Blog · October 14, 2026 · Pennsylvania
Using the Plum GIS Map
Parcel data for Plum comes from the county, and the viewer is free.
Main page: Allegheny County, PA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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For any lot around Cheswick, the Plum GIS map lays out lines, owner names and parcel numbers. This Plum guide covers: where that map lives, how to search it, and what to double-check with records.
Opening the Plum GIS map
Parcel maps here are usually run by the county, not the town, so for Plum the go-to is the Allegheny County ArcGIS parcel map.
Getting to the right map
Property in and around Monroeville appear on the Allegheny County ArcGIS parcel map, which opens without registering. If the land is near Monroeville, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. For land near Blawnox, write down the parcel ID while you have it open; every records desk in the county asks for it first.
Plum and the county around it
Plum lies within Allegheny County, Pennsylvania, and the county assessor maps its lots. For acreage around Monroeville, city or town hall handles things like zoning, permits and utilities within town limits, but the county runs assessment and recording. Acreage past the town limits toward Cheswick usually follows county rules rather than the town's.
Reading the legal description
Older tracts around Oakmont commonly use metes-and-bounds descriptions, listing bearings, distances and landmarks. Subdivision lots in Oakmont refer to a recorded plat, which is simpler to follow. Keep the legal description for land near Blawnox for any title or survey request.
Getting your bearings
Pittsburgh serves as the county seat, home to the main records offices. You'll also find Springdale, Cheswick, Oakmont, and Verona, where town lots give way to larger tracts. About 1,224,825 people live in Allegheny County (Census estimate, 2023) on about 730 square miles. Allegheny County was formed in 1788, and some chains of title near Monroeville are long. Features like Allegheny River and Monongahela River are easy to spot when you zoom out from Monroeville.
Finding the right lot
Vacant ground near Springdale may lack an address, which means panning to it and clicking. With a lot near Cheswick, searching by parcel number never misses, and it carries over to every office in the county.
Browser tips
If the viewer stalls on a phone near Cheswick, switch browsers or turn off pop-up blockers; links occasionally change, and our directory page keeps the current one.
Where the recorded documents are
When the details count, get the recorded deed from the Recorder of Deeds; the parcel map near Oakmont only summarizes it. Long-held tracts around Oakmont can trace back through several deeds, so a title company can sort it out before a purchase.
Getting answers from the right desk
If the acreage or value on a parcel near Cheswick looks off belong with the county assessment office, the office behind the parcel record. Building or septic questions for a lot near Cheswick need the planning or permitting office, town or county, depending on location.
Neighboring parcel maps
Allegheny County borders Armstrong County, Beaver County, Butler County, Washington County, and Westmoreland County; every one of them runs a separate parcel map. A tract near the line by Cheswick may show up across two assessors' files, so check the neighboring map as well. With a lot near Cheswick, our state page links each neighboring county map for Pennsylvania.
Using it on a phone
Most viewers work in a phone browser, useful out on a road near Monroeville, but coverage can be spotty out of town. A screenshot of the parcel near Cheswick with its ID keeps working without signal.
Keeping a record
Print or screenshot the parcel near Springdale with its ID visible, which helps later when you ask the assessor or a title company.
Before you lean on the lines
Parcel lines are drawn for taxes, not surveyed, so a tree line near Blawnox can sit several feet off the line on screen. In and around Cheswick, records update in batches, so a deed recorded last month might lag behind.
Layers worth turning on
If you're looking near Cheswick, look in the layer list for municipal boundaries, floodplain and sometimes zoning; not every viewer has them all.
Inside the parcel card
If sale dates appear, they help gauge the market in Plum give a rough idea of values; they're not an appraisal.
Frequently asked
What layers does the parcel viewer have around Verona?
With a lot near Monroeville, many viewers offer aerial imagery plus layers like city limits, zoning or flood zones; open the layer list to see what's there.
How current is the parcel data around Springdale?
With a lot near Cheswick, updates come in batches.
Is the Plum GIS map free?
Good question; the Allegheny County ArcGIS parcel map is free and opens without a login.
Can I search by owner name in Plum?
In most cases, the parcel record for a lot near Springdale lists the owner of record; try variations if nothing comes up.
Does the parcel map work on a phone in Plum?
The map near Blawnox usually works on a phone; load it before you lose coverage near Springdale.
Open the official Allegheny County, PA 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.