3.4 Mobile Home and Specialized Dwelling Coverage
Key Takeaways
- Mobile homes are insured by endorsing a Dwelling/MH form; settlement is often ACV due to rapid depreciation, with optional trip/transportation coverage for moves.
- Vandalism & malicious mischief and glass breakage are suspended once a dwelling is vacant beyond 60 consecutive days — critical for seasonal/rental risks.
- Dwelling Under Construction writes the Coverage A limit at completed value but charges premium on a provisional/average basis; material theft is restricted until the structure is secure.
- Flood and earthquake are always excluded from DP forms — flood goes through the NFIP (30-day wait, $250k/$100k caps) and earthquake usually carries a percentage deductible.
Mobile Home and Specialized Dwelling Coverage
The base Dwelling forms can be adapted to non-traditional residential risks through endorsements and companion programs. This section covers the Mobile Home endorsement, seasonal/secondary dwellings, builder's risk, and the way the Dwelling program interfaces with the NFIP for flood.
Mobile Home Coverage
A mobile or manufactured home is insured by attaching the Mobile Home endorsement (DP 01 ... / MH 04 ...) to a Dwelling policy (or via a Mobilehome Homeowners form, MH). Key features:
- Coverage A insures the mobile home itself; Coverage B typically provides a small additional amount (commonly 10% of A) for other structures.
- A common automatic add-on is up to $500 (or as scheduled) for property removal to protect the unit from an impending covered peril.
- Transportation/Trip Coverage can be endorsed to insure the home against collision, upset, and stranding while being moved — ordinary in-transit perils are otherwise excluded.
- Valuation is frequently ACV because mobile homes depreciate quickly; replacement cost is available by endorsement on newer units.
Trap: a mobile home's rapid depreciation makes the ACV settlement the default expectation on the exam — do not assume replacement cost the way you would on a DP-3 site-built home.
Seasonal and secondary dwellings
A seasonal dwelling (occupied only part of the year) is eligible for the Dwelling program but the Vacancy/Unoccupancy provisions matter: certain perils — notably vandalism & malicious mischief and glass breakage — are suspended once the dwelling has been vacant beyond 60 consecutive days, and other losses may be reduced by a stated percentage. A secondary residence can often be added to the insured's primary Homeowners policy as a scheduled location instead of a separate DP.
Builder's risk (Dwelling Under Construction)
The Dwelling Under Construction endorsement adapts a DP form for a home being built. The Coverage A limit is written at the completed value, but premium is charged on an average-value (provisional) basis reflecting the increasing exposure as construction progresses. Theft of building materials is typically excluded until the structure is secured/lockable and occupancy begins.
Specialized perils: flood and earthquake
Flood and earth movement are excluded from all Dwelling forms. They are covered separately:
| Peril | Solution | Notes |
|---|---|---|
| Flood | NFIP / Write-Your-Own policy | Standard 30-day waiting period; building and contents written separately; dwelling cap commonly $250,000 building / $100,000 contents |
| Earthquake | Difference-in-Conditions or EQ endorsement | Often a percentage deductible (e.g., 10–15% of the limit), not a flat dollar amount |
Worked example (flood): a structure with a $200,000 NFIP building limit suffers $60,000 of flood damage and the policy carries a 2% deductible of the limit. Deductible = 2% × $200,000 = $4,000, so the NFIP pays $56,000 (within the $250,000 cap).
Quick comparison
- Site-built DP-3 → open-peril building, replacement cost, 80% coinsurance.
- Mobile home → endorsement to DP, often ACV, trip coverage optional.
- Under construction → completed-value limit, provisional premium, theft restricted until secure.
- Flood/quake → always a separate program; never assume it is in the DP form.
NFIP mechanics worth memorizing
The National Flood Insurance Program is administered by FEMA and sold either directly or through Write-Your-Own (WYO) carriers who issue NFIP policies under their own name. Core facts that show up repeatedly:
- 30-day waiting period before coverage takes effect (exceptions: loan-closing requirements and certain map changes).
- Standard dwelling limits: $250,000 building / $100,000 contents.
- Building and contents are separate coverages — buying one does not include the other.
- Flood is defined as a general and temporary condition of partial or complete inundation of normally dry land, including from two or more acres or two or more properties.
- Coverage is ACV for contents and typically replacement cost for the primary-residence building if insured to at least 80% of replacement cost or the maximum limit.
Earthquake coverage and percentage deductibles
Earth movement — earthquake, landslide, sinkhole, mudflow — is excluded from the DP forms and added by an Earthquake endorsement or written through a Difference-in-Conditions (DIC) policy. The hallmark is a percentage deductible (commonly 10–15% of the coverage limit), which can dwarf a flat-dollar property deductible. Worked example: $300,000 dwelling limit, 10% EQ deductible, $80,000 quake loss. Deductible = 10% × $300,000 = $30,000, so the policy pays $50,000 — the insured absorbs the first $30,000. A single earthquake event (typically a 72-hour window of related shocks) counts as one occurrence for the deductible.
Putting the specialized risks together
When a question describes a non-standard residential risk, work through three questions: (1) Is the structure eligible for a standard DP, or does it need an endorsement (mobile home, under construction)? (2) What valuation applies — ACV is the safe default for mobile homes and contents, RC for site-built DP-2/DP-3 buildings? (3) Is the peril even in the property form — flood and earthquake are always carved out to a separate program. Getting these three reflexes right resolves the large majority of specialized-dwelling exam items.
Mobile Home Endorsement Details
Mobile/manufactured homes are insured by adding the Mobile Home endorsement to a homeowners HO-2 or HO-3 form, adapting it for transportable dwellings. Two features are tested. First, settlement is frequently on an ACV basis (mobile homes depreciate quickly), though replacement cost can be endorsed. Second, the transportation/permission-to-move coverage extends limited protection (commonly up to $500 or a stated amount) for collision, upset, or stranding while the unit is being moved for safety — but only with the insurer's consent and typically for 30-60 days.
Watercraft and Specialty Dwelling Notes
The exam pairs mobile homes with other niche dwelling exposures. Standard homeowners watercraft liability is narrow (small horsepower limits), so larger boats need a separate boatowners/yacht policy. Seasonal and dwelling-under-construction risks use a builders-risk or a dwelling form with a theft of building materials consideration. Remember that vacant or unoccupied dwellings beyond 60 days can trigger reduced vandalism/glass coverage, a frequent distractor on specialty-dwelling questions.
An NFIP flood policy on a dwelling has a $250,000 building limit and a 2% deductible. A covered flood causes $90,000 of building damage. How much does the NFIP pay?
A seasonal dwelling has stood vacant for 75 consecutive days when it suffers vandalism damage. How does a Dwelling policy typically respond?