Building an upstairs extension can significantly enhance your home's value and living space, but costs can vary widely based on factors like size, materials, and local labor rates. Considerations such as structural integrity, zoning regulations, and design aesthetics also play a crucial role in the planning process. It's essential to weigh the benefits against potential challenges, including disruption during construction and the need for permits. Ask Improvi.ai for personalized guidance on budgeting and planning your upstairs extension project!