Most Florida property managers can describe what their landlord policy covers for the main dwelling. Far fewer can accurately describe how the same policy treats a detached garage, carport, storage shed, or workshop — and that gap costs owners real money after every major storm. Coverage B (Other Structures) is the section of your DP-3 policy that governs detached structures, and its default limits, exclusions, and deductible mechanics are substantially different from what most managers assume.
This guide explains exactly how Coverage B works for Florida rental properties: what the 10% cap means in practice, how the hurricane deductible applies to every outbuilding claim, the critical garage door issue that can undermine your wind mitigation premium credit, the business-use exclusion that can void coverage entirely, and the pre-storm documentation your owner clients need to protect Coverage B claims.
How Coverage B Works — and Why 10% Is Often Not Enough
Coverage B (Other Structures) provides insurance for structures on your rental property that are not attached to the main dwelling. This includes detached garages, carports, storage sheds, pool equipment rooms, workshops, gazebos, and fencing. The standard DP-3 policy sets Coverage B at 10% of Coverage A automatically.
On a $300,000 property, that is $30,000 for all detached structures combined — not per structure. If a hurricane damages a two-car detached garage, a tool shed, and a vinyl fence simultaneously, the $30,000 limit must cover all three repairs. In Florida's post-hurricane market, where contractor costs spike 40–70% above normal rates in the months after a major storm, $30,000 often falls short of replacing a single two-car detached garage.
The replacement cost of a detached two-car garage in South Florida in 2026 ranges from $28,000 to $55,000 depending on construction type, permits, and market conditions post-storm. A single-car carport runs $8,000 to $18,000 to replace. A wood privacy fence around a typical rental lot can cost $6,000 to $14,000 to replace after a Category 3 or 4 event strips it down. Property managers who have not assessed whether the default Coverage B limit covers the actual replacement cost of their owners' outbuildings should do that math now — before a storm makes it relevant.
Increasing Coverage B Is Straightforward
Most Florida carriers allow Coverage B to be increased by endorsement — typically up to 20% or 25% of Coverage A — for a modest premium increase. A property with $350,000 in Coverage A and a large detached garage valued at $45,000 may need Coverage B increased from the default $35,000 to $52,500 (15% of Coverage A). The additional annual premium is usually $50–$150, a trivial cost relative to the gap it closes. Property managers should flag Coverage B adequacy at every annual insurance review.
The Hurricane Deductible Applies to Coverage B Claims
One of the most common misconceptions property managers encounter is the assumption that the hurricane deductible applies only to the main dwelling. It does not. The hurricane deductible — typically expressed as 2%, 3%, or 5% of Coverage A — applies to the entire policy, including Coverage B claims for detached structures.
This has significant practical consequences. On a $350,000 property with a 3% hurricane deductible, the out-of-pocket deductible obligation is $10,500 for any named storm claim — regardless of whether the claim is primarily on the house or entirely on the detached garage. If a hurricane destroys only the detached garage (worth $28,000 in Coverage B) and leaves the main house undamaged, the owner still owes the full $10,500 hurricane deductible before Coverage B pays anything. The net insurance recovery on a $28,000 detached garage loss is $17,500 — a substantial gap that many owners do not anticipate.
On properties with percentage-based hurricane deductibles, isolated detached structure claims — a shed, a carport, a fence — are often not worth filing after a major storm. A $7,000 shed replacement on a property with a $10,500 hurricane deductible produces zero insurance recovery and generates a claims record that follows the property for seven years on the C.L.U.E. report. Property managers should calculate the hurricane deductible exposure before filing, and advise owners on whether the recovery justifies the claim history impact on a small Coverage B loss.
The Garage Door Problem: Attached vs. Detached Structures and Wind Mitigation
Florida's wind mitigation inspection program evaluates seven structural features of the primary dwelling to determine what premium credits an insurer will apply. One of the most valuable credits — opening protection — depends on whether all openings in the main structure are covered by rated hurricane protection. This is where garage doors become critical, and where property managers often make a costly mistake.
The Attached Garage Door Issue
An attached garage is part of the main dwelling structure. Its garage door is therefore an "opening" that the wind mitigation inspector evaluates. If an attached garage has a standard, non-hurricane-rated door, the inspector marks opening protection as "none" or "partial" on the OIR-B1-1802 form — typically eliminating a credit worth 10–35% of the wind premium. On a $4,000 annual wind premium, losing this credit costs $400–$1,400 per year, every year, until the door is replaced.
For properties with attached garages, a FHBC-rated garage door (costing $1,200–$2,500 installed for a standard two-car) pays for itself in reduced wind premiums within 1–3 years in most markets. This is one of the most cost-effective premium-reduction investments available to Florida rental property owners.
The Detached Garage Does Not Affect the House's Wind Mitigation Credit
An important clarification: a non-rated garage door on a detached garage does not affect the wind mitigation credit for the main house. The OIR-B1-1802 form evaluates only the primary structure. But the detached garage itself receives no wind mitigation credit consideration — it is simply covered (or not) by Coverage B at whatever its replacement cost is.
Property managers should be able to tell their owners clearly: replacing the door on the attached garage is a premium-reduction investment; replacing the door on the detached garage is purely a structural decision with no wind mitigation impact on the policy.
