Let’s observe the most expensive components and works you need to cover:
Modifying the first floor – before the reconstruction, you need to think about your first floor and the corresponding reconstruction of it. The walls need to be repaired and reinforced because they have to support a new weight of the second story. Many people usually add to this work the replacement of windows and doors.
Plumbing/Electricity
When adding a new story, you need to change, upgrade or remove electrical wiring and plumbing.
Exterior construction
You need to include the expenditures on exterior decks, rooftop decks, and wrap-around porches. In addition, think about the reconfiguring exterior landscaping, fencing, and other site work.
Foundation work
After observing the condition of your current home, the builders can propose to support the new level according to foundation requirements for adding a second story, and as a result, it could add extensive time, costs, and challenges to the project, but it is obligatory to ensure safety and stability.