Blog · October 14, 2026 · Connecticut
New London County Flood Zone Map (Connecticut)
FEMA's free flood maps and the New London County parcel viewer, used together for property near East Lyme.
Main page: New London County, CT GIS & Parcel Viewer (official map link, New London County facts and neighboring maps).
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A New London County flood zone map check belongs in the due diligence for any New London County property, from a house lot in Franklin to farm ground near Colchester. For any tract in New London County, Connecticut, the answer affects insurance, permits and resale.
The sections below go from the FEMA search to the New London County parcel record, then cover insurance, permits and map changes near Colchester.
Look up the New London County flood zone map step by step
Open the FEMA Flood Map Service Center and type a county street address, say one in Norwich. Download the FIRM panel FEMA lists as effective for that part of New London County. For an interactive view of the county, try FEMA's National Flood Hazard Layer viewer and reports the zone wherever you click near Norwich. Switch to the CT Parcel Viewer and locate the same tract around Bozrah. Match the New London County lines and acreage to the FEMA view, since flood maps do not draw property lines in detail.
Finding the tract on the New London County map
For New London County, the free public parcel layer is state-run: open the CT Parcel Viewer and pan to East Lyme. Use the search box for an address in Bozrah or a parcel number, or simply zoom in and click a tract around East Lyme. Bookmark our New London County page too; it tracks the official Connecticut link if it moves and lists the maps around Bozrah.
Reading the zones on a New London County flood map
Any New London County parcel shaded as Zone A, AE, AH or AO sits in what FEMA calls a Special Flood Hazard Area, meaning FEMA estimates a 1-percent annual chance of flooding. Zone AE near Bozrah means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Land near Bozrah in shaded X (Zone B on older maps) sits in the moderate band between the 100-year and 500-year floods. Unshaded Zone X near Bozrah is minimal risk.
Low ground and small streams around Norwich
Small streams and ditches near Norwich may not be studied in detail, which is why it's worth walking the ground after a heavy rain.
A short buyer checklist for Colchester
Buying near Colchester? Ask the seller whether the house has flood insurance now and whether it has ever had a claim; an agent in Connecticut can also pull the flood disclosure if the state requires one. Then call an insurance agent who writes policies around Colchester and get a quote using the zone and the county parcel address.
Map dates and floodways in New London County
Zones on the map covering Colchester can change after a restudy, so the date on the county panel matters. Floodways, shown as hatched areas on some panels, are the channel and nearby land that must stay open, and building there near Franklin faces the strictest rules.
When the map affects a deal
Lenders watch the zone closely on New London County properties. When a New London County home sits in a Special Flood Hazard Area and carries a federally backed mortgage, the lender must require flood coverage, as long as New London County or the town participates in the NFIP. In Zone X near Norwich, insurance is a choice, not a mandate, though a lender in Connecticut can still ask for it. When a county homesite is on a rise inside a mapped zone, the titleholder can ask FEMA for a Letter of Map Amendment (LOMA); a surveyor near Bozrah can supply the elevation data. Adding on to a house near Bozrah inside the zone commonly requires a permit and an elevation check; the county floodplain administrator can say what applies.
Questions about the New London County flood zone map
Does a 100-year floodplain near Norwich flood only once a century?
No, ground around East Lyme mapped that way faces a 1-percent annual chance, not a once-a-century schedule.
Do I need a permit to build in the floodplain near East Lyme?
Building in a Special Flood Hazard Area near East Lyme typically needs a floodplain permit and may require elevating the structure, so check with the county floodplain administrator.
What is a base flood elevation for a New London County property?
On the map covering East Lyme, the BFE is the height floodwater is expected to reach in the 1-percent-annual-chance flood; elevation certificates in New London County are measured against it.
Is flood insurance required for a Zone X lot in East Lyme?
Not under federal rules; Zone X in New London County is outside the Special Flood Hazard Area, though a lender can still require coverage.
What does Zone AE mean on a New London County flood map?
For a New London County parcel, Zone AE means a Special Flood Hazard Area with a 1-percent annual chance of flooding and a published base flood elevation.
Open the official New London County, CT parcel map New London County 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.