Mobile Home Insurance in Washington: Park Lots, Titles, Flood and Earthquake Rules
Washington has 179,290 mobile homes, about 5.2% of all housing in the state, according to the Census Bureau's 2025 American Community Survey. Roughly 80% of occupied units in the Census mobile home category are lived in by their owners. If you are one of them, there's a good chance the house carries a vehicle-style title from the Department of Licensing instead of a deed, and if it sits in a park, you own the home but rent the ground under it.
Both of those facts change how insurance works. A manufactured home can be insured on its own policy form (the OIC calls it a mobile homeowner policy), the settlement terms vary more than on a site-built house, and the people with a stake in the home (you, the park, a lender holding the title) each sit in a different place in the paperwork. This article walks through each piece using Washington law and federal flood rules, and ends with what to look for on your declarations page.
Source: U.S. Census Bureau, ACS 2025 1-year, table DP04 (Washington); ACS 2025 DP04 (United States); U.S. Census Bureau, ACS 2025 1-year, table B25127 (Washington). The owner-occupied and year-built figures use the Census category "mobile home, boat, RV, van, etc."
A mobile homeowner policy is its own form
The Washington Office of the Insurance Commissioner (OIC) describes it in one line in its homeowner insurance guide: a mobile homeowner policy is "a package insurance policy written specifically for mobile homes. It includes coverage on the mobile home and the contents. It also includes theft and liability protection."
So the building blocks look familiar if you have read about a standard Washington homeowners policy: dwelling, contents, liability, sometimes loss of use. What changes is the fine print. On the common site-built form (the HO-3), the dwelling is covered against any risk of direct physical loss that isn't excluded, and it settles at replacement cost as long as you carry at least 80% of the cost to rebuild. A manufactured home form can be written either way. Wisconsin's insurance regulator puts it plainly: a manufactured homeowners policy "can be either a named peril or a comprehensive policy." Named peril means only the listed causes are covered. Comprehensive means everything not excluded is covered.
Here is how the features compare. The right-hand column is deliberately a list of questions, because the answer depends on the specific form your insurer filed.
| Feature | Typical HO-3 (site-built house) | Mobile home policy: what to check |
|---|---|---|
| Perils on the dwelling | Open perils: any direct physical loss not excluded | Named perils or open perils? The form name and the "perils insured against" section tell you |
| Dwelling settlement | Replacement cost if insured to at least 80% of rebuild cost | Actual cash value, replacement cost, or a stated amount? Look for the loss settlement wording |
| Other structures | Up to 10% of the dwelling limit | Are the carport, deck, shed, skirting and tip-outs covered, and for how much? |
| Liability | OIC: most policies carry at least $100,000 | Same question: what limit is listed? |
| Moving the home | Not applicable | Is there a consent-to-move or trip/transportation option? |
| Flood and earthquake | Excluded; bought separately | Also usually excluded; check the exclusions page |
Source: ISO HO-3 sample form (via Triple-I); OIC homeowner insurance guide; Wisconsin OCI, Manufactured Home Insurance (PI-066); Oregon DFR, manufactured home insurance. General description only; your policy wording controls.
Actual cash value vs. replacement cost on a manufactured home
This is the single biggest money question on a mobile home policy. Replacement cost pays what it costs to repair or replace at today's prices. Actual cash value (ACV) pays that amount minus depreciation. The OIC explains both on its how home insurance works page, and we have a longer walkthrough in replacement cost vs. actual cash value.
Other state regulators are blunt about how common ACV is on manufactured homes. Oregon's Division of Financial Regulation answers the question "Can an insurance company offer only actual cash value policies?" with one word: "Yes." Wisconsin's regulator says that in its market "most manufactured home policies are written on an actual cash value basis" and "a few insurance companies" write replacement cost. I couldn't find a published Washington figure, so I won't guess at one. The number that matters is the one on your own declarations page.
Oregon also explains why older homes end up on ACV: some older manufactured homes lose value as they age, and "your insurance is not supposed to pay out more than the home is actually worth."
Washington adds one rule that helps on ACV claims. Under WAC 284-20-010(4), an insurer can't depreciate the labor portion of a repair when it calculates actual cash value. Only the materials depreciate.
Why 1976 matters, and what the data plate says
Washington law draws the line on a date. Under RCW 59.20.030, a "mobile home" is a factory-built dwelling built before June 15, 1976, to standards other than the federal HUD code. A "manufactured home" is built to the HUD code, which the statute calls "a national preemptive building code." Federal rules (24 CFR 3282.8) apply HUD enforcement to homes that entered production on or after that same June 15, 1976 date.
Insurers care because the older homes were not built to one national standard. Oregon's regulator says homes made before 1976 "have building and safety conditions that are unregulated, thus posing potential additional risk to insurers." Oregon lists this as one reason it is "sometimes difficult to get insurance coverage for an older mobile home."
