Wildfire has reshaped the property insurance market in several states. Understanding how insurers assess it explains both why premiums moved and what, if anything, a homeowner can influence.
How exposure is assessed
Insurers use wildfire risk models that score individual addresses. The inputs typically include:
- Vegetation density and type around the property.
- Slope and terrain. Fire moves faster uphill, so properties above steep slopes score worse.
- Distance to wildland and to previous fire perimeters.
- Access. Road width and whether there is more than one route out.
- Fire protection. Distance to a responding station and water availability.
- Construction. Roof material, siding, decking, vents, and windows.
These scores are generated by third-party models, and homeowners frequently cannot see the score assigned to their address. Several states have introduced requirements around disclosure and around recognising mitigation. Your Department of Insurance can tell you what applies where you live.
Mitigation that is commonly recognised
Not everything a homeowner can do affects the score, but several things are increasingly recognised in states that have addressed this by regulation.
- Defensible space in zones around the structure, with clearance requirements that differ by distance.
- Ember-resistant construction in the first few feet around the building — no combustible mulch, no stored firewood against walls.
- Class A roofing and ember-resistant vents.
- Enclosed eaves and non-combustible siding and decking.
- Multi-pane tempered windows.
- Community-level certification under recognised programs, which some insurers credit.
Where a state mandates recognition of specific measures, documentation matters — inspections, photographs, and receipts.
What happens when insurers withdraw
The sequence in affected areas has been consistent: premium increases, then non-renewals, then reduced new business writing, and finally growth in the state's FAIR plan.
If you receive a non-renewal, the practical steps are the same as any other: check the notice period, ask what would change the decision, start shopping immediately through an independent agent, and ask about the FAIR plan if the standard market is unavailable. Never let coverage lapse while deciding.
Moratoriums
Several states have adopted rules that restrict non-renewal for a period after a declared wildfire emergency in affected areas. These are time-limited and geographically defined, and they do not apply everywhere.
If you receive a non-renewal shortly after a declared event, it is worth asking your Department of Insurance whether a moratorium applies to your address.
What coverage looks like
Fire is a covered peril under standard homeowners policies, including wildfire. What tends to change in high-risk areas is availability and price rather than whether fire itself is covered.
Two things worth checking on a policy in a wildfire area: whether the dwelling limit reflects current rebuild costs, which rise sharply after a widespread event, and whether ordinance or law coverage is present, since rebuilding to current codes after a total loss frequently costs more than the original construction standard.
What we are not saying
We are not telling you what mitigation to undertake or that it will keep your coverage. Insurers make their own decisions and mitigation does not guarantee an outcome.
What we are saying is that address-level risk scores are driving these decisions, that several states now require insurers to recognise specific mitigation measures, and that documentation is what makes mitigation count.
Where to verify this yourself
- Your state Department of Insurance — mitigation discount requirements, moratorium rules, and FAIR plan access.
- Your insurer — which mitigation measures they recognise and what documentation they need.
- Your declarations page — dwelling limit and whether ordinance or law coverage is present.
How address-level scoring works
Insurers no longer assess wildfire exposure by county or postcode. Third-party models score individual addresses, and the score is what drives pricing, eligibility, and renewal decisions.
| Input | What it measures | Can you change it? |
|---|---|---|
| Vegetation density and type | Available fuel around the structure | Yes — within your property |
| Slope and terrain | Fire moves faster uphill | No |
| Distance to wildland | Proximity to continuous fuel | No |
| Access and egress | Road width, and whether there is more than one route out | No |
| Fire protection | Distance to a station, water availability | No |
| Roof material | Ember resistance | Yes |
| Siding, decking, vents | Ember entry points | Yes |
| Windows | Radiant heat resistance | Yes |
Half the inputs are fixed features of where the property sits. The other half are construction and vegetation choices you control. That split is the whole strategy: you cannot move the house down the hill, but you can change what it is made of and what surrounds it — and several states now require insurers to recognise exactly those changes.
Defensible space, zone by zone
Requirements are set by state and by local authority, and where a state mandates recognition of mitigation, the zones are usually defined in the regulation. The general structure is consistent.
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Zone 0 — immediate
The first few feet around the structure
The highest-value zone and the one most often ignored. No combustible mulch, no stored firewood against walls, no vegetation touching the building, nothing flammable under decks.
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Zone 1 — intermediate
Extending outward from the structure
Spacing between shrubs and trees, removal of dead material, tree limbs cleared away from the roof and chimney.
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Zone 2 — extended
The outer band
Reducing continuous fuel so fire arrives with less intensity. Grass kept short, dead trees removed, canopy separation maintained.
Structure hardening, in order of impact
What insurers most commonly recognise
- Class A roofing — the single most significant construction factor
- Ember-resistant vents — embers entering through vents are a primary ignition path
- Enclosed eaves, removing another entry point
- Non-combustible siding within the first few feet from ground level
- Non-combustible decking, and nothing stored beneath it
- Multi-pane tempered windows, which resist radiant heat
- Sealed gaps at roof-to-wall junctions and around penetrations
- Community-level certification under recognised programmes, which some insurers credit
Ignition in a wildfire is frequently caused by wind-blown embers landing on or entering a structure, rather than by a wall of flame arriving. That is why vents, eaves and the first few feet around the building carry so much weight relative to their cost.
