03820 Hurricane Risk & Insurance Guide (2026)
03820 in Dover, NH: hurricane and flood risk, est. insurance $2,892–$5,544/yr, and buyer guidance before you close.
Dover, New Hampshire 03820, United States
Data retrieved: Jul 30, 2026 at 17:46 UTC
Overall Risk
Above the national median (top 35% most at-risk)
County-level composite
Est. Annual Insurance
$2,892 – $5,544
Directional range
Premium Strain
4.58% of median income
high
Flood Insurance
Likely required
FEMA NFHL flagged SFHA
Quick buyer brief
What makes 03820 different
A short, indexable summary for buyers comparing 03820 with nearby options in Dover.
03820 ranks above the national median (top 35% most at-risk) for overall climate risk, with the biggest current drivers being hurricane or flood.
Buyers in this ZIP should budget roughly $2,892 - $5,544/yr for homeowners insurance before carrier-specific adjustments. FEMA data suggests some addresses may require flood insurance.
If you are choosing between nearby ZIP codes, compare this page with the city overview and the nearby-ZIP links below before you write an offer.
Insurance Market Context
These scores are county-level composites derived from FEMA National Risk Index. Individual parcels may differ significantly. This is not a property appraisal.
Market Pressure
LOW
New Hampshire has a stable admitted-carrier market. Standard brokers can write policies here.
Admitted Market Share
87%
Carriers exiting at 1.4% YoY in New Hampshire.
Residual Market
$1,400–$2,800
annual · last-resort
FAIR Plan / Citizens exposure up 6% since 2020.
Premium Strain Index
Insurance is roughly 4.6% of median household income — well above the 2% middle-income affordability benchmark (First Street flags anything above 5% as financially unsustainable).
Premium-to-income ratio. Based on state Department of Insurance filings, average annual premiums in this area range from $2,892 to $5,544. Not an insurance quote. The First Street 12th National Risk Assessment characterizes any ZIP above 5% as financially unsustainable.
Strafford County Hazard Breakdown
Scores below are from the federal National Risk Index at the county level, refined with parcel-level signals where available (FEMA NFHL for flood, USDA WHP for wildfire, USGS PGA for earthquake, NWS for heat).
Above the national median (top 23% most at-risk)
Hurricane
HighAbove the national median (top 35% most at-risk)
Earthquake
HighAround the national median
Extreme Heat
ModerateAbove the national median (top 24% most at-risk)
Flood
HighBelow the national median (safer than most)
Wildfire
LowAround the national median
Severe Storm / Tornado
ModerateLocal Flood Risk Cost Estimator
Flood insurance costs in Dover, NH
In Dover, NH, the directional annual NFIP flood insurance premium is approximately $2,034 (range $1,500–$3,500), and the estimated average historical flood claim in Strafford is $66,872. Typical mapped exposure aligns with Zone A / AE (SFHA) (county flood percentile: 76).
- NFIP premium (mid)
- $2,034/yr
- Monthly escrow slice
- $125–$292/mo
- Avg. paid claim
- $66,872
- Lender may require
- Likely yes (SFHA)
Hurricane Windstorm Deductible Estimator
Named windstorm deductible exposure in Dover, NH
In Dover, NH, a 1.77% hurricane / windstorm deductible on a $450,000 insured dwelling implies roughly $7,965 out-of-pocket before the carrier pays (hurricane percentile: 77).
- Deductible %
- 1.77%
- Out-of-pocket
- $7,965
- Emergency fund target
- $11,948
Earthquake Insurance ROI Estimator
CEA-style earthquake coverage math in Dover, NH
In Dover, NH, directional earthquake coverage runs about $2,265/yr with a $112,500 deductible exposure (earthquake percentile: 65). Over 30 years, modeled premium spend is $67,950 vs. $18,806 illustrative expected loss.
Borderline — model expected loss near 30-year premium cost.
- Est. annual premium
- $2,265/yr
- Deductible
- $112,500
- 30-yr premium vs loss
- $67,950 / $18,806
What each hazard means for you
Expand any card to see the federal source citation and the buyer-specific action items our research team recommends for this hazard profile.
Hurricane Risk
NRI hurricane risk: Above the national median (top 23% most at-risk) for hurricane exposure (county-level, based on historical storm tracks and wind-speed exceedance).
FEMA · National Risk Index (HRCN)
Earthquake Risk
Above the national median (top 35% most at-risk) for earthquake exposure. USGS PGA: 0.203g (site class D). NRI county percentile: Above the national median (top 23% most at-risk).
