Steeply sloping ground can add to building costs since usually the area under the house has to be levelled, which could entail bringing in additional ground, or it could mean excavating into the slope to create a level platform. But creating a level area may also require retaining walls to be constructed to hold the banks or sides of excavations up. These walls can be costly and also unsightly. An alternative to reduce the amount of earthmoving is to design the house so that it has steps and that the various rooms are built at differing levels to accommodate and follow the sloping ground.
Sometimes semi-basements can be constructed which are built into the slope to minimise the filling.
Another solution is to build the house on stilts or columns so that the floor of the house, which is level, overhangs the sloping ground. The columns get longer further down the slope. This can be expensive, especially if the columns and house floor are constructed of concrete.
Potential problems for houses on slopes
But a steeply sloping property can create other problems which could include:
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