How many Washington homes fall on the old side? The Census doesn't split its year-built buckets at 1976, but it gets close. Among owner-occupied units in the "mobile home, boat, RV, van" category, 38,593 (28%) were built before 1980, and another 51% were built between 1980 and 1999.
Source: U.S. Census Bureau, ACS 2025 1-year, table B25127 (Washington)
Show the numbers
| Homes | |
|---|---|
| 1939 or earlier | 459 |
| 1940-59 | 783 |
| 1960-79 | 37,351 |
| 1980-99 | 68,600 |
| 2000-19 | 25,169 |
| 2020+ | 3,357 |
Every HUD-code home also has a data plate posted inside. Under 24 CFR 3280.305(c)(4) it lists the wind zone and roof (snow) load zone the home was designed for. Washington counties are not on HUD's lists for the higher wind zones, so homes here are typically Wind Zone I (designed for at least 15 pounds per square foot of horizontal wind load). Washington is also not on the North or Middle roof load lists, which puts it in HUD's South Roof Load Zone at 20 pounds per square foot. HUD's rule notes that mountain areas can have very different snow loads and lets HUD set stricter standards there. If your home sits in snow country, the data plate is worth a photo for your records, and the roof load number is worth knowing before a heavy winter.
Installation matters too. After July 1, 1995, RCW 43.22A.120 requires, with limited exceptions, a certified manufactured home installer on site whenever a manufactured or mobile home is installed in Washington, following the manufacturer's installation instructions. Wisconsin's regulator notes that an insurer may require approved tie-downs and ground anchors unless the home is on a permanent foundation, and that "without tie-downs, insurance coverage may not be provided." Keep your installation paperwork; it documents how the home is secured if an insurer ever asks.
Own the home, rent the lot: what RCW 59.20 says
Washington's Manufactured/Mobile Home Landlord-Tenant Act (chapter 59.20 RCW) governs the relationship between you and the community owner. I read the whole chapter looking for an insurance requirement. There isn't one: the statute does not require tenants to carry homeowners or liability insurance, and it does not make the park responsible for insuring your home.
That doesn't mean your park can't ask. A rental agreement can contain rules, and if yours includes an insurance requirement, it's treated like any other park rule. Under RCW 59.20.045 a rule is enforceable only if it serves residents' health, safety or welfare (or protects the premises), is reasonably related to that purpose, applies to all tenants fairly, and isn't retaliatory. New rules need 30 days' written notice plus a three-month grace period.
The provisions that touch insurance most directly:
| RCW section | What it says | Why it matters for insurance |
|---|---|---|
| 59.20.060(1)(e) | Written rental agreement must list anyone with a secured interest in your home | The same lender or legal owner should appear on your policy |
| 59.20.070(2), 59.20.130(8) | Landlord can't restrict your freedom of choice in buying goods or services | You choose your own agent and insurer |
| 59.20.130(2)-(3) | Landlord maintains common premises, prevents stagnant water and moving-water damage not caused by you, keeps common areas safe from fire and accident hazards | Damage from park-maintained areas may be a park issue, not only a claim on your policy |
| 59.20.130(6) | Landlord maintains utilities up to the hook-up point | Utility lines on the home side of the hook-up are yours |
| 59.20.135 | Park can't shift upkeep of park-provided carports, sheds and clubhouses to tenants; structures you built are yours | Insure the carport, deck or shed you added |
| 59.20.080(1)(e) | Closing or converting a park takes two years' notice (with listed exceptions) | A closure isn't physical damage, so a property policy doesn't pay to move you |
Source: Chapter 59.20 RCW (full text); ISO HO-3 sample form for the "direct physical loss" coverage trigger.
One practical point on liability. The park insures the park. If someone trips on your steps or your dog bites a neighbor, the claim is usually made against you, and the liability section of your own policy is what responds. Whether the park shares responsibility for an injury in a common area depends on the facts, which is a question for the insurers involved and, if it comes to that, an attorney.
Titles, lenders and who gets named on the policy
Washington treats a manufactured home as personal property with a title, much like a vehicle, unless the owner takes a specific step. Under RCW 65.20.030, for homes sold or transferred on or after March 1, 1990, a manufactured home is "not real property in any form, including fixture law, unless the title is eliminated." If you own the land under the home (or hold a lease of 35 years or more), you can apply through the Department of Licensing to eliminate the title, using DOL's Manufactured Home Application. Once the county records it, the home is treated as real property and DOL cancels the title.
| Titled home (e.g., on a rented lot) | Title eliminated (home on owned land) | |
|---|---|---|
| Legal status | Personal property; ownership under ch. 46.12 RCW | Real property, recorded with the county |
| How a loan is secured | Lien on the DOL title | Mortgage, deed of trust, lease or real estate contract on the land and home together |
| Who can do it | Default for homes on rented lots | Owner of the land (or a lease of 35+ years); lienholders must consent |
| Insurance paperwork | Lienholder or legal owner listed on the policy | Mortgagee listed on the policy, like a site-built house |
Source: Chapter 65.20 RCW (sections .020, .030, .040, .050, .060); WA Department of Licensing, Manufactured Home Application. The "insurance paperwork" row is general practice; check your loan documents.
