A lot for a manufactured (mobile) or modular home needs a cleared, drained pad with every stump, root and bit of sod gone from where the footings or foundation will sit, a delivery route wide and open enough for the house to arrive in sections, and the septic and power locations settled before the trees come down. In North Carolina the state set-up rules also require the ground under and around a manufactured home to be graded so water drains away and does not stand.
Manufactured or modular changes the site work
The two are built to different codes and arrive differently. A manufactured home, the modern mobile home, is built to the federal HUD code in force from June 1976, on a permanent steel chassis, and is towed to the lot in sections. A modular home is built to the same state and local codes as a site-built house, trucked in on flatbeds and usually set on a foundation by crane. For the site that means different things: a manufactured home needs a drained, prepared pad and a route for long sections to back in, while a modular needs a foundation, room to set up a crane and a clear swing over the lot.
What North Carolina's set-up rules ask of the ground
North Carolina's Regulations for Manufactured Homes, kept by the Office of State Fire Marshal, set out the site preparation. Vegetation under the home has to be cut to no more than two inches above grade, and all sod, stumps and other organic material has to be removed from where the footings will sit. The ground under the home and for at least ten feet around it must be graded so water does not stand, generally falling half an inch per foot. Footings go on firm, level undisturbed soil or compacted fill free of organic matter. The manufacturer's installation manual governs the rest. In South Carolina, ask the installer and the county building office.
Stumps under footings come out
Because footings have to sit on undisturbed soil or controlled fill, a stump under a footing line cannot simply be ground and covered. Either the root ball comes out whole and the hole is filled in compacted layers of clean soil, or the home is positioned so its footings miss the old stump holes. Grinding is fine elsewhere on the lot, in the yard and along the edges of the drive, and it is the tidier choice there. Full stump removal explains how root balls are lifted out and the holes backfilled. Tell your installer where the old trees stood so the footing layout can be checked.
The delivery route is part of the clearing
A home that arrives in long sections behind a truck needs a route it can actually travel: wide enough, with turns gentle enough for the length, firm enough not to bog down, and clear of low limbs overhead. A modular set by crane needs a level, firm spot for the crane near the foundation and a clear swing path with no wires or trees in it. Get the hauler's or dealer's requirements in writing before clearing, then clear the route and the setup area along with the pad. Widening a drive while the home sits waiting on the road is the expensive version of this job.
Septic, well and power before the pad
On a lot without sewer, the septic permit decides where the home can sit. In North Carolina that starts at the county environmental health office, whose improvement permit shows where the system and its repair area go; in South Carolina, the Department of Environmental Services issues septic permits. Once those areas are set, keep delivery trucks, cranes and soil piles off them, since North Carolina's guidance tells owners to protect them from disturbance and not to drive over them. Mark the well site and the route for the power line too, and keep the pad, the drive and the drain field from crowding each other.
Pads on slopes and clay
Few lots here are flat. On a mountain lot the pad is usually cut into the slope with some fill on the low side, and the cut bank and fill slope both need shaping and cover so they do not wash. On Upstate red clay, the soil drains slowly and turns slick when wet, so the fall away from the home matters even more. In North Carolina, a project disturbing more than one acre needs an approved erosion control plan, and sediment must stay on the lot whatever the size. Grading and excavation covers cutting and shaping pads.
What to send for a quote
A few things make the price accurate. The type and size of the home, or its floor plan. The septic permit drawing if you have it, or the area the health department marked. A sketch of where the home, drive and any outbuildings will go. Photos from the road, from where the home will sit, and along the delivery route. Note any trees you want kept and any stumps already on the lot. With those, clearing, stump removal and the pad can be priced as one job instead of three. How to clear land for a house covers the same order of work for a site-built home.
Common Questions
Do stumps have to be removed under a manufactured home?
Under the footings, yes. North Carolina's set-up rules require sod, stumps and other organic material to be removed where footings will go, and vegetation under the home cut to no more than two inches above grade. Footings must sit on undisturbed soil or compacted fill. Check the home's installation manual for anything stricter.
How much room does a modular home delivery need?
It depends on the size of the sections, the truck and the crane, so get the requirements from the dealer or hauler before clearing. Plan for a firm, wide route with gentle turns and no low limbs, a level place for the crane, and a clear swing path to the foundation.
Can a mobile home go on a lot that was just cleared and graded?
Yes, if the footing areas are on undisturbed soil or properly compacted fill, the stump holes under them were backfilled and compacted, and the ground drains away from the home. Loose fill pushed into old stump holes settles, and a home set on it can go out of level.
What to Do Next
Getting a lot ready for a manufactured or modular home? Send the plan, the septic drawing and photos with your town, and Jordan will price the lot clearing, stumps and pad together. (828) 574-4474.