3.4 Mobile Home and Specialized Dwelling Coverage

The Mobile Home Endorsement

A mobilehome (manufactured home) cannot be insured on an unmodified Homeowners form because of its construction and mobility. ISO addresses this with the Mobilehome Endorsement (MH 04 01) attached to an HO-2 or HO-3 policy. The endorsement converts the form to cover a mobilehome and adds the features the dwelling needs:

• The home must be at least 10 feet wide and 40 feet long (the ISO size threshold the exam cites).
• Coverage A is written at the home's actual cash value or stated value; replacement cost is harder to obtain because manufactured homes depreciate like vehicles.
• The endorsement adds a small Property Removal / emergency-relocation allowance — commonly $500 — to move the home out of the path of a peril such as flood or windstorm.

Mobilehome Coverage Limits and Structure

The MH endorsement re-letters several coverages relative to a standard HO:

Worked example. A mobilehome insured for $60,000 Coverage A. Other Structures at 10% = $6,000; Personal Property at a 40% default = $24,000. Trap: unlike a sticks-and-bricks HO-3, the mobilehome is settled at ACV, so a 12-year-old unit with a $60,000 stated value may pay far less than $60,000 on a total loss — the insured should request a stated-value or RC endorsement if available.

Other Specialized Dwelling Forms

Several programs sit alongside the standard dwelling forms for risks the DP/HO cannot reach:

• HO-4 (Contents Broad / Renters): for a tenant — contents on a broad named-peril basis plus liability; no building coverage. The natural complement to a landlord's DP.
• HO-6 (Unit-Owners / Condo): insures the condominium unit-owner's personal property, improvements/betterments, and liability; the association's master policy covers the building shell. Includes a base Coverage A of $5,000 for interior alterations, raisable by endorsement.
• Builder's Risk / Dwelling Under Construction: insures a structure during construction — premium reflects the average rising value, and the policy ends when the home is completed and occupied.
• FAIR Plans: state-mandated insurers of last resort for high-risk or uninsurable dwellings (urban/coastal/brush) that the voluntary market declines; typically written on DP-1-equivalent named-peril terms.

Builder's Risk and Reporting the Rising Value

A Dwelling Under Construction / Builder's Risk form solves a timing problem: the structure's value climbs from a slab to a finished home over months. Rather than re-rate weekly, the policy is written on the completed value and charges premium based on the average amount at risk over the construction period.

Key rules: coverage attaches at the start of construction and terminates when the dwelling is completed and occupied (or after a set number of days). Materials and supplies on site, at the builder's premises, or in transit are included up to a sublimit. Trap: once the owner moves in, builder's risk ends — the home must be rolled to a permanent DP or HO form or it goes uninsured.

Matching Specialized Forms to the Risk

Use this quick reference to place the right specialized product:

Trap: an HO-6 unit-owner's base Coverage A is only $5,000 for interior alterations and improvements; a unit-owner who renovated a kitchen must schedule up Coverage A by endorsement or be badly underinsured for those betterments.

Flood, Earthquake, and the National Flood Insurance Program

Because every dwelling and homeowners form excludes flood, the National Flood Insurance Program (NFIP), administered by FEMA, fills the gap. The exam tests its core numbers:

• Residential building limit: up to $250,000; contents up to $100,000 under the Dwelling Form.
• A standard 30-day waiting period applies before a new flood policy takes effect (with limited exceptions), so a buyer cannot wait until a hurricane is approaching.
• Flood means a general and temporary condition of partial or complete inundation of normally dry land — typically requiring two or more acres or two or more properties to be affected.

Earthquake is likewise excluded and bought back by the Earthquake Endorsement, which uses a percentage deductible (e.g., 5–15% of the Coverage A limit) rather than a flat-dollar deductible. Trap: earthquake percentage deductibles are far larger in dollar terms than they look — on a $300,000 dwelling, a 10% deductible is $30,000 before the policy pays anything.

Transportation/Permission to Move and Disappearing Deductible

Mobilehome forms add features tied to the unit's mobility. The transportation/permission-to-move provision extends coverage (often 30 days) while the home is being relocated within the policy territory for the insured's safety, typically against collision, upset, and stranding. Many mobilehome programs also use a disappearing (vanishing) deductible on the unit, where the deductible reduces as the loss grows and disappears once the loss reaches a stated amount — a contrast to the flat deductible on standard dwelling forms.