Blog · October 14, 2026 · New Hampshire
Coos County Plat Book, New Hampshire: what to know
If you're looking near West Stewartstown, plat books show ownership by township; the parcel viewer shows it today.
Main page: Coos County, NH GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Hunting for the latest Coos County plat book? These atlases map who owns rural land, page by page, useful for farms near Lancaster. Covered here for Coos County: how the atlas is organized, where to look for printed copies, and how the county viewer fills the gaps.
Tracking down a Coos County plat book
If you're looking near Lancaster, plat books are commercial atlases, with owner names on each tract, often organized by township.
The free map to start with
For a parcel near White Mountain National Forest, the public parcel map for this area is the NHDOT Parcel Mosaic Viewer, and no login is needed to use it. For a tract near Carroll, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. For a tract near Whitefield, write down the parcel ID from that panel; every office in the county uses it to find the file.
Why people still buy them
Farmers, hunters and appraisers near West Stewartstown use plat books for a big-picture view of who owns what.
Neighboring parcel maps
Coos County meets Oxford County, ME, Carroll County, Grafton County, and Essex County, VT, all with their own assessor records. Acreage along the edge near West Stewartstown can be split in two county records, so open the neighboring map before you assume the acreage. Around Groveton, our state page links every bordering county map across New Hampshire.
Making your own township pages
Screenshot each section of the viewer around Columbia and keep them in a binder for the truck.
Offices that can help
If the acreage or value on a parcel near Dalton looks off belong with the town assessor, the office behind the parcel record. Questions about what you can build around Gorham need the planning or permitting office, town or county, depending on location.
Limits of the parcel data
On ground around Colebrook, listed acreage is an assessed number; only a licensed surveyor can set the real corners on the ground. For property near West Stewartstown, records update in batches, so a deed recorded last month can take weeks to appear.
Buying or borrowing a copy
Libraries near Groveton sometimes keep past atlases, which helps when tracing a farm's history.
Sections, lots and bearings
Rural deeds near Carroll commonly use metes-and-bounds descriptions, a series of courses and distances from a starting point. Platted lots around Carroll usually use lot and block from a recorded plat instead, making them easier to find. Write down the legal description for the tract near Umbagog National Wildlife Refuge when you talk to a surveyor.
Between editions
For current names, use the NHDOT Parcel Mosaic Viewer, across the county, for land near Dalton included.
Plat book vs. recorded plat
A plat book is not a recorded plat: recorded plats near Colebrook are filed with the county Registry of Deeds, and the atlas is just a guide.
Where the recorded documents are
The map is an index, not the title: deeds, subdivision plats and easements covering ground around West Stewartstown are filed with the county Registry of Deeds. Long-held tracts near Colebrook can go back through several deeds, and a title company can sort it out before a purchase.
A quick look at the area
Lancaster is the county seat, home to the main records offices. Smaller places on the map include Berlin, Carroll, Clarksville, and Colebrook, where town lots give way to larger tracts. About 31,372 people live in Coos County (Census estimate, 2023) spread over about 1,795 square miles. Coos County dates to 1803, and some chains of title near West Stewartstown are long. Features like White Mountain National Forest are easy to spot when you zoom out.
Taking the map into the field
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Umbagog National Wildlife Refuge, though signal can drop in rural spots. A saved image of the lot near Whitefield and its lines keeps working without signal.
Questions about the Coos County plat book
Where can I buy a plat book for land near Colebrook?
For property near Columbia, it depends on whether a publisher has a current edition.
How do I research old landowners around Groveton?
Closer to Groveton, libraries and historical societies hold older editions.
Should I use the NHDOT Parcel Mosaic Viewer instead near Lancaster?
On ground around Dalton, the NHDOT Parcel Mosaic Viewer is free and updated more often.
How accurate are plat book acreages around Whitefield?
For acreage around West Stewartstown, plat book acreage and lines are approximate.
Can I print the parcel map for land near White Mountain National Forest?
Use the print button or a screenshot, and it's worth keeping the parcel ID visible for land near Umbagog National Wildlife Refuge.
Open the official Coos County, NH 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.