Whichever way the home is held, the lender's name on your policy should match the title or the loan. If coverage lapses, expect the lender to step in. Oregon's regulator describes force-placed insurance as coverage your lender buys when you don't show proof of insurance: it "will cover only the amount due to the lender," usually leaves out your belongings and liability, is "usually extremely expensive," and gets rolled into your loan payment. Keeping your own policy current is almost always the better deal.
Flood: when NFIP treats a manufactured home as a building
A mobile home policy doesn't cover flood any more than a homeowners policy does. The National Flood Insurance Program does, with a few conditions specific to manufactured homes. The Standard Flood Insurance Policy counts a manufactured home as a building if it is built on a permanent chassis, transported in one or more sections, and affixed to a permanent foundation. In a special flood hazard area, the home also has to be anchored at the time of loss, by over-the-top or frame ties to ground anchors, per the manufacturer's specifications or the community's floodplain rules.
- Limits: up to $250,000 on the building and $100,000 on contents (FloodSmart).
- Waiting period: coverage generally starts 30 days after purchase, with exceptions such as a policy required for a loan.
- Total losses: for a manufactured home at least 16 feet wide and 600 square feet that is your principal residence, the policy pays the least of replacement cost, 1.5 times actual cash value, or the building limit.
- Lenders: federal law (42 U.S.C. 4012a) bars regulated lenders from making or renewing a loan secured by a mobile home in a special flood hazard area unless flood insurance is in place.
- Siting: federal floodplain rules (44 CFR 60.3(c)(6)) require participating communities to make manufactured homes placed outside a park, in a new park or expansion, or in a park where a home suffered substantial flood damage in mapped high-risk zones be elevated at or above base flood elevation and anchored.
Our Washington flood insurance guide covers the rest, and Maru's Washington flood insurance page explains how separate flood coverage is arranged.
Earthquake and wildfire
Earthquake. The OIC lists earthquakes among the "excluded risks" on a home policy (how home insurance works), and says earthquake deductibles usually run 10% to 25% of the building limit (OIC earthquake insurance page). Oregon's regulator says the same of manufactured home policies: they "rarely cover" flood or earthquake, and earthquake coverage comes as a separate policy or an endorsement.
Manufactured homes have a particular weak spot. A Washington Emergency Management Division flyer warns that many older mobile homes "rest on slender supports that overturn in earthquakes," and tells owners to check their support systems every few years and watch for deteriorating wood blocks. It lists four large Washington quakes: magnitude 6.8 in 1949, 6.5 in 1965, 5.8 in 1999 and 6.8 in 2001. State installation rules (WAC 296-150I-0340) let local governments in earthquake-hazard areas require an earthquake-resistant bracing system designed by the manufacturer or a licensed engineer or architect. More on the coverage side in our Washington earthquake insurance post.
Wildfire. Fire is the one big peril a standard policy does carry. The OIC says all standard homeowners and property policies in Washington include fire coverage on terms at least as good as the state's model fire policy (OIC wildfire page). Location still matters. Several counties where mobile homes make up a large share of housing, including Okanogan, Stevens and Ferry, were among the seven counties in the governor's August 2026 wildfire emergency proclamation. See Washington wildfire insurance for how fire claims and nonrenewals work.
Source: U.S. Census Bureau, ACS 2020-2024 5-year, table DP04 (Washington counties)
Show the numbers
| County | Mobile homes |
|---|---|
| Pierce | 16,815 |
| Snohomish | 15,145 |
| King | 14,084 |
| Spokane | 11,657 |
| Yakima | 10,433 |
| Thurston | 10,174 |
| Grant | 9,446 |
| Clark | 7,466 |
| Benton | 7,073 |
| Kitsap | 6,801 |
Source: U.S. Census Bureau, ACS 2020-2024 5-year, table DP04 (Washington counties)
Show the numbers
| County | Share of housing units |
|---|---|
| Grant | 23.5% |
| Adams | 23.4% |
| Ferry | 21.0% |
| Stevens | 18.4% |
| Okanogan | 17.6% |
| Klickitat | 17.5% |
| Garfield | 16.8% |
| Pacific | 16.5% |
| Mason | 16.4% |
| Pend Oreille | 16.2% |
The two lists tell different stories. Pierce, Snohomish and King have the most mobile homes partly because they have the most housing overall. In Grant and Adams counties, nearly one home in four is a mobile home. Statewide the share is 5.2%.
