To provide a helpful response, I would need the specific changes you are considering. Without that information, I can suggest that impractical changes might include:
- Aesthetic modifications that detract from functionality (like elaborate decorations in a warehouse).
- Expanding the building’s structure in a way that complicates its purpose (such as adding unnecessary floors to a single-story storage facility).
- Implementing advanced technology that is too costly and does not significantly improve efficiency (like high-tech automations in a very low-volume factory).
Feel free to provide the list of changes you're considering, and I can help identify which would be impractical!