3.1 Dwelling & Homeowners Policy Structures

Key Takeaways

  • Homeowners policy forms range from HO-2 Broad (named perils for dwelling and contents) to HO-5 Comprehensive (open perils for dwelling and contents), with HO-3 Special offering open perils on dwelling and named perils on contents.
  • Standard Homeowners policies contain four principal Section I Property Coverages: Coverage A (Dwelling), Coverage B (Other Structures at 10% of A), Coverage C (Personal Property at 50% of A), and Coverage D (Loss of Use at 30% of A).
  • HO-4 is designed specifically for tenants/renters (Coverage C & D only), while HO-6 covers condominium unit owners with specialized Coverage A for building additions and alterations.
  • The anti-concurrent causation clause excludes loss caused directly or indirectly by an excluded peril (such as flood or earth movement), even if a covered peril contributed concurrently or sequentially to the loss.
  • Ordinance or Law endorsements are critical for covering the additional costs of rebuilding to modern Connecticut building codes following a major covered loss.
Last updated: July 2026

3.1 Dwelling & Homeowners Policy Structures

Residential property insurance provides financial protection against physical damage to residential structures and personal property, as well as loss of use resulting from covered perils. For claims adjusters, mastering the specific coverage forms, policy structures, peril triggers, and valuation methods defined in ISO (Insurance Services Office) standard Dwelling and Homeowners policies is essential for determining coverage eligibility and loss settlement amounts.


Overview of Residential Policy Lines

Residential property coverage is divided into two primary policy families:

  1. Dwelling Policies (DP Forms): Designed primarily for non-owner-occupied residential property (such as tenant-occupied rental properties or vacant dwellings), seasonal residences, or risks ineligible for Homeowners policies.
  2. Homeowners Policies (HO Forms): Multi-peril package policies designed for owner-occupied single-family homes, condominiums, or tenant residential risks. Homeowners policies combine both Section I (Property Coverages) and Section II (Liability Coverages) into a single integrated policy contract.

Homeowners Policy Forms (HO-2 through HO-8)

The ISO standard Homeowners insurance program establishes standard policy forms tailored to different occupancies and structural ownership types. The claims adjuster must analyze the form type to identify whether the loss was caused by a covered peril.

Policy FormNameStructure Coverage (A & B) PerilsPersonal Property (C) PerilsTypical Valuation Standard
HO-2Broad FormNamed Perils (Broad Form)Named Perils (Broad Form)Replacement Cost (Dwelling) / ACV (Contents)
HO-3Special FormOpen Perils ("Risk of Direct Loss")Named Perils (Broad Form)Replacement Cost (Dwelling) / ACV (Contents)
HO-4Contents Broad Form (Renters)N/A (No Coverage A or B)Named Perils (Broad Form)Actual Cash Value (ACV)
HO-5Comprehensive FormOpen PerilsOpen PerilsReplacement Cost (Dwelling & Contents)
HO-6Unit-Owners Form (Condo)Named Perils (Special by Endorsement)Named Perils (Broad Form)Replacement Cost (Building Items) / ACV (Contents)
HO-8Modified Coverage FormNamed Perils (Basic Form)Named Perils (Basic Form)Functional Replacement Cost

Key Structural Differences Between Forms

  • HO-2 Broad Form: Covers both building structures and personal property against 16 specifically named broad perils. If a loss is caused by an unlisted peril, no coverage exists.
  • HO-3 Special Form: Provides Open Perils (historically called "all-risk") coverage for Coverage A (Dwelling) and Coverage B (Other Structures), but Named Perils coverage for Coverage C (Personal Property). Under open perils, any direct physical loss is covered unless specifically excluded in the policy contract. The burden of proof rests on the insurer to demonstrate that an exclusion applies.
  • HO-4 Contents Broad Form: Designed for tenants renting a house, apartment, or room. It provides no Coverage A (Dwelling) or Coverage B (Other Structures) because the tenant does not own the building structure. It focuses entirely on Coverage C (Personal Property) and Coverage D (Loss of Use).
  • HO-5 Comprehensive Form: Represents the highest tier of residential property protection. Unlike HO-3, HO-5 extends Open Perils coverage to both the building structures AND personal property, covering accidental loss or damage to personal items unless expressly excluded.
  • HO-6 Unit-Owners Form: Designed specifically for owners of condominium units or cooperative apartments. Coverage A (Dwelling) is customized to cover building items owned by the insured under the condominium association bylaws, including interior alterations, appliances, fixtures, and interior non-bearing walls. Personal property (Coverage C) is covered on a named perils basis.
  • HO-8 Modified Coverage Form: Tailored for older or historic homes where the market value is substantially lower than the cost to rebuild with original materials. It limits coverage to basic named perils and settles losses on a Functional Replacement Cost basis (using modern, lower-cost building materials).

