Buying a Used Mobile Home in Horry County? Check These Before You Sign

September 3, 2026

Manufactured homes trade constantly around the Grand Strand. Retirees arrive, retirees downsize, estates settle, and park homes change hands quietly without much of the machinery that surrounds a stick-built sale. Which means an awful lot of used mobile homes here are bought on a walkthrough, an asking price, and a handshake.

The expensive problems in a manufactured home are all underneath it, and none of them are visible on a walkthrough. Here is what to check, in the order that matters, and what each one costs to fix if you find it.

Start with the marble, not the paperwork

Before anything else, set a marble on the floor in three different rooms and watch which way each one goes.

It works because it tests what your feet cannot. A slope of a quarter-inch over ten feet is invisible to a person walking and obvious to a marble. What matters is consistency: a marble that rolls the same direction in every room means the frame is low on that side. One room disagreeing with the others is more likely a soft spot in the subfloor over a pier that has stopped carrying load, which is its own problem.

Then walk the home and check:

• Every interior door. Do they latch? Do any drag on the jamb? A racked opening is not a rectangle anymore.
• Windows, for binding in their tracks and cracks at the corners.
• Wall and ceiling joints, especially over doorways, for opening cracks.
• On a doublewide, the marriage line. A seam gapping down the centre at ceiling or floor is close to conclusive: the two halves are no longer sitting at the same height.
• Floors, by walking the whole length, feeling for bounce and soft spots. Pay attention around bathrooms, the kitchen, and exterior walls.

That is a ten-minute pass and it will tell you most of what you need to know about whether the frame has moved. The settling self-check scores the same list if you want it structured.

Then get under it, or pay someone to

This is the part people skip and the part that decides the number.

Pier condition. Blocks should be square, uncracked, and tight against their caps. Any pier you can rattle by hand is carrying nothing, which means its load went to the piers either side and they are now working harder than they were designed to. Reset runs $75 to $150 per pier; rebuild runs $150 to $400.

Pads. Concrete footing pads pressed into soft ground, tilted, or cracked mean the ground under them has been wet. Look for the sand around them being scoured or channelled.

The belly wrap. The black sheet under the floor joists should be intact and sealed. If insulation is hanging out of it, or there are open tears, ground moisture has been loading into that subfloor for as long as it has been open. Patch $300 to $800; full re-wrap $1,200 to $4,500.

Standing water or damp ground. Both a settling problem and a rot problem. See water under a mobile home for what each version costs.

Anchor straps. Count them, then grab them. Slack straps do nothing in a storm, and a home that settled leaves them slack by definition. Near the water, check the anchor shaft at the ground line for corrosion, because that is where it thins while still looking installed. The tie-down planner will tell you roughly how many a home that size should have.

Ductwork in the belly. Sweating or disconnected ducts put water into the insulation from the inside, and it is a common find on homes that have had “no water problems”.

Know the home’s age, and what it means

Two dates matter on a manufactured home in South Carolina.

Mid-1994, when HUD raised its wind standards. Every acre of Horry County is Wind Zone II, rated to 100 mph. Homes built before that update are the ones most often short on anchoring for this county, and bringing one up to standard is a real cost, not a formality. Anchor work runs $600 to $3,500.

1976, when the HUD Code took effect. A home built before that is not a HUD-Code home at all. It has no wind zone rating, no factory anchoring specification, and it is worth knowing that financing and insurance both get considerably harder.

The data plate and the HUD certification label will tell you. If nobody can produce either, treat that as information.

Ask about the last time anyone was underneath

The single most useful question you can ask a seller: when was this home last releveled, and by whom?

On Horry County’s sandy coastal-plain soil, three to five years is the honest maintenance interval. A seller who says “about four years ago, here’s the invoice” is telling you the home has been looked after. A seller who does not know, or says it has never needed it, is telling you something different, especially on an owned-land home where nobody was ever going to ask.

The gap matters most on inland homes. A home on family land out toward Loris or Aynor may sit on better ground than a beach park home, but it has also almost certainly gone longer without a crew under it, and the deferred work compounds quietly.

Get it in writing before you sign, not after

A pre-sale leveling inspection runs $150 to $350 and produces a written report: level readings pier by pier, support condition, and a tie-down check. Buyers use it to negotiate, sellers use it to head off a renegotiation, and park managers and lenders often want one anyway.

Compared to the numbers on this page it is close to free, and it converts every “probably fine” on your walkthrough into a number. We credit the inspection cost toward any work found, which means if it does turn up a problem you were going to fix anyway, the report cost you nothing.

If the home is being moved to your land

Different job, different paperwork. Setting a home in unincorporated Horry County means a permit through County Code Enforcement with a licensed manufactured home installer named on it, an address verification form, a tax sticker, septic approval or a sewer receipt, Wind Zone II verification, and a $1,236 impact fee, with an exemption available if you are replacing an existing home within a year.

The full checklist is on our Horry County permit page, and how to verify an installer’s state licence in two minutes is here.

The short version

Marble test, doors, marriage line, then get under it. Age the home against 1976 and mid-1994. Ask when it was last releveled. Spend $150 to $350 on a written inspection before you spend tens of thousands on the home.

If you want a range on the leveling work before you make an offer, the calculator will give you one in a minute.