Levels of the house

Third floor (BrE)

Above the second floor (BE)

Fourth floor (AmE)

Between the third and fourth floors (AmE)

First floor (BE)

When you come into the building, you need to go up the stairs once.

First floor (AmE)

It takes you outside, to the street.

Second floor (BE)

You can see the top of the palm tree.

Ground floor (BE)

You are at street level

Second floor (AmE)

Second floor (AmE)

You can see the top of the palm tree right outside your window.