You can add a story to a split-level house, but doing so may not be the best investment or worth the hassle. There are many complications to adding a level to your home, Calisti said.
For example, removing the roof depends on good weather, and you need to be sure that the foundation and load-bearing walls can support additional weight. It may also be difficult to find an appropriate location for stairs between the main level and the added floor within the home’s existing layout.
“It doesn’t make sense financially if it costs more to add a new level than to expand outward,” Calisti said. “With more people seeking single-level living these days, we have found that adding a level to an existing home is one of the least requested improvements.”