Blog · October 14, 2026 · Pennsylvania
The Montgomery County Plat Book and the online parcel map
For property near Blue Bell, plat books show ownership by township; the parcel viewer shows it today.
Main page: Montgomery County, PA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Want a copy of the Montgomery County plat book? It's a printed atlas of landownership, usually by township, useful for farms near Bala Cynwyd. This county guide covers: what's in a plat book, where to find editions, and the free online map that stays current, especially near Blue Bell.
Getting started with the Montgomery County plat book
Town lots near Horsham Township are usually too small to label, which is where the parcel viewer helps.
Pulling up a parcel
Begin with the Montgomery County parcel viewer; it covers every assessed parcel around Ardmore and Ambler. When a rural tract has no street number, follow Interstate 276 on the aerial and select the outline. For acreage around Whitemarsh Township, a pop-up or side panel usually lists the owner of record, assessed acreage, the parcel number and sometimes recent sales.
Using it on a phone
Most viewers work in a phone browser, useful out on a road near Audubon, so load it before you lose signal. A saved image of the lot near Norristown and its lines is a good backup.
Backing up the map with records
In and around Norristown, the map is an index, not the title: recorded deeds, plats and easements for parcels in the county are filed with the Recorder of Deeds. Out toward Bryn Athyn, have ready the document number shown in the record panel and the lookup takes minutes.
Where to look for one
Older editions near Bala Cynwyd turn up in libraries and historical societies, which helps when tracing a farm's history.
The free online alternative
For current names, use the Montgomery County parcel viewer, across the county.
Montgomery County in a few facts
Norristown is the county seat, where most land records are kept. You'll also find Bryn Athyn, Cheltenham Township, Horsham Township, and Plymouth Township, each with its own cluster of lots. Roughly 868,742 people call Montgomery County home (Census estimate, 2023) on about 483 square miles. Montgomery County dates to 1784, so old deeds can run back a long way.
Who handles what
For assessment questions about property around Horsham Township are handled by the county assessment office, which maintains the tax roll. Zoning, permits and septic questions near Bryn Mawr are for the local planning and health departments, town or county, depending on location.
How land is described here
Older tracts around Bryn Mawr are often described by metes and bounds, a series of courses and distances from a starting point. Town lots near Blue Bell usually use lot and block from a recorded plat instead, which is simpler to follow. Copy the legal description from the record for the parcel near Bryn Athyn when you talk to a surveyor.
Printing your own
Print parcel views near Whitemarsh Township township by township to build your own up-to-date atlas.
Who uses plat books
Farmers, hunters and appraisers near Plymouth Township use plat books to see ownership across many tracts at once.
When a parcel crosses a boundary
Montgomery County meets Berks County, Bucks County, Chester County, Delaware County, and Lehigh County, and each of those keeps its own parcel map. Ground near Ambler that runs to the line may be split across two assessors' files, so check the adjacent map before you assume the acreage. With a lot near Blue Bell, our state page lists each neighboring county map for Pennsylvania.
A word on accuracy
With a lot near Cheltenham Township, the acreage figure is a tax-roll number; only a licensed surveyor establishes the real boundary on the ground. Closer to Ambler, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Two kinds of plat
Closer to Bryn Mawr, a plat book is not a recorded plat: the recorded plat at the Recorder of Deeds is a legal document, while the atlas is a reference.
Quick answers
Are old plat books online for land near Bala Cynwyd?
Out toward Plymouth Township, some older atlases have been digitized; call ahead.
Where can I buy a plat book for land near Bryn Athyn?
Generally, the extension office or courthouse near Bryn Mawr usually knows; online parcel maps fill the gaps.
Can I use a plat book for a boundary near Plymouth Township?
For land near Plymouth Township, a plat book is a privately published atlas; use a surveyor for lines.
Why does the plat book differ from the deed around Bryn Athyn?
If you're looking near Audubon, the deed and a survey decide.
How do I save a parcel from the viewer around Whitemarsh Township?
Around Bala Cynwyd, some viewers offer PDF export; downloads of raw data vary by county.
Open the official Montgomery 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.