USGS · Design Maps (ASCE 7-16) + NRI
Extreme Heat
Long-term heat risk: Around the national median (NRI county baseline). This reflects multi-decadal extreme-heat exposure, not the current week's weather.
NOAA · National Risk Index (HWAV)
Flood Risk
County NRI flood risk: Above the national median (top 24% most at-risk) for flood exposure. NFHL parcel query unavailable.
FEMA · National Risk Index
Wildfire Risk
Blended wildfire risk: Below the national median (safer than most). USDA Wildfire Hazard Potential at parcel: Very Low (Class 1/5). County NRI wildfire risk: Below the national median (safer than most). The parcel-level USDA score moderates the county NRI signal.
USDA · WHP + National Risk Index
Severe Storm / Tornado
NRI severe-storm risk: Around the national median for severe-thunderstorm, hail, straight-line wind, and tornado exposure (county-level).
FEMA · National Risk Index (TRND)
FEMA Flood Zone
Is this specific parcel in a Special Flood Hazard Area?
The free address snapshot queries FEMA NFHL point-in-polygon and returns your exact FEMA Flood Zone (A, AE, X, etc.) in seconds.
Run a free address lookupCarrier Outlook
New Hampshire has a stable admitted-carrier market. Standard brokers can write policies here.
Data Sources
Data Sources & Methodology
FEMA— National Risk Index
Retrieved July 30, 2026
FEMA— National Risk Index (HRCN)
Retrieved July 30, 2026
USDA— WHP + National Risk Index
Retrieved July 30, 2026
USGS— Design Maps (ASCE 7-16) + NRI
Retrieved July 30, 2026
NOAA— National Risk Index (HWAV)
Retrieved July 30, 2026
FEMA— National Risk Index (TRND)
Retrieved July 30, 2026
What buyers should know
Buying in 03820: a risk primer
Before you write an offer on a home in Dover, understand how climate and insurance costs affect long-term ownership in 03820.
03820 in Dover, New Hampshire, scores above the national median (top 35% most at-risk) on our composite climate-risk index. That ranking reflects the combined influence of hurricane wind exposure (77), flood risk (76), and earthquake shaking risk (65) in this ZIP code. Before writing an offer, buyers should understand which hazard drives the score and how it shows up in insurance premiums and long-term maintenance costs.
The data below is assembled from five federal sources — FEMA (flood and National Risk Index), NOAA (storm history and heat), USGS (seismic design), and USDA (wildfire hazard potential) — and is refreshed quarterly. Use it as a starting point for due diligence, not a substitute for a licensed inspector, structural engineer, or insurance agent.
Hurricane risk in 03820
The hurricane wind exposure score for 03820 is 77 (high), which is above the national median. 03820 is in a high hurricane wind zone. Standard homeowners policies in New Hampshire often have separate hurricane/wind deductibles (frequently 2–10% of dwelling coverage). Buyers should model a named-storm deductible on top of the base premium before finalizing a budget.
For a specific address inside 03820, this score can shift meaningfully. A home on a ridge may have lower flood exposure than one in a valley; a parcel surrounded by irrigated lawn may have lower wildfire exposure than one against open space. The $19 Risk Before Buy report resolves these parcel-level differences and includes a 30-year projection for each hazard.
Flood risk in 03820
The flood risk score for 03820 is 76 (high), which is above the national median. 03820 maps to a FEMA Special Flood Hazard Area or near-SFHA zone in Dover. With FEMA's Risk Rating 2.0 now pricing policies by parcel-level risk rather than just zone, buyers here should expect flood premiums to rise over the life of ownership. A LOMA (Letter of Map Amendment) may help if the finished floor is clearly above the BFE, but the process takes 60–90 days.
For a specific address inside 03820, this score can shift meaningfully. A home on a ridge may have lower flood exposure than one in a valley; a parcel surrounded by irrigated lawn may have lower wildfire exposure than one against open space. The $19 Risk Before Buy report resolves these parcel-level differences and includes a 30-year projection for each hazard.
Earthquake risk in 03820
The earthquake shaking risk score for 03820 is 65 (high), which is above the national median. 03820 sits in a seismically active area with high expected shaking (PGA). Standard homeowners insurance does not cover earthquake damage; a separate earthquake policy is required. In New Hampshire, deductibles are typically 10–20% of the dwelling limit, so the policy only matters for catastrophic loss.
