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Home Insurance Coverage Gaps: What's Not Covered

Standard HO-3 does NOT cover: flood (separate policy required), sewer backup ($5–20K avg claim; endorsement $40–$100/yr), earthquake, service lines on property ($40–75/yr endorsement). ACV vs RCV: 12yr roof on ACV pays 50% of claim; RCV pays 100%. Check declarations page. High-value items: jewelry sublimited at $1,000–1,500; schedule separately. Total gap coverage cost: $300–$700/yr in endorsements; one claim pays for 10–20 years. Own Luxury Homes® 12-Point Agent Integrity Audit™ — 5 insurance questions at every closing.

Home Insurance: What It Covers, What It Doesn't, and the 6 Coverage Gaps Most Homeowners Don't Know About

HO-3

The standard homeowners policy almost everyone has; covers named or open perils depending on the section

Not flood

Standard HO-3 does NOT cover flood damage from any external water source — requires a separate flood policy

$5–20K

Average sewer backup claim; excluded from standard policies; endorsement costs only $40–$100/yr

ACV vs RCV

Actual cash value vs replacement cost value: the difference can be tens of thousands on a major claim

Most homeowners have a policy they've never read and an assumption that they're covered for anything bad that happens. They're not. A standard HO-3 policy is carefully worded to cover specific perils and specifically exclude others. The exclusions are where most costly surprises happen. This guide covers what standard homeowners insurance actually covers, the six most significant gaps, and the endorsements that close them — most for less than $200/year.

THE OWN LUXURY HOMES® DIFFERENCE

No insurance to sell. This guide tells you what your policy likely doesn't cover — call your insurer and ask about each gap.

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What a Standard HO-3 Policy Covers

Coverage Section	What It Covers	Common Limits
Dwelling (Coverage A)	Structure of your home from covered perils: fire, wind, hail, lightning, vandalism, explosion, theft	Replacement cost of home; must be adequate to rebuild
Other structures (Coverage B)	Detached garage, fence, shed from same covered perils	Typically 10% of Coverage A
Personal property (Coverage C)	Belongings inside the home from covered perils	Typically 50–70% of Coverage A; jewelry and electronics often sublimited
Loss of use (Coverage D)	Additional living expenses if home is uninhabitable due to covered loss	Typically 20–30% of Coverage A; covers hotel, food above normal
Personal liability (Coverage E)	Legal liability if someone is injured on your property	Typically $100,000–$300,000; consider umbrella policy
Medical payments (Coverage F)	Medical expenses for guests injured on property regardless of fault	Typically $1,000–5,000; not for you or family members

The 6 Coverage Gaps That Cost Homeowners the Most

Gap 1: Flood Damage (The Most Costly)

Standard HO-3 policies exclude ALL forms of external flood: rising rivers, storm surge, flash floods, and heavy rain-induced flooding. If water enters your home from outside (ground up, not from a burst pipe), your standard policy does not cover it. Flood insurance is a separate policy — NFIP (National Flood Insurance Program) or private flood insurance. Even if you're not in a high-risk flood zone: 26% of all flood claims come from low-to-moderate risk zones (FEMA). Private flood insurance is increasingly more comprehensive than NFIP and often competitively priced.

Gap 2: Sewer Backup (The Surprise $5,000–20,000 Claim)

Raw sewage backing up into your basement through your drains or toilets is excluded from standard HO-3 coverage. Standard policies cover sudden internal pipe bursts — not backup through the sewer system. The fix: a water/sewer backup endorsement, typically $40–$100/year for $5,000–25,000 in coverage. One of the highest-value endorsements available. Separate from flood insurance and from service line coverage.

Gap 3: Earthquake Damage

Standard HO-3 policies exclude earthquake damage. Required in California and Pacific Northwest, but also relevant in the New Madrid Seismic Zone (Tennessee, Arkansas, Missouri, Illinois). Earthquake insurance is a separate policy or endorsement. Significant deductibles (often 10–15% of dwelling coverage) apply.

Gap 4: Actual Cash Value vs Replacement Cost Value

Two ways insurers can pay a claim: Actual Cash Value (ACV) = replacement cost MINUS depreciation. Replacement Cost Value (RCV) = what it costs to replace with new items today. Example: a 10-year-old roof destroyed by hail. ACV: insurer pays replacement cost minus 10 years of depreciation — perhaps 40–60% of replacement. RCV: insurer pays the full replacement cost. Check your policy declarations: if it says ACV on your roof or personal property, upgrade to RCV. The premium difference is small; the claim difference can be $10,000–25,000 on a major loss.