Section I Property Coverages Architecture

Standard Homeowners policies contain four principal Section I Property Coverages, designated as Coverages A, B, C, and D. Limits for Coverages B, C, and D are established as automatic percentages of the Coverage A limit, though they can be increased by endorsement.

+-----------------------------------------------------------------------------+
|                        SECTION I PROPERTY COVERAGES                         |
+-----------------------------------------------------------------------------+
| Coverage A: Dwelling                    | Primary Policy Limit ($100%)       |
| Coverage B: Other Structures            | Automatic 10% of Coverage A        |
| Coverage C: Personal Property           | Automatic 50% of Coverage A        |
| Coverage D: Loss of Use                 | Automatic 30% of Coverage A        |
+-----------------------------------------------------------------------------+

Coverage A – Dwelling

  • Covers the primary residential dwelling structure shown on the Declarations Page, including structures attached directly to the dwelling (such as an attached garage, deck, or porch).
  • Covers building materials and supplies located on or next to the residence premises used to construct, alter, or repair the dwelling or other structures.
  • Excludes: The land on which the dwelling is located, including land value or land restoration costs.

Coverage B – Other Structures

  • Covers structures on the residence premises set apart from the dwelling by clear space (such as a detached garage, storage shed, gazebo, retaining wall, or fence).
  • Standard default limit is 10% of Coverage A.
  • Excludes: Land, structures rented or held for rental to any person who is not a tenant of the dwelling (unless used solely as a private garage), or structures used in whole or in part for any business purpose.

Coverage C – Personal Property

  • Covers personal property owned or used by an insured anywhere in the world (worldwide coverage).
  • Standard default limit for an owner-occupied home is 50% of Coverage A (for HO-4, Coverage C is selected by the insured as the primary limit).
  • Special Limits of Liability: Standard policies contain specific internal money and property category caps to limit insurer exposure to theft and loss of high-value items:
    • $200 on money, bank notes, bullion, coins, and medals.
    • $1,500 on securities, deeds, evidence of debt, passports, tickets, and stamps.
    • $1,500 on watercraft, including their trailers, furnishings, and equipment.
    • $1,500 on trailers or semi-trailers not used with watercraft.
    • $1,500 for loss by theft of jewelry, watches, furs, and precious/semi-precious stones.
    • $2,500 for loss by theft of firearms and related equipment.
    • $2,500 for loss by theft of silverware, goldware, pewterware, and tea sets.
    • $2,500 on property on the residence premises used primarily for business purposes.

Coverage D – Loss of Use

  • Combines two essential indirect loss coverages: Additional Living Expense (ALE) and Fair Rental Value.
  • Standard default limit is 30% of Coverage A (for HO-3).
  • Additional Living Expense (ALE): Pays any necessary increase in living expenses incurred by the insured so that the household can maintain its normal standard of living when a covered loss makes the residence premises uninhabitable.
  • Fair Rental Value: Indemnifies the owner for the net lost rental income (less non-continuing expenses) if a portion of the premises rented to others is rendered uninhabitable by a covered peril.
  • Civil Authority Prohibits Use: Pays ALE and Fair Rental Value for up to two weeks if a civil authority prohibits the insured from occupying the residence premises as a direct result of damage to neighboring premises caused by a covered peril.

Peril Mechanics: Open Perils vs. Named Perils

When evaluating a property claim, the adjuster must first establish the burden of proof based on the peril type:

  1. Named Perils (Broad Form): The insured bears the burden of proving that the direct physical loss was caused by one of the specifically enumerated perils in the policy contract:

    • Fire or Lightning
    • Windstorm or Hail
    • Explosion
    • Riot or Civil Commotion
    • Aircraft & Vehicles
    • Smoke
    • Vandalism or Malicious Mischief
    • Theft
    • Volcanic Eruption
    • Falling Objects
    • Weight of Ice, Snow, or Sleet
    • Accidental Discharge or Overflow of Water or Steam from plumbing/HVAC
    • Sudden and Accidental Tearing Apart, Cracking, Burning, or Bulging of heating/AC systems
    • Freezing of plumbing, heating, or air conditioning systems
    • Sudden and Accidental Damage from Artificially Generated Electrical Current
  2. Open Perils (Special Form): Covers all risks of direct physical loss to covered property except those specifically excluded. The burden of proof rests entirely on the insurer to demonstrate that the cause of loss is excluded under Section I Exclusions.


