Stratham, NH Home Insurance Agency for Farmhouses, Great Bay and Newer Homes

By Jon Merwin, Founder and CEO

Stratham sits between Exeter and Portsmouth with Great Bay along its northern edge and the tidal Squamscott River on its western line. The Census Bureau estimates 7,735 residents as of July 1, 2025. According to the town’s 2019 Master Plan, Stratham was incorporated on March 20, 1716 as New Hampshire’s sixth town, and single-family homes on individual lots make up more than three quarters of its housing. That mix of colonial homesteads, working farms and two-acre subdivisions from the last forty years is what shapes home insurance here.

We are Portsmouth Atlantic Insurance, an independent insurance agency that Jon Merwin founded in 2005 and still runs as a family business. Our office on Islington Street in Portsmouth is a short drive up Route 33. We compare 40+ carriers on every Stratham home, charge no fees, and are licensed in 10 states. Our clients have left 1,000+ Google reviews and over 2,000 testimonials.

Homesteads, barns and Stratham’s heritage roads

The Master Plan describes historic homesteads scattered along the old trade routes: Route 33 (Portsmouth Avenue), Route 108 toward Newfields and Durham, and local roads such as Bunker Hill Avenue and Winnicutt Road that the earliest farm families used. Stratham’s Heritage Commission completed a partial historic inventory in 2007, and the Select Board has approved preservation easements on more than 18 barns under RSA 79-D, which trades tax relief for a promise to keep the barn standing for at least ten years.

Those houses and barns raise specific questions when we quote them:

• How much to insure the house for. A 1700s or 1800s farmhouse with plaster walls, wide boards and hand-hewn framing can cost far more to rebuild than a similar-sized house from the 1990s. We set the dwelling limit from rebuild cost, not the sale value.
• Barn coverage. A detached barn usually falls under other structures coverage, which may be too small for a big timber frame. If it carries a 79-D easement, tell us; the easement assumes the barn will be maintained, and a rebuild may need matching materials.
• Code upgrades after a loss. Ordinance or law coverage pays for bringing old wiring, framing and egress up to code during repairs, and the built-in limit is often thin for an antique house.

Our historic home insurance guide covers valuation and loss settlement choices in more depth.

Great Bay, the Squamscott and flood risk

Stratham’s coastal hazards and adaptation chapter (January 2018 draft) draws on the town’s 2017 Climate Risk in the Seacoast vulnerability assessment by the Rockingham Planning Commission. It projects flooding from sea-level rise and storm surge along Great Bay and the Squamscott and Winnicut Rivers and a long list of brooks, including Jewell Hill, Wheelwright Creek, Mill, Parkman, Thompson and Dearborn. Land near those shorelines is mostly residential. Residents told the planners that during storm surge the tide stays high longer, with no real low tide, so flooding lasts.

The 2019 Master Plan lists specific exposures: the Chapmans Landing boat launch and parking area, Stuart Farm and Scamman Farm along the Squamscott, four undersized culverts on Squamscott Road, well-head protection areas for neighborhoods west of Route 33, and 128 parcels including 6 homes in the mapped scenarios. The chapter also recommends encouraging residents to buy flood insurance through the National Flood Insurance Program.

A homeowners policy excludes flood, whether the water comes from the bay, a brook over its banks or groundwater rising into a basement. For Stratham homes near tidal water or a stream we quote flood with the homeowners policy, writing NFIP coverage through Selective and comparing private flood when a home needs higher limits. Look up your address on the FEMA Flood Map Service Center and read about the usual 30-day NFIP waiting period on FloodSmart. More in our flood insurance page.

Every house on its own well and septic

The Master Plan is plain about utilities: there is no sewer service in Stratham, so every property has its own septic system, and residents depend mainly on private wells. Five aquifers lie under the town, among them the Stratham Hill and Bunker Hill aquifers. The town has also studied septic system vulnerability as groundwater rises near the coast, and the coastal chapter warns about saltwater intrusion into wells.

Here is how that plays out on a policy. A failed well pump in January can freeze pipes. A septic backup into a finished basement is excluded unless you add water backup coverage. Buried lines between the house, the well and the leach field may be covered under a service line endorsement, depending on the carrier. Normal wear and a septic system at the end of its life are maintenance, not insured losses. NHDES recommends testing private wells regularly.

The Gateway corridor and newer neighborhoods

Most of Stratham’s housing went up as farmland was subdivided into two-acre lots. Those 1980s through 2000s colonials and capes are straightforward for most carriers, though an original roof or water heater from the year the house was built will draw questions. Commercial growth is aimed at the Gateway District along Portsmouth Avenue from the Route 101 interchange to about Raeder Drive, and at the Town Center. The Master Plan sees mixed-use housing there in the future, which would bring condominiums and townhouses. If you buy one, we match an HO-6 policy to the association’s master policy, including loss assessment.