For a specific address inside 03820, this score can shift meaningfully. A home on a ridge may have lower flood exposure than one in a valley; a parcel surrounded by irrigated lawn may have lower wildfire exposure than one against open space. The $19 Risk Before Buy report resolves these parcel-level differences and includes a 30-year projection for each hazard.
Insurance is where climate risk becomes a monthly payment. In 03820, our directional estimate for a standard homeowners policy plus required hazard coverage is $2,892 – $5,544 per year. That estimate assumes a mid-range home and does not include optional coverages such as earthquake, flood (where not required), or higher wind deductibles.
Relative to local incomes, that premium range equals approximately 4.58% of the Strafford County median household income — a high premium-to-income burden. As a rule of thumb, premiums above 3–4% of household income begin to compress affordability and can reduce the pool of future buyers when you eventually sell.
Buyer action items
- Get carrier quotes early. Ask at least two admitted-market carriers and one surplus-line broker for a homeowners quote that explicitly includes hurricane wind exposure, flood risk, and earthquake shaking risk. Do this before the inspection contingency expires.
- Add a climate contingency to the purchase agreement. Our free New Hampshire-specific contract templates let you make the deal contingent on acceptable insurance premiums, flood-zone status, or seller-provided mitigation documentation.
- Order hazard-specific inspections if the top risks warrant it. In 03820, that may mean a flood-zone determination, a wildfire/defensible-space assessment, a structural/seismic review, or a wind-mitigation inspection depending on which hazards score highest.
Frequently asked questions about 03820
Ready to underwrite 03820?
Get the full address-level report
Both tiers use verified federal data. The $19 snapshot is your pre-offer feasibility check (delivered within 5 minutes). The $99 audit adds parcel flood verification, market context, claim history, and a negotiation brief (within 24 hours).
Full Report
Tier L2
Address-level hazard and insurance feasibility snapshot — five hazards, 30-year projections, carrier pressure signals, and a buy / negotiate / walk-away read for pre-offer buyers. PDF delivered within 5 minutes.
- Five-hazard score breakdown: flood, wildfire, hurricane, earthquake, heat
- 30-year federal climate projections for heat, wildfire, and sea level rise
- Insurance premium estimate range based on state DOI filings
- Clear buy / negotiate / walk-away recommendation with plain-language reasoning
- Comparable lower-risk communities within 25 miles (up to 3 when available)
- Plain-English explanations of SFHA, BFE, residual market, and other insurance terms
- Single PDF you can share with your partner, agent, or inspector
Best for: pre-offer sanity check
Delivered: PDF by email within 5 minutes
Federal data: FEMA, USGS, NOAA, USDA, EPA
Delivered by email within 5 minutes of payment.
Pre-Purchase Audit
Tier L3
Under-contract diligence package: parcel flood zone verification, state insurance market analysis, NOAA claim history, and an evidence-backed negotiation brief to assess earnest-money risk. PDF delivered within 24 hours.
- Everything in the $19 Full Report
- Parcel-level FEMA flood zone verification (Zone A/AE/VE/X — point-in-polygon)
- State insurance market analysis: admitted carrier share, exit rate, residual market growth
- Premium Strain Index — insurance cost as % of local median income, with 2% / 5% affordability benchmarks
- 10-year NOAA Storm Events claim history for the ZIP code
- Negotiation leverage brief with specific, evidence-backed seller-concession asks (typically 3–5; fewer when data is limited)
- Total carrying cost estimate: HO-3 baseline + standalone perils + residual market fallback
- Identifies whether the property may become hard to insure before you close
- Gives you specific talking points for price, credits, and contingency negotiation
Best for: under-contract buyers
Delivered: PDF by email within 24 hours
Includes: 7-day no-questions-asked refund
Delivered by email within 24 hours of payment.
Nearby ZIP risk profiles in Strafford
Compare climate and insurance risk across neighboring ZIP codes before you commit to a specific address in Dover.
Explore 03820 in context
Indexable hub links for buyers comparing 03820 with the wider Dover market and New Hampshire insurance trends.
Dover climate risk overview
City-level hazard scores and insurance context for Dover, NH.
New Hampshire buyer guides
State-wide insurance market pressure and regional hazard patterns.
Dover flood insurance costs
County flood percentile, NFIP premium bands, and lender requirements.
High-risk area buyer checklist
Questions to ask before writing an offer in 03820.
Free contract templates for New Hampshire buyers
Download free climate-risk contingency addendums written for New Hampshire purchase agreements. Add hurricane, flood, or earthquake contingencies to your offer.
Browse free templates