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Do Modular Homes Need A Foundation?

There are many reasons to construct a modular home. Not only are they versatile, they are also a great way to recycle used storage units, can be environmentally friendly and are easily portable.

Although in some cases planning permission is not required (a modular home could be classified as a temporary building), we advise that you account for planning permission before beginning your project, buying a module, and arranging delivery.

In any case, choosing where to place your unit is an important decision, especially as you will need to consider the foundation necessary for it.


Unlike the building of a bricks and mortar house, getting the right foundation is a relatively easy task, albeit equally important. A foundation is critical to the stability of your home as land can easily move in instances where there is extreme weather or rain.

Generally, you have a choice of four different foundations that you can use.

Foundation Types

The four different types of foundation which you can lay for your home are:

1.     Pier Foundations

A pier foundation is the most common and least destructive way of securing your portable home. It typically consists of a concrete block (usually of about 50cm³) embedded into the land on each corner which is sometimes reinforced with additional blocks in the middle if you have a larger unit

The pier foundation will usually give an adequate foundation and doesn’t involve extensive digging to be done. Any DIY expert can do it, so you don’t need to get specialist builders in.

2.     Slab Foundations

When you lay a slab foundation, you will lay a whole slab of concrete onto the ground to offer a strong and sturdy base for your home. This kind of foundation is sometimes needed when the ground is especially soft to ensure that the home doesn’t move.

Laying a slab foundation is a lot more labour intensive as you will need to excavate the entire area where you are planning on putting your module. This means that you need to hire specialists to carry out the work, which can mean more upheaval as well as a higher cost.

3.     Pile Foundations

Pile foundations are usually only used as a last resort when the land is really too unstable to support your home. In this case, solid steel tubes are hammered into the ground until they reach a depth where the ground is stable. These rods are then surrounded by concrete for more stability and the unit is placed on top.

This is the most expensive kind of foundation for a module as it requires specialist workers, specialist equipment and a significant amount of digging.

4.     Strip Foundations

Strip foundations are a less expensive and less work-intensive version of a slab foundation. A strip foundation is where concrete blocks are placed all around the perimeter of where it would be, or at each end. It will have a similar effect to a slab foundation, except less concrete is used. Digging will still be necessary, however.

Strip foundations are not only less expensive than a slab foundation, but can also be effective if rubble is laid as a water drainage system in areas where there can be a lot of rain.

Laying the right foundation is key to giving your modular home a good basis and ensuring its stability for years to come. With the right foundation in place, it can be converted into a highly functional, stylish and eco-friendly living space for a fraction of the cost of a traditional house.

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