The difference between benching and underpinning is that, while they both create more height and space, their methods differ significantly. When you underpin your basement, underpins are installed to support the basement structure. Underpins are installed when excavating your basement and pouring the concrete.
This process also helps to strengthen your home’s structure as, while adding space, it also ensures any cracks in your foundation are repaired and filled.
Benching, on the other hand, will place footings around your basement’s walls. Also known as bench-fitting, this process does not require digging or excavation to add space. Benching is a more affordable option, but underpinning methods result in more livable space.