Making mitigation count
An insurer cannot credit work it has no evidence of, and this is where households lose the benefit of work they actually did.
Document everything
- Dated photographs before and after each measure
- Contractor invoices describing what was installed, not just "landscaping"
- Roofing material certification and installation date
- Any inspection or certification your state or local programme provides
- Community programme participation records
- A single summary sheet listing every measure with dates
Then send it. Do not wait for renewal, and do not assume an underwriter will notice. Where a state requires insurers to recognise specified measures, the mechanism generally still requires you to submit evidence.
What to check on the policy itself
Fire is a covered peril under standard homeowners policies, including wildfire. What changes in high-exposure areas is availability and price rather than whether fire is covered — but two coverages deserve specific attention.
| Coverage | Why it matters after a wildfire |
|---|---|
| Dwelling limit | Rebuild costs rise sharply after a widespread event. A limit set years ago may not rebuild the house |
| Extended replacement cost | Pays above the limit by a stated percentage, which is exactly the gap that opens after a disaster |
| Ordinance or law | Rebuilding to current codes frequently costs more than the original construction standard |
| Loss of use | Rebuild timelines stretch after widespread damage; a time-limited coverage can expire mid-build |
| Debris removal | Substantial after a total loss, and subject to its own limit |
Moratoriums after a declared event
Several states have adopted rules restricting non-renewal for a period after a declared wildfire emergency in affected areas. They are time-limited, geographically defined, and published.
If you receive a non-renewal shortly after a declared event, ask your Department of Insurance whether a moratorium applies to your address before accepting the notice as final.
What we are not saying
We are not telling you what mitigation to undertake, and we cannot promise it will keep your coverage. Insurers make their own decisions and mitigation does not guarantee an outcome.
What we are saying is that address-level risk scores are driving these decisions, that roughly half the inputs are things you can change, that several states now require insurers to recognise specific measures, and that documentation is what turns work you did into credit you receive.
What happens as insurers withdraw
The sequence in affected areas has been consistent enough to describe, and knowing it tells you where you are in the process.
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Stage 1
Premium increases
Broad and territory-wide, driven by reinsurance costs and catastrophe experience rather than by anything about your household.
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Stage 2
Restricted new business
The insurer stops writing new policies in the area while continuing to renew existing ones. Invisible unless you are shopping.
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Stage 3
Selective non-renewal
Properties with the highest scores receive notices first. This is where mitigation and documentation earn their value.
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Stage 4
Broader withdrawal
The insurer reduces or exits the market. At this point the decision has nothing to do with individual properties.
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Stage 5
FAIR plan growth
Households move to the state's market of last resort, which is narrower and more expensive.
If you receive a non-renewal
In this order
- Diary the effective date — everything works backwards from it
- Check whether a post-disaster moratorium applies to your address
- Ask in writing what specifically would change the decision
- Contact an independent agent, who tracks current appetite by carrier and territory
- Submit your mitigation documentation to every insurer you approach
- Ask about your state's FAIR plan and price a companion policy alongside it
- Never let coverage lapse while deciding
That third point is worth pressing. Some wildfire non-renewals are conditional in practice even when the notice reads as final — clearing defensible space or replacing a roof can reopen the conversation. Asking costs nothing and the answer is specific.
Community-level measures
Individual mitigation matters, and so does what surrounds you. An isolated hardened structure among unmanaged fuel is still exposed, and several risk models account for the neighbourhood as well as the property.
What communities do that insurers sometimes recognise
- Recognised community wildfire preparedness certification
- Coordinated fuel reduction across adjoining properties
- Improved road access and secondary egress routes
- Shared water supply or hydrant improvements
- Local ordinances requiring defensible space maintenance
If your area holds a recognised certification, say so when you apply for coverage and provide the documentation. Some insurers credit it and none will apply it without being told.
What we are not saying, restated plainly
Mitigation reduces risk and can affect eligibility and price. It does not guarantee that any particular insurer will write or renew your policy, and it does not make a property fireproof.
What it does is move the inputs you control in the right direction, and give you something concrete to present when the conversation about renewal happens.
One question worth asking your insurer
Ask which specific mitigation measures they recognise and what documentation they require for each. The answer is a checklist, and it converts a vague sense that you should "clear brush" into a defined set of actions with a defined benefit.
Ask the same question of any insurer you approach after a non-renewal. Carriers weigh these measures differently, and the one that declined you is not necessarily representative of the market.
And ask whether they will re-rate mid-term if you complete work rather than making you wait for renewal. Some will. Where the alternative is a non-renewal taking effect in sixty days, that timing question can decide whether the mitigation helps you at all this year.
Keep a copy of every answer. When you shop the market next year, that file is the difference between saying you have mitigated and being able to show it.
This is general education, not advice. Insurance law and claim rules vary by state and change over time. Nothing here is legal, financial, or insurance advice for your situation, and reading it does not create any professional relationship. For your specific case, consult a licensed professional in your state or contact your state Department of Insurance.