Coverage B - Other Structures

A Forensic Breakdown of the 10% Rule, Valuation Doctrine, and How Detached Structures Are Assessed After a Loss

Coverage B — Other Structures is the section of a standard HO‑3 homeowners policy that protects structures on the residence premises that are not physically attached to the dwelling. These include:

Detached Garage Metal Shop Storage Shed Unattached Carports Workshops Fences and Retaining Walls Pool Houses and Similar Improvements

Most carriers automatically set the Coverage B limit at 10% of Coverage A (Dwelling). This percentage is fixed unless the homeowner increases it through an endorsement.

Man to Man Explanation:

Coverage B is the part of your policy that pays for the stuff not connected to your house. If you can walk between it and your home, it’s Coverage B.

Here’s the part most Oklahomans don’t realize: The 10% limit wasn’t designed for metal shops, acreage fencing, or $80,000 garages. It was designed decades ago when “other structures” meant a tiny wooden shed.

If your detached structures are worth more than that 10% number, you’re carrying the difference on your own back.

Simple Explanation:

Coverage B is like having a second money bucket that helps fix buildings in your yard that aren’t attached to your house.

If a storm breaks your fence or smashes your shed, this bucket helps pay for it — but only up to the amount inside the bucket.

If the bucket is too small, you have to pay the rest yourself.

The Oklahoma 10% Rule —

Why It Fails So Many Homeowners

Most HO‑3 policies default Coverage B to 10% of Coverage A. In Oklahoma, this often creates a major gap because detached structures here are bigger, more expensive, and more exposed to wind and hail.

Illustration (Educational Only)

If Coverage A = $300,000 → Standard Coverage B = $30,000 If a windstorm damages:

  • A detached garage

  • Fencing

  • A shed

…and the combined replacement cost is $60,000, the remaining $30,000 becomes your out‑of‑pocket exposure.

This is the most common Coverage B failure point in Oklahoma.

Fencing — The Most Common Coverage B Claim in Oklahoma

Fencing is the single most frequent Coverage B loss in the state.

Exposure Factors

  • Linear‑foot cost

  • Material type (wood, metal, pipe, privacy)

  • Wind exposure

  • Age and condition

  • ACV vs RCV eligibility

Typical Oklahoma Replacement Ranges (Educational Only)

  • Standard wood privacy fence: $22–$34 per linear foot

  • Pipe fencing: $18–$28 per linear foot

  • Metal panel fencing: $28–$42 per linear foot

Why Fencing Fails Coverage B Most acreage properties exceed the 10% limit with fencing alone. Most fencing defaults to ACV unless endorsed.

Acreage Properties — The Largest Coverage B Exposure in Oklahoma

Acreage properties often include multiple detached structures and long perimeter fencing.

Common Detached Structures on Acreage

  • Metal shops (40×60, 50×80, 60×100)

  • Barns

  • Equipment sheds

  • Pipe fencing

  • Detached garages

  • Well houses

Exposure Drivers

  • Large square footage

  • High wind exposure

  • Multiple structures damaged in the same storm

  • Long fencing runs

  • ACV defaults on older buildings

Why Acreage Properties Exceed the 10% Rule The combined replacement cost of fencing + shop + shed often exceeds the standard limit by tens of thousands of dollars.

“The most frequent underinsurance scenario in Oklahoma involves Coverage B. The 10% standard limit is a relic of when properties only had small sheds. Homeowners often evaluate the replacement cost of each detached structure to understand whether the policy limit aligns with the property’s actual exposure.” — Micah Belyeu, Oklahoma Licensed Insurance Producer

When Coverage A and Coverage B Interact in a Total Loss

In a catastrophic loss, Coverage B does not stack on top of Coverage A. If Coverage A is exhausted, Coverage B may effectively collapse into the Coverage A limit.

Illustration (Educational Only)

  • Coverage A: $300,000

  • Coverage B: $30,000

  • Total loss to home + detached garage

If the home requires the full $300,000 to rebuild, the detached garage may receive no additional payout unless the policy includes extended dwelling coverage or specific endorsements.

