Dunbarton, NH Home Insurance

By Jon Merwin, Founder and CEO

Home · Flood · Condo · Renters · Umbrella · Dunbarton, New Hampshire

Portsmouth Atlantic Insurance is an independent agency founded in 2005 and licensed in 10 states. We are the most-reviewed independent insurance agency in New Hampshire, with 1,000+ Google reviews and over 2,000 testimonials across our two offices. We shop each Dunbarton home across 40+ carriers. Start with New Hampshire homeowners insurance, or read on.

Dunbarton at a glance

The U.S. Census Bureau estimates 3,233 Dunbarton residents as of July 1, 2025 (3,005 in the 2020 census). The town’s Hazard Mitigation Plan Update 2023, prepared with the Central New Hampshire Regional Planning Commission, describes about 31.3 square miles including half a square mile of water, 1,148 housing units in 2020, and 1,545 parcels in 2022.

The plan describes the north-central part of town as highly rural and forested with little commercial development, while the south-western section holds most of the commercial, industrial and residential development. From 2017 to September 2022 the town issued 71 permits for new single-family homes and 12 for accessory dwelling units, and none for multi-family or manufactured homes.

Carriers underwrite Dunbarton houses around rebuild cost, roof age, heating and wiring, distance to a hydrant or fire station, the well and septic, and how the house is reached on a town road in a storm.

Where you live in Dunbarton changes the policy

• Gorham Pond and the other ponds. The plan lists Gorham Pond, Kimball Pond, Long Pond, Stark Pond and Purgatory Pond among the town’s main bodies of water, and names the Gorham Pond area neighborhoods, including Holiday Shore Drive, among its denser neighborhoods. Pond-side and seasonal homes need a flood conversation and accurate details on occupancy and heat.
• Along the brooks. The plan names One Stack, Bela, Stark, Harry and Black brooks as the most prominent streams and says any of these waters could flood local roads, homes and waterfront properties. A house near one needs a FEMA map pull before closing or renewal.
• Gravel and washout-prone roads. The town maintains more than 43 miles of Class V roads, and the plan lists washout locations still awaiting repair on Guinea Road at Black Brook, Barnard Hill, Black Brook, Grapevine, Kimball Pond, Long Pond, Montalona, Morse, Tenney Hill and Twist Hill roads. Tell us how the house is reached and how far it sits from the road.
• Near the Hopkinton-Everett reservoir. The plan notes that Everett Lake borders Dunbarton in Weare and that Everett Lake dike structures on Stark Brook are red-listed bridges. Homes on the western side still need parcel-level flood and access details.

Flood coverage in Dunbarton

Dunbarton has participated in the NFIP since March 28, 2001. The plan explains that FEMA originally found no floodplains in town, then mapped them in the current digital FIRMs and Merrimack County Flood Insurance Study, both effective April 19, 2010, and it flags preliminary 2022 county maps that could change zones if adopted. We check the current map for each address.

The plan’s NFIP history has never shown more than four policies at a time. As of April 2023 there were 4 policies with $969,000 of coverage, one loss claim since 1979 with nothing paid, and no repetitive-loss properties. Against an estimated 53 parcels with buildings at least partly in mapped special flood hazard areas, that means most floodplain buildings carry no flood policy. The plan also warns that runoff, blocked culverts, snowmelt and beaver dam breaks can flood property anywhere in town.

A homeowners policy will not pay for a brook or pond over its banks, or for surface water and road washouts that send water into the house. Flood is its own policy. Check your address on the FEMA Flood Map Service Center.

• NFIP through Selective. We write National Flood Insurance Program policies through Selective, a Write Your Own carrier. The NFIP covers up to $250,000 for the building and $100,000 for contents. New policies generally have a 30-day waiting period (see FloodSmart), so buy before storm season, not during it.
• Private flood. When a home costs more than the NFIP building limit to rebuild, or you want coverage the NFIP leaves out, we compare Flow Flood, Neptune Flood, Beyond Floods, The Flood Insurance Agency, CatCoverage and Aon Edge. Each one decides address by address.
• Elevation certificates. If you have one, send it. If the house has been raised or has flood vents, it can make a real difference in how flood carriers rate it.

See our flood insurance overview. Water backup (sewer, drain or sump pump failure) is an add-on to homeowners; flood is separate. If your basement is finished, ask about both. See basement flooding coverage and our flood insurance overview.

Winter, wind and wildfire

The plan’s risk table scores severe winter weather 10.7 out of 16, the highest of the 14 natural hazards it ranks, followed by high wind events (9.3) and drought, extreme temperatures and wildfire (8.0 each); inland flooding scores 6.0. In a heavily wooded town, that means fallen trees, ice dams, frozen pipes, wind and fire are the claims most homeowners plan for. These are generally homeowners claims, subject to your deductible and policy terms.

Winter, trees and wind in Dunbarton

New Hampshire winters bring ice dams, frozen pipes and heavy snow loads, and storms bring down trees and limbs. These are generally homeowners claims, subject to your deductible and policy terms. A properly sized wind and all-perils deductible, and a roof in good shape, do more for most homeowners than any single add-on. Water damage from a burst pipe is usually covered when the home is heated and occupied; long vacancies can change that, so tell us if the house will sit empty.