Gap 5: Service Lines (The Hidden Utility Infrastructure)

The water, sewer, electric, gas, and cable lines running from the street to your home — the portion on your property — are your responsibility, not the utility company's. Standard HO-3 does not cover service line failure. Repair costs: water line break ($3,000–10,000+), sewer line failure ($4,000–15,000+). Service line endorsement: $40–$75/year. Separate from and complementary to sewer backup coverage.

Gap 6: Jewelry, Art, and High-Value Items (Sublimits)

Standard HO-3 typically sublimits jewelry at $1,000–1,500 and silverware at $2,500. A $15,000 engagement ring stolen in a burglary: your standard policy pays $1,500. A $50,000 painting: subject to sublimits that may cover a fraction. High-value items require scheduled personal property coverage (a "rider" or "floater") that specifically insures each item at its appraised value.

Endorsements That Close the Gaps: What They Cost

Endorsement	What It Adds	Typical Annual Cost
Water/sewer backup	Sewer backup; drain backup; sump overflow	$40–$100/yr
Service line protection	Water, sewer, electric, gas lines on your property	$40–$75/yr
Replacement cost on roof (upgrade from ACV)	Full replacement cost on roof regardless of age	$50–$150/yr
Scheduled personal property (jewelry, art)	Specific items at appraised value; no sublimit	$100–$300+/yr depending on value
Equipment breakdown	Mechanical failure of appliances and systems (not covered under standard)	$25–60/yr
Ordinance or law	Code upgrade costs required when rebuilding (standard policy doesn't cover the gap)	$25–75/yr
Umbrella policy (separate)	Liability above homeowner's policy limits ($1M–5M)	$150–$350/yr
Total cost to close all major gaps: approximately $300–$700/year in additional premiums. Compare to the alternative: one uninsured sewer backup claim = $5,000–20,000 out of pocket.

“The insurance conversation I have with every buyer: "Call your agent the week after closing and go through five specific questions: Do I have flood coverage? Do I have sewer backup coverage? Is my roof on replacement cost or actual cash value? Are my valuables scheduled? Do I have service line coverage? If any of those answers is no, get a quote on the endorsement. You're probably looking at $300–$600 a year to close every major gap. One uncovered sewer backup pays for that coverage for 10–20 years."”

— Ryan Brown, Principal Broker & CEO, Own Luxury Homes®

What does homeowners insurance not cover?

Standard HO-3 does NOT cover: (1) Flood from external sources (requires separate flood policy). (2) Sewer backup (add water/sewer backup endorsement for $40–$100/yr). (3) Earthquake (separate policy or endorsement). (4) Service lines on your property (add endorsement for $40–$75/yr). (5) Full replacement cost of aging roof (check ACV vs RCV on declarations page). (6) High-value items above sublimits (schedule separately).

Does homeowners insurance cover sewer backup?

No — standard HO-3 policies exclude sewer backup. Average sewer backup claim: $5,000–20,000. The fix: add a water/sewer backup endorsement to your policy ($40–$100/year). This covers damage from water or sewage backing up through drains, sewers, or sump pumps. It does not cover flood damage; that requires a separate flood policy.

What is the difference between ACV and replacement cost?

Actual Cash Value (ACV): replacement cost minus depreciation. A 12-year-old roof with a 25-year lifespan may be valued at 50% of replacement. Replacement Cost Value (RCV): full cost to replace with new, similar quality today. On a $20,000 roof claim: ACV might pay $10,000; RCV pays $20,000. Check your declarations page; upgrade to RCV on roof and personal property if on ACV.

Do I need flood insurance if I'm not in a flood zone?

Strongly consider it. 26% of all NFIP flood claims come from properties outside high-risk flood zones (FEMA). Heavy rainfall, overwhelmed storm systems, and drainage failures cause flooding in areas that have never flooded before. Private flood insurance is increasingly competitive and often more comprehensive than NFIP. Annual premium for low-risk zone: $300–$800 typically.

Related Guides

Own Luxury Homes® — 5 questions to ask your insurer the week after closing. 12-Point Agent Integrity Audit™. Talk to a specialist ›

"The introduction Own Luxury Homes® makes is to a specialist with documented closing history in your specific market — not the county, not the metro, the submarket you're actually selling or buying in. That's the standard we verify before your name goes anywhere."

— Ryan Brown, Principal Broker & CEO, Own Luxury Homes® (FL License BK3626873)