In the traditional African society, there were very few construction options. Ideally, most homes, if not all, were mud-walled with a straw roof. The houses remained cool during the day and warm during the night.
Fast forward to the 20th Century and this ideal house was slowly replaced by the brick and mortar home that came with colonial progression. Well to do Africans fell over each other as competition for the best designed and biggest house gained momentum.