Blog · October 14, 2026 · Oregon
Using the Tualatin Zoning Map
Zoning decides what can be built where, and the answer for a lot near Wilsonville starts with the right map.
Main page: Clackamas County, OR GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any building plan near West Linn, check the Tualatin zoning map before anything else: the zoning district decides setbacks, lot size and uses. Covered here for Tualatin: which office sets the rules for a lot, matching a lot to its zoning district, and what to ask the planning staff.
Which office controls the Tualatin zoning map
Inside town or city limits, zoning usually comes from the municipality, which means a parcel in Tualatin follows that code. Outside those limits, near West Linn or Rivergrove, the county may have its own zoning, or none at all; the county planning or zoning office can confirm. A fast way to settle it: ask whether the parcel near Canby is inside the boundary.
The free map to start with
Go first to the ORMAP statewide tax lot viewer; it maps each assessed parcel in the county, Rivergrove included. Closer to Wilsonville, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. For a tract near Wilsonville, write down the parcel ID while you have it open; each clerk in the county will want it.
Tualatin, OR: the basics
Tualatin is part of Clackamas County, Oregon, so its parcels are on the county's map. For property near West Linn, City or town hall handles things like zoning, permits and utilities within town limits, but the county runs assessment and recording. Land beyond the town limits out by Wilsonville generally follows county rules rather than the town's.
How to look up the district
Pull the parcel up on the ORMAP statewide tax lot viewer, note the parcel number, then compare it to the zoning map from the office covering Tualatin. Labels such as R-1, B-2 or AG aren't self-explanatory, so read the ordinance chapter for each; codes near Lake Oswego may differ from the next town's.
Reading the ordinance
For property near West Linn, the ordinance spells out uses allowed by right, uses needing a permit, and uses not allowed. In and around Wilsonville, overlay districts, whether historic, floodplain or corridor, can add rules on top of the base district.
Backing up the map with records
The map is an index, not the title: deeds, plats and easements for land near Canby sit with the County Clerk. If the land is near Milwaukie, have ready the book and page shown in the record panel so staff can find the deed fast.
Next door to Clackamas County
Clackamas County touches Hood River County, Marion County, Multnomah County, Wasco County, and Washington County, and each of those keeps its own parcel map. Acreage along the edge near Wilsonville can show up in two county records, so open the adjacent map as well. For property near Rivergrove, our state page links each neighboring county map for Oregon.
What the map can't tell you
The acreage figure is an estimate; just a licensed surveyor can set the real corners on land around Wilsonville. In and around Milwaukie, records update in batches, so a deed recorded last month might lag behind.
Permits after zoning
Once zoning clears a project near West Linn, you still need building permits and inspections; health and road departments may weigh in on land near Canby.
Taking the map into the field
Most viewers work in a phone browser, useful out on a road near Lake Oswego, but coverage can be spotty out of town. A saved image of the lot near Rivergrove and its lines helps when you meet an owner or agent.
When a plan doesn't fit
Closer to Milwaukie, expect an application, a fee, notice to neighbors and a public hearing.
Who handles what
Questions about value or the owner field for land near Lake Oswego are handled by the County Assessor, the office behind the parcel record. Questions about what you can build around Canby go to planning, building or health offices, and the answer depends on jurisdiction.
Calling planning staff
Have the parcel ID ready and describe the plan for the lot near Canby; staff can point to the right section of the ordinance. Also ask whether the lot near West Linn is a legal lot of record, since some older splits don't.
Reading the legal description
Oregon uses the Public Land Survey System, so rural legal descriptions near Canby cite section, township and range. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though sections near Canby can be irregular. Copy the legal description from the record for the parcel near Canby before you request a deed or survey.
Tualatin: common questions
How long does rezoning take in Tualatin?
In most cases, the governing body near Lake Oswego decides after hearings.
Is zoning on the ORMAP statewide tax lot viewer around Lake Oswego?
It depends, but a zoning layer may be in the ORMAP statewide tax lot viewer layer list, but the adopted map from the planning office is the official version.
Do I need a permit for a home business in Tualatin?
Good question; home businesses in Tualatin are often allowed with conditions, so check before you start.
Does the county zone rural land near Canby?
Short answer: land beyond Tualatin limits usually follows county rules, if any.
What's a legal description around Milwaukie?
In and around Rivergrove, deeds use lot and block, metes and bounds or survey descriptions; copy it for any survey or title request.
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.