Evaluating Large Detached Structures

Many Oklahoma properties include large metal shops (commonly 40×60 or larger), which can have higher rebuild costs. Evaluating the replacement cost of each detached structure helps determine whether the standard 10% limit aligns with the property’s exposure.

Illustration: Standard 10% Coverage B Limit vs. Estimated Replacement Cost (May 2026 Estimates)
Dwelling Limit (Coverage A) Standard Coverage B Limit (10%) Estimated Replacement Cost Exposure Gap
$350,000 Home $35,000 Detached Garage + Fence: $65,000 $30,000 Exposure
$500,000 Home (Acreage) $50,000 40'×60' Metal Shop: $156,000 $106,000 Exposure

Disclaimer: These numbers are illustrative only and not bids or guaranteed rebuild costs. Replacement costs are derived from national May 2026 high-end construction estimates for illustration purposes only.

Coverage B Exposure Assessment Tool (Educational Only)

This tool demonstrates the difference between your Coverage B limit and the estimated replacement cost of your detached structures.

Disclaimer: This tool is for educational purposes only and does not represent bids, guaranteed rebuild costs, or insurance advice.

Request a Policy Review

“Running the numbers shows you the limit. Understanding valuation shows you the payout. Coverage B exposure is the first half of the story — the second half is how the policy actually calculates what it will pay on the day you need it.” — Micah Belyeu

Valuation Doctrine — How Your Claim Is Actually Calculated

The final payout for a damaged detached structure depends on the valuation rules written into your policy.

Replacement Cost Value (RCV)

  • Pays the full cost to rebuild

  • No depreciation applied

  • Still capped by the Coverage B limit

  • Full RCV is only paid after repairs are completed

Actual Cash Value (ACV)

  • Pays RCV minus depreciation

  • Older structures = larger depreciation hit

  • Many sheds, fences, and older shops default to ACV unless endorsed

Ordinance or Law (Code Upgrades)

Your base policy pays to rebuild the structure as it was, not as code requires today. Code upgrades may include:

  • Electrical updates

  • Wind‑resistant construction

  • Foundation changes

  • Fire separation requirements

Without Ordinance or Law coverage, these costs fall on the homeowner.

Coverage B Peril Behavior — How Detached Structures Respond to Oklahoma Storms

Detached structures in Oklahoma take the brunt of wind and hail exposure. Coverage B responds differently depending on the peril that caused the loss.

Wind Wind damage to fences, sheds, shops, and detached garages is covered unless excluded. Most fencing defaults to ACV unless endorsed.

Hail Hail damage to metal shops, roofs, and siding is covered. Cosmetic‑only exclusions may apply to metal surfaces.

Tornado Tornado losses are treated as wind events. Coverage B limits still apply even if multiple structures are damaged in the same storm.

Fire Fire losses are covered at RCV if the structure is eligible. Older sheds and shops often default to ACV.

Theft Coverage applies to the structure itself, not the contents stored inside unless Coverage C extends off‑premises.

Vandalism Covered unless the structure has been vacant for more than 60 days.

Weight of Ice or Snow Covered unless excluded or ineligible for RCV.

Coverage B Exclusions and Limitations

Detached structures are subject to specific exclusions that limit payout.

Category How It Affects Coverage B
Business Use Detached shops or garages used for business may be excluded or limited.
Rental Use Structures rented to others may require a landlord endorsement.
Land Land value is never covered. Coverage applies only to the structure itself.
Contents Items stored inside detached structures fall under Coverage C, not Coverage B.
Code Upgrades Not covered unless Ordinance or Law coverage is added.
Wear and Tear Deterioration, aging, and maintenance‑related issues are not covered.
Mechanical Breakdown Failures of mechanical systems or equipment are not covered.
Vermin / Rodents Damage caused by animals, insects, or infestation is excluded.
Earth Movement Earthquake, settling, shifting, or soil movement is excluded unless endorsed.
Flood Flood damage is excluded and requires a separate flood policy.

How Coverage B Is Calculated on Claim Day

The payout for a damaged detached structure follows a strict sequence.

