Mobile Home Inspection Checklist for Buyers and Owners

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Manufactured and mobile homes are built differently from site-built houses, and they fail differently too. The chassis, piers and tie-downs carry the home instead of a poured foundation; the plumbing runs through an insulated belly under the floor; the roof is often low-slope with long seams; and older units may have wiring, windows and heating equipment that would not be used today. A general checklist written for site-built homes misses many of those details. This mobile home inspection checklist walks through what to look at, area by area, explains why the age of the home matters so much, and covers inspection cost and financing questions. It is written for buyers, owners and anyone helping a family member evaluate a home, with notes for the Colorado Front Range where wind, snow and freeze-thaw cycles put extra stress on anchoring, roofs and underfloor plumbing.

Part of our Home Inspections Explained guide — start there for the full picture →

Pre-1976 Mobile Homes vs HUD-Code Manufactured Homes

The first question for any factory-built home is when it was made. Homes built after mid-June 1976 are constructed to a federal construction and safety standard commonly called the HUD code. Homes built before that are usually called mobile homes, and they were built before the federal standard took effect. In everyday use the terms overlap, but for inspection, insurance and lending the distinction matters.

A HUD-code home normally carries two kinds of identification:

• Certification labels. A small metal label, often red, is typically attached to the exterior of each transportable section, near one end. It indicates the section was built to the federal standard.
• A data plate. A paper data plate is typically found inside the home, often in a kitchen cabinet, a bedroom closet or near the electrical panel. It usually lists the manufacturer, serial number, date of manufacture, and the wind, roof-load and thermal zones the home was designed for.

Missing labels or a missing data plate do not prove a problem, but they can complicate financing and insurance, and replacement documentation may need to be requested through official channels. The design zones matter too. A home built for a lighter roof-load zone and later moved to a higher-snow area, for example, may not be suited to its new site. Buyers who are unsure whether the home is a mobile home or a manufactured home can read the guide to manufactured home inspections, which goes into the differences, and the general overview of a mobile home inspection.

Pre-1976 homes are not automatically unsafe, but they deserve a closer look at wiring, heating appliances, windows and fire safety, and many lenders and insurers treat them differently or decline them.

The Mobile Home Inspection Checklist, Area by Area

Inspectors approach manufactured homes with the same general method as any house: look at what is visible and accessible, operate normal controls, and report defects. The difference is in where the problems tend to hide.

Foundation, piers and tie-downs

Most manufactured homes sit on steel chassis beams supported by piers, often stacked concrete blocks or steel stands, with anchors and straps that tie the home to the ground. Some sit on permanent foundations or perimeter walls. Check list:

• Piers are plumb, sit on solid pads, and have shims tight against the beam rather than loose or missing.
• No cracked, crushed or leaning blocks, and no piers settled into soft ground.
• Tie-down straps are present, tight and not badly rusted, and anchors are not pulled up or exposed by erosion.
• Chassis beams show no major rust-through, bending or cut sections.
• Floors are reasonably level inside; doors and windows open and latch without binding.

Uneven floors and sticking doors often mean the home has settled and needs re-leveling. Missing or loose tie-downs are a wind-safety concern, which is especially relevant along the Front Range where strong downslope winds are common. The guide to mobile home foundations covers pier systems, anchoring and permanent foundation options in more depth.

Skirting and underfloor ventilation

• Skirting is continuous, attached and not broken or rotted at the base.
• Vents in the skirting are present and open so the crawl area can dry.
• An access panel exists and can be opened for inspection.
• No large gaps where animals can get in.

Skirting protects the underfloor from wind, snow and animals, but closed-in skirting with no ventilation can trap moisture. The guide to mobile home skirting covers materials and venting. Rodent evidence under the home is common; the guide to a rodent home inspection lists what to look for.

Belly wrap and underfloor plumbing

The belly wrap, also called the bottom board, is the fabric or plastic sheet under the floor that holds insulation and protects pipes and ducts.

• Belly wrap is intact, without tears, sagging or hanging insulation.
• No water stains, drips or wet insulation, which can indicate plumbing leaks above.
• Water supply lines are protected from freezing, and any heat tape is functional and in good condition.
• Drain lines are supported, sloped and connected, with no leaks at joints.
• Main crossover duct between sections of a multi-section home is connected and not crushed or lying on the ground.

Sagging belly wrap is often the first visible sign of a slow leak. In older homes, some supply piping materials have a poor track record, so the type of piping is worth noting.