Larger homes

Under about $2 million, most of our 40+ carriers are in play. In New Hampshire, Andover generally writes up to about $1.5 million, or closer to $1 million for homes far from a hydrant or fire station. Around $2 million to $3 million, Hanover is often a fit; above $3 million, Cincinnati; and at $5 million and up, Chubb. Each carrier underwrites the specific house, so these are starting points, not promises.

For horse farms, rural estates and custom homes in town, see high-value home insurance in Dunbarton. See high-value home insurance in New Hampshire.

Condos, rentals, ADUs and older homes

Your HO-6 condo policy covers what the association’s master policy does not. See condo insurance in New Hampshire. If you rent out a house, an accessory dwelling unit or a manufactured home in Dunbarton, tell us, because a rental changes the coverage you need; see landlord insurance. For New Hampshire landlord and habitational placements we work with Vermont Mutual, Andover, Safety, Concord Group and Providence Mutual. On an older farmhouse or camp, carriers will ask about the roof, heating, wiring, plumbing, well and septic.

Renters and tenants in Dunbarton

If you rent in Dunbarton, your landlord’s policy covers the building, not your belongings or your liability. A renters policy covers both, plus extra living costs after a covered loss. We shop renters coverage across our carriers, and Progressive Home is one of them; we use Progressive Home for renters policies only. Landlords who own two- to four-family buildings can see landlord insurance.

Auto, umbrella and the rest of the household

Most Dunbarton households also need auto insurance, and many add a personal umbrella. We quote them with the home so the liability limits line up, and we put rentals, second homes, boats and valuables under the same review. One agent, one renewal conversation.

Common coverage gaps we see in Dunbarton

• A dwelling limit based on the purchase price or assessed value instead of the cost to rebuild
• No water backup coverage on a house with a finished basement
• Personal property limits that have not kept up with what the household actually owns
• Liability limits on the home and auto that do not line up with an umbrella, or no umbrella at all
• No ordinance or law coverage on an older home that would need code upgrades after a loss
• No flood policy on a pond-side or brook-side home in a mapped flood zone
• A seasonal camp or vacant stretch the carrier does not know about
• Well, septic, wood stove or gravel-road access details left off the application

Most of these are straightforward to fix once someone reads the declarations pages side by side, and that is the first thing we do in a review.

Before storm season in Dunbarton

• Know your hurricane or named storm deductible in dollars, not just as a percentage
• Photograph or video each room so a contents claim is easier to document
• Keep your declarations pages, flood policy and any elevation certificate somewhere you can reach from your phone
• If you are thinking about flood coverage, buy it well ahead of a storm because of the waiting period
• Line up a tree service and a plow contact before the first nor’easter, since the plan ranks winter weather and wind as the town’s top hazards
• If you heat with wood, have the chimney cleaned and tell us about the stove

Buying a home in Dunbarton

Start the insurance conversation before you are under contract, not the week of closing. Send us the listing and the inspection report when you have it. The report answers most of what carriers ask: roof age, electrical panel, heating, plumbing and any water in the basement. Ask whether any part of the lot is in a FEMA special flood hazard area, whether the seller has an elevation certificate, and whether the home has a flood or water-loss history. For a gravel-road, pond or farmhouse property, get well, septic, heat and access details into the insurance file before closing. We line up the homeowners binder, and a flood binder if you need one, so both are ready for your lender.

How a Dunbarton home quote works

• Tell us about the house: address, year built, square footage, roof age and updates to wiring, plumbing and heating.
• Send your current declarations page so we can compare like for like and point out limits that look short.
• We shop the carriers that fit and lay the options out side by side, with the differences in coverage, deductibles and storm terms, not just price.
• You choose, and we handle the switch, including your mortgage company and the effective date, so there is no gap.

Serving Dunbarton from Portsmouth

Our office is at 601 Islington St, Unit 206, Portsmouth, NH 03801, and we work with Dunbarton clients by phone, email and online. Call (603) 431-4020. Nearby, see our Bow, Goffstown, Concord and Weare pages.

Sources

• Town of Dunbarton, Hazard Mitigation Plan Update 2023 (CNHRPC; Selectmen adopted April 13, 2023; FEMA approved April 18, 2023)
• U.S. Census Bureau, Vintage 2025 subcounty population estimates
• FEMA Flood Map Service Center
• FloodSmart, buying a flood policy

Get a quote

Tell us about the property and we will compare carriers and follow up with options. Prefer to talk? Call (603) 431-4020.

Frequently asked questions

Do you insure homes in Dunbarton, NH?

Yes. We insure Dunbarton homes from our Portsmouth office at 601 Islington St, and by phone, email and online. Call (603) 431-4020.

Does Dunbarton flood?

Mostly along its brooks and ponds and on washout-prone roads. The town’s 2023 hazard mitigation plan estimates 53 parcels with buildings at least partly in mapped flood zones, but as of April 2023 there were only 4 NFIP policies in town, one loss claim since 1979 with nothing paid, and no repetitive-loss properties. Check your address on the FEMA Flood Map Service Center.

Does homeowners insurance cover a flooded basement?

Not from flood. Water backup from sewers, drains or a sump pump is an add-on, and rising or surface water needs a flood policy.

Who writes your NFIP flood policies?

We write NFIP policies through Selective, and we compare private flood from Flow Flood, Neptune Flood, Beyond Floods, The Flood Insurance Agency, CatCoverage and Aon Edge.

Do you charge fees?

No. We don’t charge fees on any policy we write, including homeowners, condo, renters, landlord, dwelling and auto.