The Business-Use Exclusion: How a Tenant Can Void Coverage B
Standard DP-3 landlord policies include language excluding Coverage B structures that are "rented to others" or "used in whole or in part for business purposes." This exclusion is more commonly triggered than most property managers realize, and it can result in complete denial of an outbuilding claim.
Business-use scenarios that can trigger this exclusion at rental properties include: a tenant running auto repair from a detached garage; a tenant using the garage as warehouse or inventory storage for an online retail business; a contractor or handyman using the garage as a workshop and tool storage facility; any situation where the tenant is charging customers to access the garage space; or a tenant subletting the garage to a third party for storage.
The exclusion can also be triggered by language in the lease that separately identifies the garage as a "storage unit" and charges a separate monthly fee — which the insurer may characterize as renting the structure separately from the main dwelling. Property managers who charge separate fees for garage access should review this language with the insurer or broker before it generates a Coverage B denial.
Protecting Against the Business-Use Exclusion
The simplest protection is a lease clause explicitly prohibiting commercial use of any detached structure on the property. Annual interior photographs of the garage documenting its use as residential storage — not commercial inventory or business equipment — create a documented record that the exclusion was not triggered at the time of the loss. If an inspection reveals a tenant has converted the garage to a business use, the property manager should notify the insurer promptly; continued coverage without disclosure of the changed use creates a separate coverage problem.
ACV vs. Replacement Cost Coverage on Detached Structures
Coverage B follows the valuation method elected under Coverage A. On a replacement cost value (RCV) policy, detached structures are covered at their replacement cost — what it costs to build the same structure new, after applying the hurricane deductible. On an actual cash value (ACV) policy, Coverage B pays the replacement cost minus depreciation — which can be severe for older wood-frame garages or carports.
A 20-year-old wood-frame detached garage in Florida has accumulated substantial depreciation. On an ACV policy, the insurer might value it at 30–40% of its replacement cost — meaning a $30,000 replacement cost garage produces a $9,000–$12,000 ACV payout. Combined with the hurricane deductible, an ACV policy on a property with a 3% deductible ($10,500 on a $350,000 property) may produce zero recovery on an outbuilding that cost $30,000 to replace.
Property managers should flag ACV policies on properties with detached structures — particularly older wood-frame garages — and advise owners on whether upgrading to RCV coverage is warranted. The premium difference for RCV coverage on the full policy is typically 10–20% annually; on a $3,000 annual premium that is $300–$600 per year, often a reasonable investment to close the ACV depreciation gap on a substantial detached structure.
When Detached Structure Damage Is Not Worth Filing
Florida's C.L.U.E. (Comprehensive Loss Underwriting Exchange) report records every insurance claim — including Coverage B claims — for seven years. A filed claim follows the property address, not just the policy, and can affect premium calculations at renewal and carrier eligibility for the next insurer. Small Coverage B claims that produce minimal insurance recovery after the hurricane deductible is subtracted often cost more in long-term premium impact than they recover in the short term.
A general rule of thumb: if the Coverage B claim recovery (structure damage minus the hurricane deductible) is less than $5,000, filing the claim is often not financially justified when weighed against the seven-year premium impact and the potential for carrier non-renewal in Florida's current market. Property managers should present this calculation to owners before filing on small outbuilding losses — the decision to file or self-fund a modest repair is a meaningful financial choice in the current Florida insurance environment.
When a Detached Structure Requires a Permit After Storm Damage
Florida's building codes require permits for repairs above a dollar threshold — typically $2,500 in most Florida counties — and for any structural repair to a detached garage or carport. After a hurricane, a detached garage that is partially or fully destroyed must be rebuilt to current Florida Building Code standards under permit, even if the original structure predated those standards by decades. This is the "ordinance and law" problem applied to Coverage B: the cost to rebuild to current code can exceed the Coverage B limit, particularly on older structures.
Ordinance and law coverage (Coverage A endorsement) does not automatically extend to Coverage B structures. Some carriers offer a separate Coverage B ordinance and law endorsement; others apply it broadly. Property managers should verify this at renewal for any portfolio property with older detached structures in high-risk hurricane zones.
Track every structure, every claim, and every deadline across your Florida portfolio
LossHQ lets you document all structures — main dwelling, detached garages, carports, and outbuildings — with pre-storm photos, coverage amounts, and ACV/RCV notes. After a storm, file claims for each structure, track adjuster visits, monitor Coverage B recovery separately from Coverage A, and ensure one-year filing deadlines are never missed.
Start Free — No Card Required →What to Tell Owner Clients Before Hurricane Season
The Coverage B conversation is one that most property managers do not have with their owner clients because it seems like a detail. After a Category 3 or 4 hurricane, it frequently becomes one of the most contested line items in the claim. Property managers who have briefed their owners — confirmed the Coverage B limit adequacy, documented the outbuildings pre-storm, and advised on the business-use and ACV issues — have clients who understand what to expect and file better-supported claims. Property managers who have not had this conversation are managing the confusion after the storm.
The three questions every Florida property manager should answer for every owner with detached structures: (1) Is the Coverage B limit actually enough to replace every outbuilding if all are destroyed in one storm? (2) Is the policy ACV or RCV, and what does that mean for an older garage? (3) Has the tenant been screened for business use of the garage, and does the lease prohibit it explicitly? The answers to these three questions determine whether a Coverage B claim after the next major Florida hurricane is a routine recovery or an expensive dispute.