Roof

• Seams, edges and penetrations on metal roofs are sealed, with no lifted fasteners or open joints.
• Roof coatings are intact rather than cracked, peeling or worn through.
• Shingle roofs, where present, are in reasonable condition with proper flashing.
• No ponding on low-slope roofs, and no signs of overloading after snow.
• Interior ceilings show no stains, especially along seams and near vents.

Low-slope metal roofs often rely on periodic recoating, so ask when it was last done. Some owners add a roof-over system with a pitched roof; if so, check how it was attached and whether the work was permitted.

Exterior walls, windows and doors

• Siding is attached and undamaged, with sealed penetrations.
• Windows open, close and latch; bedroom windows can serve as an emergency exit.
• Seals around windows and doors are intact, with no water staining below.
• Exterior doors close and lock, with sound thresholds.

Older homes often have single-pane windows in aluminum frames, which can condense heavily in cold weather and lead to stained or soft wall panels below.

Electrical system

• Service panel is accessible, labeled and free of signs of overheating or improper modifications.
• Service feed and grounding appear properly installed.
• Receptacles work, are correctly wired, and have GFCI protection where expected; an outlet tester speeds this check.
• No exposed splices, open junction boxes or extension cords used as permanent wiring.

Some older mobile homes were built with aluminum branch-circuit wiring, which can develop loose, overheating connections at devices that were not designed for it. Not every older unit has it, but if aluminum wiring is found, evaluation by a qualified electrician is the usual recommendation.

Furnace and heating

• The furnace is a model listed for use in manufactured homes, which typically draw combustion air from outside and vent through the roof.
• Venting is intact and properly sealed at the roof.
• No rust, scorching or soot around the burner area.
• Supply and return paths are open and ducts are connected.

Replacing a manufactured-home furnace with a standard residential furnace can create combustion-air and venting problems. If the label is missing or unclear, have an HVAC technician confirm the unit is suitable.

Water heater

• A temperature and pressure relief valve is present with a discharge line routed to a safe location.
• Gas water heaters are of a type suited to manufactured homes and are properly vented; many are installed in a closet with exterior access.
• No rust or leaks at the tank base, and a drain pan where needed.

Smoke and carbon monoxide alarms

• Smoke alarms are present and working in the expected locations.
• CO alarms are present where there are fuel-burning appliances.
• Alarms are not past their replacement date.

The U.S. Consumer Product Safety Commission recommends testing smoke and CO alarms monthly and replacing batteries annually. It says smoke alarms should be on every level of the home, outside sleeping areas and inside each bedroom, and CO alarms on each level and outside sleeping areas. The U.S. Fire Administration similarly advises installing CO alarms in a central location outside each separate sleeping area and on every level, and notes that CO poisoning can occur when a fuel-burning appliance such as a furnace or heater is not working or vented properly.

Interior floors, walls and moisture

• Floors are firm, especially in bathrooms, in front of the tub and toilet, at the kitchen sink and near exterior doors.
• No staining, swelling or soft spots on floor decking or wall panels.
• Bathroom fans work and vent outside.
• No musty odors, condensation damage or visible growth.

Soft floors are one of the most common findings in older manufactured homes, usually from long-term leaks at fixtures. The fix often involves replacing a section of decking and repairing the leak, which is manageable when caught early.

Common Problems at a Glance

What a Standard Inspection Covers and What It Does Not

Most home inspectors follow a published standard of practice. The ASHI Standard of Practice, for example, describes inspections that are visual and not technically exhaustive, and it says inspectors are not required to identify concealed conditions. It also says the inspector is not required to enter under-floor crawl space areas with less than 24 inches of vertical clearance, which matters for manufactured homes, where clearance under the belly is often limited. In those cases the underside may only be viewed from the access opening.

The ASHI standard also says inspectors are not required to determine compliance with codes, regulations or installation instructions. That means a general inspector may note that tie-downs look loose or missing without certifying that the installation meets the manufacturer’s instructions or state rules. When a lender or insurer needs a formal certification of the foundation or installation, that often requires an engineer or a specialist. A mobile home inspector who works regularly with factory-built homes may be more familiar with these details than a generalist.

Cost and Financing Considerations

Inspection cost

Inspections for manufactured homes are often priced similarly to or slightly below those for site-built homes of similar size, with add-ons for things like radon, sewer or septic, well water and wood-destroying insects. The guide to mobile home inspection cost covers typical ranges and what drives them, and general fee ranges for other services are listed under inspection cost.