Storms, trees and long power outages

The coastal chapter’s storm list for Stratham runs from the 1972 nor’easter and the Blizzard of 1978 through Hurricane Bob and the October 1991 “Perfect Storm,” the heavy rains of October 1996 and Mother’s Day 2006, the 2007 Patriot’s Day nor’easter and Superstorm Sandy in 2012. The town has had a hazard mitigation plan since 2007. With mature trees along winding roads and homes set back on wooded lots, the common claims here are trees on roofs, ice dams and pipes that freeze during an outage. A standby generator, a monitored low-temperature alarm and roof snow removal all help. Our post on snow and ice damage explains how those claims are handled.

Farms, horses and home businesses

Agriculture is still part of Stratham’s identity, from farm stands to the annual Stratham Fair. A homeowners policy is written for a residence. If you board horses, sell produce, run a home business or rent out an accessory apartment, tell us up front. Some of that can be endorsed onto a homeowners policy, and some needs a farm or separate liability policy. Missing it can leave a claim uncovered.

Auto, umbrella and teen drivers

Route 101, Route 108 and Route 33 carry heavy commuter traffic through town, and many families have a new driver in the house. We quote auto alongside the home so the liability limits match, and recommend a personal umbrella for homeowners with significant assets. If your rebuild cost is high, see high-value home insurance in New Hampshire.

Nearby towns we insure

Next door, see Exeter, Newfields, North Hampton and Portsmouth. For coastal coverage in general, read coastal home insurance in New Hampshire, or start with New Hampshire homeowners insurance and our Seacoast insurance hub. Next door to the east, our Greenland, NH page covers the south shore of Great Bay.

Sources

• Town of Stratham, Master Plan, adopted November 20, 2019 (with Baseline Report)
• Town of Stratham, Coastal Hazards and Adaptation Master Plan Chapter, draft January 2018
• Town of Stratham, Town Plans and Guidance Documents
• Town of Stratham, Septic System Vulnerability Assessment
• Town of Stratham, Hazard Mitigation Plan (2007)
• U.S. Census Bureau subcounty estimates, Vintage 2025, New Hampshire towns
• NHDES drinking water: private wells
• FEMA flood maps by address
• FloodSmart.gov, how to purchase an NFIP policy

Request a Stratham home insurance quote

Send us a few details about your Stratham home: the year it was built, any barns or outbuildings, whether it sits near Great Bay, the Squamscott or a brook, your well and septic setup, and your current declarations page. We will compare carriers and come back with options. Request a quote. There’s no obligation to buy. Prefer to talk? Call (603) 431-4020.

Frequently asked questions

Is there an insurance agency that handles home insurance in Stratham, NH?

Yes. Portsmouth Atlantic Insurance is an independent agency a short drive up Route 33 at 601 Islington St, Unit 206, Portsmouth. We compare 40+ carriers for Stratham homes, charge no fees, and handle everything by phone, email, online or in person.

Do I need flood insurance in Stratham if I am not on the water?

It depends on the property. Town plans map flooding along Great Bay, the Squamscott and Winnicut Rivers and many brooks, and homeowners policies exclude all flood. Check your address on the FEMA flood map and ask us to quote it; coverage is often available outside high-risk zones too.

How do I insure a barn with a preservation easement in Stratham?

Tell us about the easement. A detached barn usually falls under other structures coverage, which is often too low for a large timber frame, so we may schedule it at its own value. Because the easement assumes the barn stays standing, a loss settlement that pays to rebuild with matching materials matters.

Does homeowners insurance cover my well and septic system?

Sudden damage from a covered cause, like a lightning strike that ruins a well pump, may be covered. Wear and tear and an aging septic system are maintenance. Sewage or septic backing up into the house needs a water backup endorsement, and buried lines may need service line coverage.

Will an older roof or original systems affect coverage on a Stratham colonial from the 1980s or 1990s?

They can. Carriers ask about the age of the roof, water heater, heating system and plumbing, and an original roof on a 30- or 40-year-old house may limit your choices or bring actual cash value roof terms. Receipts for updates help, and because we compare 40+ carriers we can find one whose guidelines fit.

General guidance for Stratham property owners, not a coverage promise. The town’s plans and FEMA’s maps are revised from time to time; Stratham’s planning office can confirm what applies to your lot. What gets paid on a claim depends on your policy and the insurer, and flood always needs its own policy. Call (603) 431-4020 with questions about a specific property.