Blog · October 14, 2026 · New Hampshire
The Sullivan County Plat Book and the online parcel map
For a tract near East Lempster, plat books show ownership by township; the parcel viewer shows it today.
Main page: Sullivan County, NH GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Hunting for the latest Sullivan County plat book? These atlases map who owns rural land, page by page, and it's handy for land around Claremont. This Sullivan County guide covers: what's in a plat book, where to find editions, and how the county viewer fills the gaps.
Getting started with the Sullivan County plat book
For a parcel near Georges Mills, a plat book is a privately published atlas, that map ownership across the countryside, often organized by township.
Opening the official parcel viewer
For acreage around Croydon, the official parcel map for this area is the NHDOT Parcel Mosaic Viewer, and it opens in a browser with no account. When a rural tract has no street number, pan along the nearest road and click the parcel itself, and that holds around East Lempster too. For a home near Balloch, write down the parcel ID before closing the panel; each records desk in the county will want it.
Who handles what
For assessment questions about property around East Lempster are handled by the town assessor, since that office keeps the assessment data. Questions about what you can build around Goshen go to planning, building or health offices, and the answer depends on jurisdiction.
Deeds, plats and who keeps them
If the land is near East Lempster, the map is an index, not the title: deeds, plats and easements for parcels in the county are filed with the county Registry of Deeds. For acreage around Plainfield, use the instrument number listed on the parcel record and the lookup takes minutes.
Taking the map into the field
Most viewers work in a phone browser, which helps when you're standing on land near Georges Mills, though signal can drop in rural spots. A saved image of the lot near Claremont and its lines keeps working without signal.
A word on accuracy
For land near Balloch, the acreage figure is an assessed number; only a licensed surveyor establishes the real lines on the ground. With a lot near Plainfield, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Sullivan County in a few facts
Newport is the county seat, which is where the courthouse records live. Smaller places on the map include Claremont, Acworth, Charlestown, and Cornish, each with its own cluster of lots. Roughly 43,969 people live in Sullivan County (Census estimate, 2023) spread over about 538 square miles. The county was organized in 1827, and some chains of title near Balloch are long.
Why people still buy them
Buyers and seed dealers around Goshen rely on them to see ownership across many tracts at once.
Buying or borrowing a copy
Older editions near Newport turn up in libraries and historical societies, which helps when tracing a farm's history.
Between editions
For current names, use the NHDOT Parcel Mosaic Viewer, across the county, whether the land is near Goshen or elsewhere in the county.
Not the same thing
Don't confuse the atlas with a recorded subdivision plat: recorded plats near Goshen are filed with the county Registry of Deeds, and the atlas is just a guide.
Land on the county line
Sullivan County borders Cheshire County, Grafton County, Hillsborough County, Merrimack County, and Windham County, VT; every one of them runs a separate parcel map. Ground near Plainfield that runs to the line can show up across two assessors' files, so check the adjacent map too. For a home near Croydon, the Platbookmapper state page lists every neighboring county map across New Hampshire.
Sections, lots and bearings
Rural deeds near Charlestown are often described by metes and bounds, a series of courses and distances from a starting point. Platted lots around Croydon usually use lot and block from a recorded plat instead, making them easier to find. Write down the legal description for the tract near Plainfield for any title or survey request.
A homemade atlas
Screenshot each section of the viewer around Newport and keep them in a binder for the truck.
Questions about the Sullivan County plat book
Is a plat book legal proof in Sullivan County?
If the land is near Cornish, recorded plats are legal documents at the county Registry of Deeds, and plat books are references.
Why does the plat book differ from the deed around Charlestown?
In most cases, atlas drawings near Claremont are simplified; they're good for orientation.
Should I use the NHDOT Parcel Mosaic Viewer instead for land near Charlestown?
For land near Charlestown, the NHDOT Parcel Mosaic Viewer is free and updated more often; a printed atlas is still handy offline.
Is there a current Sullivan County plat book?
Editions come and go.
What's the tax parcel number used for for land near Georges Mills?
It's the number the town assessor uses to track a tract near East Lempster; copy it before you call anyone.
Open the official Sullivan 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.