Yes, you can, but it depends on several factors like local building codes, the structural integrity of the existing house, and your budget.
Sure, you can build an addition on the second floor of a house. But first, you have to assess if the existing structure can support it. Also, you need to comply with all the legal requirements and hire experienced contractors.
It's possible to build an addition on the second story of a house. However, you need to get proper permits, have a detailed architectural plan, and make sure the foundation and framing can handle the extra weight.