Picture of a self-built mansion with a swimming pool

Quick answer：

A self-built mansion with a swimming pool typically refers to a residential property that has been constructed by the owner, featuring a swimming pool as one of its amenities. These types of homes are often customized to the owner's preferences and may include various architectural styles and luxury features. Swimming pools in such mansions can range from simple to elaborate designs, often complemented by surrounding landscaping and outdoor amenities.