These cluster homes are for the middle income earners and were constructed on vlei (expansive soils) ground. A lot of people always think that construction in expansive soils is more expensive. We have always demonstrated that a good design will reduce construction costs without necessarily compromising on strength and durability of the structure. This is one classic example were costs were shot down by a good special foundation design. Cluster homes built on expansive soils with special foundations. The structures are as solid as a rock.