Financing and why inspections matter

How a manufactured home is financed depends heavily on whether the buyer also owns the land. The Consumer Financial Protection Bureau’s research explains that land ownership plays a key role in whether a manufactured home is titled as personal property, often financed with a chattel loan, or as real property, financed with a mortgage, and that the distinction affects many aspects of the financing. The CFPB also found that borrowers with chattel loans faced higher denial rates than those seeking mortgages.

Lenders and government-backed loan programs may have their own requirements for manufactured homes, such as a permanent foundation, documentation of the data plate and certification labels, or a foundation certification. Requirements vary by program and change over time, so confirm them with the lender early. Inspection contingency periods are often short, and manufactured-home findings sometimes need a second opinion from a setup contractor, roofer, plumber or HVAC technician. Scheduling the general inspection early leaves time to get those quotes before the deadline, and written estimates make repair requests or price adjustments easier to negotiate. Buyers using VA financing may also want to read about VA home inspection cost, keeping in mind that an appraisal is not the same as an inspection.

Colorado Conditions That Affect Manufactured Homes

Factory-built homes along the Colorado Front Range face a particular mix of stresses, and a checklist works better when it is read with local conditions in mind.

Wind

Strong downslope winds are common near the foothills, especially in winter. Loose skirting, lifted roof edges and slack tie-down straps tend to show up after a wind event. Owners in exposed locations should walk around the home after high winds and look under it for shifted piers or loosened anchors. Buyers should ask whether the home has been re-anchored since it was set, and when.

Snow and freeze-thaw

Heavy, wet spring snow can load low-slope roofs, and repeated freeze-thaw cycles open seams and crack coatings. Underfloor water lines are at risk during cold snaps if belly wrap is torn, skirting vents are blocked open in winter, or heat tape has failed. Many owners check heat tape each fall and keep a light source or small heat source in the underfloor only where it is safe and approved for that use.

Dry air and sun

High-altitude sun breaks down roof coatings, sealants and vinyl skirting faster than in many other regions. Expect to recoat metal roofs and reseal penetrations more often, and look for brittle or cracked skirting panels on south and west exposures.

Radon and soil gas

Radon is common in Colorado. Any home in contact with the ground can have elevated radon, including manufactured homes. Pier-set homes with ventilated skirting differ from homes with basements, and homes on permanent foundations or with closed-in crawl spaces differ again, so the only way to know a particular home’s level is to test it. A short-term radon test is an inexpensive add-on during the inspection period.

Questions to Ask the Seller

Many problems in manufactured homes are easier to understand with a little history. Useful questions include:

• When was the home set on this site, and who did the installation?
• Has the home been re-leveled or re-anchored, and are there receipts?
• When was the roof last coated or replaced, and was a roof-over added?
• Have there been any plumbing leaks or frozen pipes, and where?
• Has the furnace or water heater been replaced, and with what type of unit?
• Have any rooms, decks or carports been added, and were permits obtained?
• Is the home titled as personal property or real property?

Answers do not replace an inspection, but they tell the inspector where to look harder. For more on choosing and working with an inspector, see the home inspection basics hub and the wider guide to the hiring process.

Tips Before and After the Inspection

• Find the documentation. Locate the data plate and certification labels before the inspection, and ask the seller for installation and repair records.
• Make access possible. Ask the seller to clear the skirting access panel, the furnace and water heater closets, and the electrical panel.
• Ask about moves. Homes that have been moved should be re-leveled and re-anchored at the new site; ask who did the setup.
• Look at the community rules. In land-lease communities, skirting, roof and exterior standards may be set by the community.
• Plan for seasonal checks. In Colorado, check heat tape and skirting before winter, recheck tie-downs after high-wind events, and look for roof leaks after heavy snow.
• Prioritize findings. Safety items such as gas venting, missing alarms and electrical hazards come first, followed by water intrusion and structural support.

References

• Consumer Financial Protection Bureau. Manufactured Housing Finance: New Insights from the Home Mortgage Disclosure Act
• U.S. Consumer Product Safety Commission. CO Alarms
• U.S. Fire Administration. Carbon Monoxide Safety
• American Society of Home Inspectors. ASHI Standard of Practice for Home Inspections

Looking at a manufactured home and want a second set of eyes on the underfloor, roof or paperwork? Reach out with the address and year built and we can point you toward the right inspection.