rural land near Portland that was never subdivided is often described by metes and bounds or survey description; the deed and any recorded survey describe it instead.
Getting your bearings
Oregon City holds the county offices, home to the main records offices. You'll also find Johnson City, Gladstone, Lake Oswego, and Happy Valley, each with its own cluster of lots. Around 423,173 people live in Clackamas County (Census Bureau estimate, 2023) across roughly 1,871 square miles. Clackamas County dates to 1843, and some chains of title near Happy Valley are long.
Lots, blocks and easements
In and around Happy Valley, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
A word on accuracy
The acreage figure is a tax-roll number; only a licensed surveyor establishes the real lines for a parcel near Gladstone. If the land is near Happy Valley, records update in batches, so a deed recorded last month might lag behind.
Requesting the plat
If the land is near West Linn, many recorder offices offer an online index, otherwise call or visit with the reference; copy fees are usually small.
Legal descriptions in Oregon
Oregon follows the Public Land Survey System, so deeds around Gladstone reference sections and townships. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though corrections make some sections near Gladstone odd-sized. Keep the legal description for land near West Linn for any title or survey request.
On site with the map
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Gladstone, though signal can drop in rural spots. A printout of the tract near Gladstone is a good backup.
Questions about the Milwaukie plat map
What is a lot and block description for land near Gladstone?
For a parcel near West Linn, the description sends you to a specific recorded plat; the deed names the subdivision.
What do the dashed lines on a plat mean in Milwaukie?
For property near Johnson City, dashed lines often mark easements or building lines; read the plat notes.
What is a replat near Johnson City?
Combining or splitting lots near Portland usually needs a recorded plat change.
Where are historic plats for Milwaukie?
Older plats near Gladstone may be on film or paper.
What's the tax parcel number used for in Milwaukie?
It's the number the County Assessor uses to track a tract near Happy Valley; copy it before you call anyone.
Open the official Clackamas County, OR 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.