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Home Insurance Information: HO-3 Coverages, Endorsements, and Claims

A plain-English reference for every home insurance term, coverage type, claim scenario, and endorsement that affects your premium.

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Updated May 21, 2026 · Methodology

SC
Written by
Sarah Chen
Editorial Director
MA
Edited by
Marcus Allen
Senior Editor
PW
Reviewed by
Dr. Patricia Wong
Insurance Industry Analyst
DP
Data review
David Park
VP of Data Science
Why you can trust this guide: Coverage definitions follow Insurance Services Office (ISO) HO-3 standard policy forms. Reviewed quarterly against NAIC consumer guidance and Insurance Information Institute best practices.

Nearly every owner-occupied home in the U.S. is insured on an HO-3 form. It’s an “open peril” policy for the dwelling (everything is covered except what’s specifically excluded) and a “named peril” policy for personal property (only listed perils are covered). This guide walks through what HO-3 actually covers, the standard exclusions, the endorsements worth adding, and how deductibles work.

Quick facts
  • HO-3 is open-peril for dwelling, named-peril for personal property.
  • Flood and earthquake are NOT covered by standard HO-3. Separate policies required.
  • Many CAT-prone states use percentage deductibles (1–5% of dwelling) for wind/hail.

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What HO-3 covers

  • Coverage A — Dwelling: structure of your home, attached garage, built-in appliances.
  • Coverage B — Other structures: detached garage, shed, fence, pool, driveway.
  • Coverage C — Personal property: your belongings (10 named perils).
  • Coverage D — Loss of use: hotel, food, incremental living costs while displaced.
  • Coverage E — Personal liability: bodily injury + property damage you cause to others.
  • Coverage F — Medical payments: small medical bills for guest injuries (no fault required).

Standard HO-3 exclusions to know about

  • Flood — separate policy (NFIP or private). Always required for FEMA-designated SFHA zones.
  • Earthquake — separate endorsement or standalone. Critical in CA, OR, WA, AK, parts of UT/NV/MO/SC.
  • Maintenance / wear and tear — ongoing neglect isn’t covered.
  • Sewer / drain backup — available as an endorsement; rarely standard.
  • Pest damage — termites, rodents, etc.
  • Intentional acts — damage you cause on purpose.
  • Government action — ordinance + law expansion required separately.

Deductibles: flat vs. percentage

Most home policies have a flat dollar deductible — $1,000, $2,500, $5,000. In CAT-prone areas you’ll also see percentage deductibles for specific perils:

  • Wind/hail deductible — common in TX, OK, KS, NE; usually 1–5% of dwelling.
  • Hurricane deductible — FL, LA, TX coast, NC, SC, GA; usually 2–10% of dwelling.
  • Wildfire deductible — emerging in CA; 1–10% of dwelling.
  • Named-storm deductible — separate trigger for named tropical storms.

On a $500K home, a 5% hurricane deductible is $25,000 out of pocket before the carrier pays a dollar. Worth knowing before a storm season.

Endorsements: what to add and what they cost
  • Endorsement
    Water / sewer backup
    What it covers
    Sump pump failure, drain backup
    Typical cost / yr
    $50–$150
  • Endorsement
    Scheduled personal property
    What it covers
    Jewelry, art, firearms above sub-limit
    Typical cost / yr
    $30–$100/item
  • Endorsement
    Equipment breakdown
    What it covers
    HVAC, water heater, electrical panel
    Typical cost / yr
    $30–$70
  • Endorsement
    Service line
    What it covers
    Underground water/sewer line failure
    Typical cost / yr
    $25–$50
  • Endorsement
    Identity theft
    What it covers
    ID restoration costs
    Typical cost / yr
    $25–$50
  • Endorsement
    Earthquake (CA/OR/WA)
    What it covers
    Earthquake damage
    Typical cost / yr
    $300–$1,200
  • Endorsement
    Flood (NFIP or private)
    What it covers
    Flood damage
    Typical cost / yr
    $400–$2,500
PW
Expert Tip
Dr. Patricia Wong
Insurance Industry Analyst
Water-backup endorsement is the most under-bought line on standard policies. A finished basement + a sump-pump failure during a storm = $15–$40K in damage that your HO-3 doesn’t cover. $100/yr for the endorsement is among the highest-ROI insurance you can buy.

What to do at claim time

  1. Immediate — stop further damage (tarp the roof, shut off the water main).
  2. Day 1 — file claim via app or 1-800; get claim number.
  3. Days 2–5 — adjuster visits, scope of loss documented, emergency mitigation paid.
  4. Weeks 1–4 — contractor estimates, repair authorization, ALE (loss-of-use) reimbursement.
  5. Months 1–6+ — repairs/rebuild, final payout once work complete (replacement-cost holdback).

Claims process — five steps

  1. 1
    Stop damage

    Tarp, shut water, document the scene.

  2. 2
    File

    Within 24 hours via app/1-800. Get claim number.

  3. 3
    Adjuster

    Inspects, scopes loss, pays mitigation.

  4. 4
    Contractor

    Estimates approved, repairs begin.

  5. 5
    Resolution

    Final payment + RC holdback once work complete.

HO-3 vs. HO-5 (upgraded)

Pros
  • HO-5 is open-peril for personal property too — broader protection.
  • HO-5 typically includes replacement cost on personal property by default.
  • Better for homes with significant high-value contents.
  • Cleaner claim experience — fewer "is this peril named?" disputes.
Cons
  • HO-5 costs 10–20% more than HO-3.
  • Not all carriers write HO-5.
  • Overkill for typical home with no high-value scheduled items.
  • HO-3 + open-peril endorsements often replicates HO-5 at lower total cost.

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Frequently asked questions

How much home insurance do I need?
Dwelling = replacement cost (not market value). Personal property = 70% of dwelling. Liability = $300K min, $500K with pool/dog/assets. See our sizing guide.
What's the difference between HO-3 and HO-5?
HO-3 is open-peril for dwelling, named-peril for personal property. HO-5 is open-peril for both. HO-5 costs 10–20% more.
Is mold covered?
Usually only if it stems from a covered water loss (e.g., pipe burst). Ongoing mold from humidity, leaks, or maintenance issues isn’t covered.
Are roof leaks covered?
Sudden, accidental damage from a covered peril (e.g., wind, hail, fallen tree) yes. Gradual leaks from worn shingles or poor maintenance no.
Does my home insurance cover items in my car?
Sort of — off-premises coverage extends to your belongings while in your vehicle, typically at 10% of personal-property limit. Theft from car requires police report.
What's a claim-free discount?
5+ years without filing a claim at any carrier earns a discount, typically 5–15%. Re-verify at every renewal — carriers sometimes lose track.

Methodology

Coverage definitions follow ISO HO-3 standard policy forms (current edition). Endorsement availability and pricing verified against major-carrier policy forms. Claims-process guidance based on NAIC model regulations.

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