Blog · October 14, 2026 · Pennsylvania
Using the Pleasant Hills Plat Map
Lots in Pleasant Hills trace back to recorded plats filed with the county.
Main page: Allegheny County, PA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Checking easements on a house in Pleasant Hills? What you want is the Pleasant Hills plat map, since it shows lots, streets and easements as approved. In this Pleasant Hills guide: where plats are filed, plat versus tax map, and the details that matter to buyers.
Who keeps the Pleasant Hills plat map
For land around Brentwood, the deed usually cites the plat; bring that to the recorder's office or its online index.
Getting to the right map
Your first stop is the Allegheny County ArcGIS parcel map; it maps every tax parcel around West Mifflin and Brentwood. Out toward Glassport, put in a street address, an owner's name or a parcel number, then pick the result to center the map on it. In and around Brentwood, the record panel usually lists the owner of record, assessed acreage, the parcel number and in many cases the last transfer.
Next door to Allegheny County
Allegheny County meets Armstrong County, Beaver County, Butler County, Washington County, and Westmoreland County, all with their own assessor records. Ground near Whitehall that runs to the line may show up in two county records, so look at the neighboring map too. For a home near West Mifflin, the Platbookmapper state page lists each bordering county map for Pennsylvania.
A word on accuracy
Acreage on the record is an estimate; only a licensed surveyor sets the real corners on land around Jefferson Hills. For a home near Jefferson Hills, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Using it on a phone
The parcel map usually runs in a mobile browser, handy when you're parked on a road near West Mifflin, so load it before you lose signal. A screenshot of the parcel near Jefferson Hills with its ID helps when you meet an owner or agent.
City limits and county records
Pleasant Hills lies within Allegheny County, Pennsylvania, so its parcels are on the county's map. For a home near Brentwood, city or town hall handles matters such as zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Acreage past the town limits near Baldwin usually follows county rules, not municipal ones.
Offices that can help
If the acreage or value on a parcel near Baldwin looks off are handled by the county assessment office, since that office keeps the assessment data. Zoning, permits and septic questions near Jefferson Hills need the planning or permitting office, town or county, depending on location.
Reading the legal description
Rural deeds near West Mifflin are often described by metes and bounds, listing bearings, distances and landmarks. Subdivision lots in Jefferson Hills refer to a recorded plat, which is simpler to follow. Copy the legal description from the record for the parcel near Glassport for any title or survey request.
When there's no plat
Rural land near Baldwin that was never subdivided may have no plat at all; look for a recorded survey for land near Jefferson Hills.
The paper trail behind a parcel
When the details count, request the recorded deed from the Recorder of Deeds; the parcel map near Whitehall only summarizes it. Near Brentwood, have ready the instrument number listed on the parcel record so staff can find the deed fast.
Recorded plat or GIS layer
If the tax map and plat differ near Brentwood, the recorded plat and a survey control.
When a plat changes
An amended plat may change lots around Glassport, so check for later filings; vacated streets or alleys also get recorded.
Allegheny County in a few facts
Pittsburgh holds the county offices, which is where the courthouse records live. You'll also find Jefferson Hills, Whitehall, Brentwood, and West Mifflin. About 1,224,825 people live in Allegheny County (Census Bureau estimate, 2023) spread over about 730 square miles. Allegheny County was formed in 1788, and some chains of title near West Mifflin are long. Features like Allegheny River and Monongahela River make handy reference points on the map near West Mifflin.
What a plat shows
With a lot near West Mifflin, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Requesting the plat
For a parcel near Jefferson Hills, some counties put plat images online, while others require a visit or a request; small fees are common.
Frequently asked
Is a plat map a survey for land near Baldwin?
Closer to Brentwood, GIS parcels are tax drawings, and the recorded plat is the legal document; trust the plat when they differ.
Are old plats online for land near Jefferson Hills?
Generally, older plats near Jefferson Hills may be on film or paper.
What is a lot and block description near Baldwin?
Around Jefferson Hills, lot and block refer to a numbered lot within a block on a recorded subdivision plat; the deed names the subdivision.
What do the dashed lines on a plat mean near Glassport?
For land near Brentwood, dashed lines often mark easements or building lines; read the plat notes.
Where do I find the parcel number for land near Brentwood?
It's the number the county assessment office uses to track a tract near West Mifflin, and it's on the record panel and tax bills.
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.