Concurrent Causation & Exclusions

One of the most critical legal doctrines in property insurance adjusting is the Doctrine of Concurrent Causation and the policy's Anti-Concurrent Causation Clause.

Anti-Concurrent Causation (ACC) Clause

Under standard ISO Section I Exclusions, the policy states that loss caused directly or indirectly by any of the following excluded perils is excluded regardless of any other cause or event contributing concurrently or in any sequence to the loss:

  • Earth Movement: Earthquake, landslide, mudflow, earth sinking, or subsidence.
  • Water Damage: Flood, surface water, waves, tidal water, storm surge, overflow of a body of water, or water under the ground surface pressing on or flowing through foundation walls.
  • Ordinance or Law: Enforcement of any building ordinance or law regulating the construction, repair, or demolition of a building (unless endorsed).
  • Power Failure: Off-premises failure of power or utility services.
  • Neglect / War / Nuclear Hazard / Intentional Loss / Government Action.

Example: If a severe coastal hurricane brings both high winds (a covered peril) and storm surge flooding (an excluded peril) that destroy a oceanfront residence simultaneously, the Anti-Concurrent Causation clause operates to exclude the damage caused by storm surge, requiring the adjuster to carefully segregate direct wind damage from flood damage.


Ordinance or Law Coverage

When a covered peril causes severe structural damage, local building enforcement officials (such as municipal building inspectors in Connecticut) may enforce modern building codes requiring structural upgrades, fire suppression systems, or elevated foundations during reconstruction.

  • Standard Homeowners policies provide a limited additional coverage for Ordinance or Law equal to 10% of Coverage A.
  • Insureds can purchase higher limits (e.g., 25% or 50%) via the Ordinance or Law Coverage Endorsement (HO 04 77).
  • This endorsement pays for the increased costs incurred to repair, rebuild, or demolish a covered building to comply with current state or local codes.

Worked Math Example: Homeowners Section I Settlement

Scenario

An insured owns a single-family dwelling covered under an HO-3 Special Form policy with the following limits:

  • Coverage A (Dwelling): $400,000
  • Deductible: $1,000

A major kitchen fire causes extensive damage to the dwelling and personal property, and forces the family into temporary housing.

Step 1: Establish Coverage Limits

  • Coverage A Limit = $400,000
  • Coverage B Limit (10% of A) = $40,000
  • Coverage C Limit (50% of A) = $200,000
  • Coverage D Limit (30% of A) = $120,000

Step 2: Evaluate Claimed Losses & Sub-limits

  1. Dwelling Structural Repair Cost: $180,000 (Fully covered under Coverage A).
  2. Detached Storage Shed Damage: $6,000 (Fully covered under Coverage B limit of $40,000).
  3. Personal Property Loss (Coverage C):
    • General furniture and clothing: $35,000 (Covered).
    • Stolen/Destroyed Cash in desk: $3,000. Policy Sub-limit for Cash = $200.
    • Stolen/Destroyed Jewelry: $4,500. Note: Fire loss to jewelry is NOT subject to the $1,500 theft sub-limit! Fire is a broad named peril. (Fully covered $4,500).
    • Total Personal Property Claimed = $35,000 + $200 (capped cash) + $4,500 = $39,700 (Well within $200,000 limit).
  4. Additional Living Expenses (Coverage D): 3 months temporary apartment rental and restaurant meal increase = $12,000 (Fully covered within $120,000 limit).

Step 3: Calculate Final Payout

  • Gross Covered Loss = $180,000 (Dwelling) + $6,000 (Shed) + $39,700 (Contents) + $12,000 (ALE) = $237,700.
  • Net Insurer Payout = $237,700 - $1,000 Deductible = $236,700.
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Homeowners Policy Section I Structure & Peril Application
Test Your Knowledge

An insured holding an unendorsed HO-3 Special Form policy suffers a severe fire loss that destroys personal property inside the home. Under Coverage C, how is personal property covered against fire?

A
B
C
D
Test Your Knowledge

A homeowner has an HO-3 policy with a $500,000 Coverage A limit. A severe storm causes a tree branch to fall, destroying a detached storage shed on the premises. What is the maximum standard policy limit available for the shed under Coverage B?

A
B
C
D
Test Your Knowledge

During a torrential hurricane, coastal ocean storm surge floods a basement while high-velocity wind tears off roof shingles. The policy contains standard ISO anti-concurrent causation language. How must the claims adjuster handle the loss?

A
B
C
D