Blog · October 14, 2026 · Pennsylvania
Pittsburgh GIS Map: looking up parcels
Most property questions near Etna start with a parcel lookup.
Main page: Allegheny County, PA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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For a parcel in or near Pittsburgh, the Pittsburgh GIS map lays out lines, owner names and parcel numbers. This city guide covers: where that map lives, how to search it, and the limits worth knowing, especially near Aspinwall.
Opening the Pittsburgh GIS map: start here
A town may publish separate layers for zoning or utilities; check the Pittsburgh website for one.
The free map to start with
Your first stop is the Allegheny County ArcGIS parcel map; it maps every tax parcel from Green Tree to Mount Oliver. Out toward Etna, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. Closer to Etna, a pop-up or side panel typically gives the owner of record, assessed acreage, a parcel ID and in many cases the last transfer.
Before you lean on the lines
The acreage figure is a tax-roll number; only a licensed surveyor can set the real corners for a parcel near Green Tree. Owner names and values update on a schedule, so a recent sale near Green Tree might lag behind.
Legal descriptions in Pennsylvania
Older tracts around Baldwin commonly use metes-and-bounds descriptions, listing bearings, distances and landmarks. Platted lots around Millvale refer to a recorded plat, making them easier to find. Write down the legal description for the tract near Mount Oliver when you talk to a surveyor.
Pittsburgh, PA: the basics
The city lies within Allegheny County, Pennsylvania, so its parcels are on the county's map, especially near Baldwin. As the county seat, Pittsburgh hosts the courthouse, which puts the Recorder of Deeds close by. For a parcel near Baldwin, 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. Acreage past the town limits toward Millvale often falls under county rules instead.
When the map won't load
If the viewer stalls on a phone near Etna, try a desktop browser or clear the cache; the Platbookmapper county page tracks the current link.
Three ways to find a parcel
For a house in Pittsburgh, search the street address; owner search often wants the surname first. With a lot near Millvale, searching by parcel number never misses, and you'll find it on tax statements.
Keeping a record
Print or screenshot the parcel near Etna with its ID visible, so you have it when calling an office.
Deeds, plats and who keeps them
For anything that matters, get the recorded deed from the Recorder of Deeds; the parcel map near Green Tree only summarizes it. Out toward Homestead, have ready the instrument number listed on the parcel record so staff can find the deed fast.
Beyond the parcel lines
On ground around Baldwin, layer lists often include municipal boundaries, floodplain and sometimes zoning; availability varies.
Next door to Allegheny County
Allegheny County meets Armstrong County, Beaver County, Butler County, Washington County, and Westmoreland County, and each of those keeps its own parcel map. Acreage along the edge near Etna can be split across two assessors' files, so open the adjacent map as well. The Platbookmapper state page lists every neighboring county map for Pennsylvania.
Which office to call
For assessment questions about property around Etna are handled by the county assessment office, the office behind the parcel record. Questions about what you can build around Etna go to planning, building or health offices, town or county, depending on location.
Allegheny County in a few facts
Pittsburgh holds the county offices, home to the main records offices. Other places on the map include Mount Oliver, Millvale, Etna, and Homestead, each with its own cluster of lots. Around 1,224,825 people call Allegheny County home (Census Bureau estimate, 2023) on about 730 square miles. Allegheny County was organized in 1788, and some chains of title near Etna are long. Features like Allegheny River and Monongahela River are easy to spot when you zoom out from Etna.
Field tips
Most viewers work in a phone browser, which helps when you're standing on land near Homestead, but coverage can be spotty out of town. A screenshot of the parcel near Etna with its ID helps when you meet an owner or agent.
Reading a parcel record
Click a lot in Pittsburgh and the record usually shows owner, mailing address, assessed value and acreage.
Questions about the Pittsburgh GIS map
How do I find who owns a lot near Homestead?
In most cases, the parcel record for a lot near Baldwin lists the owner of record; try variations if nothing comes up.
Are parcel lines on the map exact around Green Tree?
Short answer: the map near Etna isn't a survey, so a licensed surveyor should mark corners.
Can I see aerial photos on the map near Etna?
With a lot near Baldwin, many viewers offer aerial imagery plus layers like city limits, zoning or flood zones.
Is there a separate city GIS for Pittsburgh?
In most cases, check the Pittsburgh website or ask city hall, while parcel data usually comes from the county.
Where do I ask about an assessment near Homestead?
The county assessment office handles values and the tax roll, and the Recorder of Deeds keeps deeds; planning offices cover zoning near Mount Oliver
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.