Blog · September 25, 2026 · Washington
Cowlitz Parcel Search: Assessor Property Info and the County Parcel Viewer
A Cowlitz parcel search has two halves: the Assessor’s Cowlitz Property Info for records, and a set of county GIS maps for the parcel viewer side. The county runs several maps with different jobs, so this guide explains which one to open.
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Cowlitz Property Info: the record search
Cowlitz Property Info is the Assessor and Treasurer record system. Pick a search type, Address, Parcel or Property ID, and enter the value. The site notes that it is newer, and it invites anyone who cannot find something to contact the Assessor at 360-577-3010.
The site’s announcements say notices of value are scheduled for July and tax statements for around mid-February.
Which Cowlitz parcel viewer to use
Cowlitz County’s web map applications page lists several public maps:
- Primary Web Map. The county says this map has the most robust search criteria and is a great tool for general searching.
- Assessors Web Map, which is linked to assessor data.
- Building & Planning EPIC Web Map, the Environmental Planning Internet Clearance map.
- Public Works Web Map, with a county road right-of-way layer that links many right-of-way documents.
The county’s property and parcel page also links an Assessor’s GIS Map built in ArcGIS Experience Builder. For an ordinary Cowlitz parcel search, start with the Primary Web Map or the Assessor’s GIS Map. Use EPIC when you are planning a project and the Public Works map when road right-of-way matters.
Cowlitz County taxes
The Treasurer’s page said on September 25, 2026 that first-half 2026 taxes were past due and second-half taxes are due by October 31. The 2026 statements were mailed February 17. The Treasurer can be reached at 360-577-3060, and the Treasurer’s page links to online payment and tax-due lookups.
Addresses and corrections
If an address search misses, try the parcel number or Property ID. If you think a Cowlitz address itself is wrong, the county’s web map page links an address correction form for reporting it.
If a Cowlitz map is down
Because the county runs several maps, one being down rarely leaves you stuck. Try another map from the web map page, or skip the map and use Property Info. Our directory entry is at Cowlitz County in our Washington directory.
More Washington parcel viewers
Platbookmapper keeps a free, county-by-county directory of official parcel viewers and county GIS maps across the United States. Neighboring Lewis County is covered too, and the Washington county GIS page lists every county. If you research land in more than one county, start at the all-states directory or pick a county on the national parcel map, and you will land on the official viewer instead of a data-broker copy.
Frequently asked questions
How do I run a Cowlitz parcel search?
Use Cowlitz Property Info by address, parcel number or Property ID, or search the county’s Primary Web Map.
Which Cowlitz map is best for general searching?
The county says the Primary Web Map has the most robust search criteria.
What is the Cowlitz EPIC map?
EPIC is the Environmental Planning Internet Clearance map used by Building and Planning.
When are Cowlitz second-half taxes due?
The Treasurer lists October 31 for second-half 2026 taxes.
Is the Cowlitz parcel viewer a survey?
No. The county disclaims the accuracy of its GIS data. Use a licensed surveyor for boundaries.
Open the Cowlitz County Assessor’s GIS Map Open Cowlitz Property Info Cowlitz County 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.