What to check on your declarations page
Pull out the declarations page and the policy form, and go down this list. Anything you can't find is a question for your agent or insurer.
- Form name. Is it a mobile home or manufactured home form, and is the dwelling covered for named perils or open perils?
- Loss settlement. Does the dwelling settle at actual cash value or replacement cost? What about contents?
- Dwelling limit. Would it buy a comparable home today, including delivery, setup and tie-downs?
- Add-ons. Wisconsin's regulator advises confirming that "adjacent sheds, tipout rooms, skirting, and additional rooms are covered." In a park, anything you built is yours to insure (RCW 59.20.135).
- Liability limit. The OIC says most homeowner policies carry at least $100,000. Decide whether that's enough for you.
- Deductibles. All-peril deductible, plus any separate earthquake or wind deductible.
- Names. Named insured matches the owner on the DOL title; lienholder or legal owner matches the loan.
- Location. Street address and lot or space number are correct.
- Moving. If you might relocate the home, ask about consent-to-move or trip coverage before the move, not after.
- Exclusions. Flood and earthquake are almost certainly excluded; decide whether you need separate coverage.
If you'd like a second set of eyes on any of this, Maru's Washington home insurance page and Washington insurance FAQ are a good starting point.
Renewals, nonrenewals and complaints
Mobile and manufactured homeowners get the same renewal protections as other Washington homeowners. The premium transparency rule (chapter 284-30A WAC) expressly covers "mobile homeowners, manufactured homeowners." Starting November 1, 2026, renewal notices, renewal emails and renewal bills must carry a "Did my premium go up?" notice telling you that you can ask, in writing (email counts), why your premium increased, and the company must explain the specific reasons. Once it gets your written request, the insurer has 20 calendar days to respond.
If your insurer decides not to renew, RCW 48.18.2901 requires at least 60 days' written notice with the actual reason.
If you think an insurer handled a claim, a renewal or a cancellation unfairly, the OIC's consumer advocates take complaints online or at 800-562-6900, 8:30 a.m. to 4:30 p.m., Monday through Friday (file or check a complaint). Once the insurer receives your complaint, it has 15 business days to respond (OIC complaint process). Our step-by-step guide to filing a complaint with the Washington Insurance Commissioner covers what to have ready.
Your own policy wording and Washington law control how any claim is handled. Confirm your situation with a licensed agent or the Office of the Insurance Commissioner, and talk to an attorney about legal questions such as park rules or title elimination.
Sources
- Chapter 59.20 RCW, Manufactured/Mobile Home Landlord-Tenant Act
- Chapter 65.20 RCW, Manufactured Home Real Property Act (title elimination)
- Chapter 43.22A RCW, manufactured home installation
- WAC 296-150I-0340, installation in hazardous areas
- WAC 284-20-010, fire insurance policies (no labor depreciation)
- Chapter 284-30A WAC, premium change transparency
- RCW 48.18.2901, nonrenewal notice
- WA Department of Licensing: Manufactured Home Application
- OIC: Homeowner insurance guide (PDF)
- OIC: Learn how home insurance works
- OIC: Earthquake insurance
- OIC: Wildfires and insurance
- OIC: File a complaint or check your complaint status
- OIC: Understanding the complaint process
- Washington Emergency Management Division: mobile homes and earthquakes flyer (PDF)
- Office of the Governor: wildfire emergency proclamation (Aug. 2026)
- 24 CFR 3280.305, HUD wind and roof load zones, data plate
- 24 CFR 3282.8, HUD code applicability (June 15, 1976)
- NFIP Standard Flood Insurance Policy, Dwelling Form (44 CFR Part 61, App. A(1))
- 44 CFR 60.3, floodplain management criteria
- FloodSmart: buy a flood policy (limits, waiting period)
- 42 U.S.C. 4012a, mandatory flood insurance purchase
- ISO HO-3 sample homeowners form (Triple-I)
- Oregon Division of Financial Regulation: manufactured home insurance
- Wisconsin Office of the Commissioner of Insurance: Manufactured Home Insurance (PI-066)
- U.S. Census Bureau, ACS 2025 1-year, DP04: Washington
- U.S. Census Bureau, ACS 2025 1-year, DP04: United States
- U.S. Census Bureau, ACS 2020-2024 5-year, DP04: Washington counties
- U.S. Census Bureau, ACS 2025 1-year, B25127: Washington
This article is for general educational purposes only and is not legal, tax or insurance advice. Coverage depends on the actual policy, its terms, conditions and exclusions, and state law. Maru Insurance · WA License (WAOIC) #1365574 · FL License #G363233 · NPN 22261820.