A home in which the main floors are split and offset by ½ a story. The main living area is divided into three levels connected by two sets of stairs. Most tri-levels have a basement under the main floor. A small number of tri-levels in Wisconsin have a full basement that is also split like the main floor. Tri-levels became popular in Southeastern Wisconsin in the early 1960s, but they did not enjoy widespread appeal like Cape Cod and Ranch homes had in the post war era.

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