Park models are legally considered RVs under federal law when they stay at or under 400 square feet of gross trailer area and are certified to the ANSI A119.5 standard for park model recreational vehicles. Meet those conditions and the federal Department of Housing and Urban Development exempts the unit from manufactured home rules; miss them and the same unit can fall under manufactured home regulation instead. The classification sounds technical, but it shapes almost every practical question a buyer cares about: where the unit can sit, whether you can live in it year-round, how it’s taxed, and what kind of insurance actually pays out on a claim.
The Federal Rule That Makes a Park Model an RV
HUD draws the line between manufactured homes and recreational vehicles. Under its regulations, a recreational vehicle is exempt from manufactured home construction and safety standards if it meets three conditions: it is not certified as a manufactured home, it is designed only for recreational use and not as a primary residence, and it is built and certified to either NFPA 1192 for standard RVs or ANSI A119.5 for park model recreational vehicles.1eCFR. 24 CFR 3282.15 – Exemption for Recreational Vehicles Motorhomes and travel trailers follow NFPA 1192. Park models follow ANSI A119.5, a standard developed because neither permanent building codes nor standard RV codes fit them cleanly.2Federal Register. Manufactured Home Procedural and Enforcement Regulations – Clarifying the Exemption for Manufacture of Recreational Vehicles
Park models carry one requirement that standard RVs do not. Before the sale closes, the manufacturer must post a prominently displayed notice certifying the unit is a park model recreational vehicle designed only for recreational use, not for use as a primary residence or permanent occupancy. That notice has to sit in the kitchen in letters at least half an inch tall, and no one can remove it until the sale is finished.1eCFR. 24 CFR 3282.15 – Exemption for Recreational Vehicles It is not decoration. That notice is part of what keeps the unit classified as an RV under federal law.
Why 400 Square Feet Is the Number That Matters
The RV Industry Association defines a park model RV as a single living unit built primarily on a single chassis, mounted on wheels, designed for temporary living quarters for recreational, camping, or seasonal use, and certified to ANSI A119.5. Gross trailer area cannot exceed 400 square feet in setup mode.3RV Industry Association. Standards and Regulations The measurement runs against the setup configuration, not the transport configuration, and lofted areas with a ceiling height of five feet or more count toward the total.
Cross the line and the federal picture changes. A “manufactured home” is defined as a transportable structure that is eight body feet or more in width, forty body feet or more in length, or 320 or more square feet when set up on site, built on a permanent chassis and designed as a dwelling.4Office of the Law Revision Counsel. 42 USC 5402 – Definitions Most park models already exceed those thresholds on paper. They stay out of manufactured home regulation only because of the HUD RV exemption. If a unit exceeds 400 square feet and can no longer be certified to ANSI A119.5, the exemption falls away and HUD’s manufactured home construction and safety standards apply.2Federal Register. Manufactured Home Procedural and Enforcement Regulations – Clarifying the Exemption for Manufacture of Recreational Vehicles Different construction requirements, different installation standards, different inspections.
How Park Models Differ From Standard RVs
The RVIA definition also notes that park models may exceed 8.5 feet in width during transport.3RV Industry Association. Standards and Regulations Standard travel trailers and fifth wheels stay under that width to travel legally on public roads without special permits. Park models routinely run 12 to 14 feet wide. Moving one requires a professional transport company, a commercial driver, oversize load permits, and sometimes escort vehicles. You are not hitching a park model to a pickup and towing it to the next campground.
The construction standards reflect that difference. NFPA 1192 addresses fire and life safety for RVs that will move down highways regularly.5National Fire Protection Association. NFPA 1192 Standard Development ANSI A119.5 covers fuel systems, plumbing, and fire safety with the assumption the unit sits still for months or years.6RV Industry Association. Association and ANSI Adopted Standards That is why park models tend to feature residential-style finishes, full-sized appliances, and larger windows that would not survive constant highway travel. Once placed, most connect to external water, sewer, and electrical utilities the way a small house would, and many owners add decks, screened porches, and storage buildings. The unit looks and functions like a small home, but the paperwork says RV.
How Park Models Differ From Manufactured Homes
Manufactured homes are built under the federal HUD Code, which sets construction, design, and performance standards for structures intended as permanent, year-round dwellings.7eCFR. 24 CFR Part 3280 – Manufactured Home Construction and Safety Standards Those standards run heavier in areas like structural loads, energy efficiency, and wind resistance because the unit is expected to be someone’s permanent home. ANSI A119.5 is a lighter standard suited to recreational and seasonal use, not permanent occupancy.
Both sit on a chassis, but the legal description differs. Manufactured homes are built on a “permanent chassis,” with the drawbar, axles, wheels, and running gear treated as integral parts of the transportation system.7eCFR. 24 CFR Part 3280 – Manufactured Home Construction and Safety Standards Park models also have a chassis with wheels, but the hitch and axles are sometimes removed after placement. Whether removing them affects the unit’s legal status depends on state and local rules, not federal law.
