Building a house does not start directly from the second floor, but needs to dig the foundation again, that is to say, building a house with four floors is actually tearing down two floors and building six floors again! If you do this, you can consider separating the water and electricity on each floor and building the stairs on the outside of the side, which means you can climb the stairs from the outside of the house to the sixth floor and build a door at the entrance of each floor (as shown in the picture).

In the future, each floor will be independent and convenient, depending on which floor your sister-in-law intends to have. In order to avoid future disputes, it is better to write down some problems that may be encountered in the future. Let's discuss it and write a written agreement. As long as the signature is pressed, it has legal effect, and each party holds one copy. It was only because I saw my determination to build a house that I proposed it. In fact, if you have the strength at home, you can build another floor at your own expense. Why? Living on the third floor is enough. Don't say that you are in debt for a house just because you won't let the sixth floor be built in the future. Now your sister-in-law is begging you to put in a good word, of course. After the house is built, especially after the demolition or selling, as long as your sister-in-law has different opinions, it will be very troublesome! The house was originally for people to live in, but it is not good for people to become house slaves! My personal suggestion is that instead of building six floors in debt, it is better to raise funds to build four floors at most. The sixth floor is still a little high, so it's inconvenient to get up and down!