Step 1 — Determine Valuation Method
RCV or ACV based on policy language and structure eligibility.
↓
Step 2 — Apply Depreciation (ACV Only)
Older sheds, fences, and shops often take a large depreciation hit.
↓
Step 3 — Apply Deductible
Wind/hail deductibles apply to most Oklahoma losses.
↓
Step 4 — Apply Coverage B Limit
The limit caps the payout even if the structure costs more to rebuild.
↓
Step 5 — Apply Ordinance or Law (If Present)
Covers code upgrades such as electrical, wind‑resistant construction, or foundation changes.
↓
Step 6 — Apply Sublimits
Fencing, business use, and rental use may have additional caps.

Need Help Understanding Your Policy?

If you want help reviewing your home insurance coverage or understanding how your deductible, roof coverage, or exclusions work, you can request a policy review. This is an informational service and does not obligate you to make any changes.

Request a Policy Review

Coverage B — Frequently Asked Questions

Is my metal shop covered under Coverage B?
Yes. A metal shop is covered when it is fully detached and used for personal purposes. Business or rental use can remove it from Coverage B eligibility unless specifically endorsed.
Does Coverage B pay for the contents inside my shop?
No. Coverage B only insures the structure itself. Tools, equipment, and stored items fall under Coverage C and may have off‑premises limits.
Is fencing covered?
Yes. Fencing is a covered detached structure, but most carriers settle it at ACV unless an RCV endorsement is added. Age and condition heavily influence the payout.
Does hail damage to my metal shop count as cosmetic?
It depends on the carrier. Some policies exclude cosmetic dents to metal surfaces unless the damage penetrates, fractures, or compromises the structure’s function.
Can I increase Coverage B?
Yes. Most carriers allow higher Coverage B limits through endorsement. This is essential for properties with large shops, barns, or extensive fencing.
Does Coverage B have its own deductible?
No. The wind/hail deductible applies to the entire claim, including detached structures. Coverage B does not have a separate deductible.
Are barns covered?
Yes, if the barn is detached and used for personal purposes. Any business, agricultural, or rental use may require a separate endorsement or policy.
Does Coverage B cover concrete pads?
Yes. Concrete pads are considered part of the detached structure and are included in the replacement cost unless excluded by policy language.
Are well houses covered?
Yes. A detached well house is a covered structure as long as it is part of the residence premises and not used for business or rental activity.
Does Coverage B cover retaining walls?
Yes, unless the policy includes specific retaining‑wall limitations. Some carriers apply sublimits or exclude walls used for land stabilization.
Are code upgrades included?
Only if Ordinance or Law coverage is added. Without it, the policy pays to rebuild the structure as it was, not as current code requires.
Does Coverage B cover storm shelters?
Yes. Detached storm shelters are covered structures unless specifically excluded. Coverage applies to the structure, not the contents inside.
Are solar panels on a detached structure covered?
Yes. Solar panels attached to a detached structure fall under Coverage B, but valuation, depreciation, and cosmetic exclusions may affect the payout.
Micah Belyeu
Written by Micah Belyeu
Licensed Property & Casualty Insurance Producer
Owner, Storms Anchor Insurance
Micah Belyeu is a licensed Property & Casualty insurance producer and the owner of Storms Anchor Insurance. He focuses on contract‑based coverage education, helping homeowners understand how policy structure, deductibles, exclusions, and claim conditions work in real‑world situations. If you want help understanding how your current policy is structured, you can request a contract review here.
National Producer Number (NPN): 18800568
State License Numbers (Property & Casualty):
• Oklahoma: OK #300324530
• Colorado: CO #874526
• Missouri: MO #3003438851
• Texas: TX #3274329

Disclaimer: This page is for educational purposes only and does not determine legal liability, coverage outcomes, claim results, or carrier pricing. Insurance policies are governed solely by the written contract issued by the carrier. All coverage decisions, underwriting actions, premium calculations, and claim determinations are made exclusively by licensed insurance carriers using their own proprietary models and state‑approved guidelines. Policy terms, exclusions, deductibles, conditions, and interpretations vary by carrier, state, and individual risk profile. Nothing on this page modifies, replaces, or supersedes any insurance contract or legally binding document. For specific guidance, refer to your active policy or consult a licensed insurance professional.

© Storms Anchor Insurance. All rights reserved.
Privacy Policy | Terms of Use | Licensing & Disclosures