The buyer experience separates the two clearly. A manufactured home comes with no manufacturer’s warning about recreational-only use, because the entire point is permanent living. A park model arrives with a kitchen-counter notice telling you the unit is not designed as a primary residence.1eCFR. 24 CFR 3282.15 – Exemption for Recreational Vehicles Ignore that warning and you can run into trouble with zoning enforcement, insurance claims, and tax assessments later.
Can You Live in a Park Model Full-Time
Not easily. The federal RV exemption that keeps park models out of manufactured home regulation specifically requires the unit be “designed only for recreational use and not as a primary residence or for permanent occupancy.”1eCFR. 24 CFR 3282.15 – Exemption for Recreational Vehicles Full-time occupancy is not itself a federal crime, but that language sets the tone for the local rules that actually govern where the unit can sit.
Many RV parks and campgrounds cap continuous occupancy, commonly at 180 days, to prevent residents from establishing legal residency. Zoning ordinances in most jurisdictions restrict park models to designated areas such as RV parks, campgrounds, or manufactured home communities, and prohibit placing them on residential lots. Some tiny home communities are zoned to allow year-round park model living, but those remain the exception. If full-time residence is the goal, confirm the zoning and occupancy rules for the specific parcel before you buy.
Titling, Registration, and Property Taxes
State rules on titling vary, and this is where the “is it an RV?” question turns most practical. Many states title park models through the motor vehicle department the same way they title travel trailers. Others treat them as personal property. A few handle them more like manufactured homes when the unit is permanently affixed to land. There is no uniform national approach, so your state’s DMV or housing agency is the right first stop.
Tax treatment follows from the classification. States that title park models as vehicles typically charge vehicle registration fees and possibly sales tax at purchase. States that classify them as personal property may impose annual personal property tax. And where a park model is permanently affixed to owned land, some jurisdictions assess it as real property, taxing it like a house. Two owners in neighboring states can end up with completely different bills for identical units.
Mortgage Interest Deduction
One tax rule works the same everywhere. The IRS defines a “qualified home” for the mortgage interest deduction as any property with sleeping, cooking, and toilet facilities, including mobile homes, house trailers, and similar property. A park model with all three can qualify as a main home or second home, and if the loan is secured by the unit, the interest may be deductible within the usual acquisition-debt limits.8Internal Revenue Service. Publication 936 – Home Mortgage Interest Deduction An unsecured personal loan used to buy the same unit will not qualify.
Business and Rental Use
If a park model is used for rental income or another business purpose, the unit is generally treated as tangible personal property rather than real property for depreciation. The One Big Beautiful Bill Act, signed in July 2025, permanently restored 100% bonus depreciation for qualifying property acquired after January 19, 2025.9Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill Listed property and personal use rules can limit the deduction, so run the numbers with a tax professional before assuming the full write-off.
Insurance
Standard auto policies do not properly cover a park model, because those policies are built for vehicles that move. Standard RV insurance comes closer but still leans on collision coverage and roadside assistance, which are not the real risks for a unit that sits in one spot for years. Park model insurance focuses on the dwelling itself: storms, fire, falling objects, theft of contents.
A few coverage gaps show up often enough to check before signing:
- Flood damage is excluded from standard park model policies. If the unit sits in a flood-prone area, a separate flood policy is essential.
- Earthquake damage is also excluded by default, though most insurers offer an endorsement.
- Transit coverage is often limited or excluded. Ask specifically for it if you might ever move the unit.
- Additions like large decks, screened porches, and sheds may not fall under the base policy. Additional structures coverage usually needs to be added.
If the unit is permanently affixed to land and your jurisdiction treats it as real property, a homeowner’s policy may fit better than an RV-style policy. Filing a claim under the wrong type of policy can lead to denial, so match the coverage to how your state actually classifies the unit.
Financing
Most buyers finance park models through RV loans, which behave like auto loans with fixed terms and rates. The other common route is a chattel loan, sometimes called a home-only loan, which treats the unit as personal property rather than real estate. Chattel loans typically require lower down payments than traditional mortgages, sometimes as low as 5%, but carry higher interest rates, often between 6% and 13% depending on credit and lender.
The financing choice interacts with the mortgage interest deduction. If the park model qualifies as a second home under IRS rules and the loan is secured by the unit, the interest may be deductible, which can partially offset a higher rate. The loan has to be structured correctly for that to work.
Moving a Park Model
Because most park models exceed the 8.5-foot road-legal width, moving one takes more logistics and money than moving a standard travel trailer. Expect to hire a commercial toter truck with an appropriately licensed driver. Most states require oversize load permits, typically running between $15 and $70 per state, plus potential fees for pilot or escort vehicles on certain routes.
That limited mobility is the practical reason park models exist in their own regulatory category. A standard RV can relocate on a whim. A park model relocation is a planned, permitted event. Park models are RVs on paper and behave like small buildings in practice, and holding both facts in view is what makes the zoning, tax, and insurance decisions after the purchase go smoothly.