a young couple in there late 20′ or early thirties movie into a haunted house and he builds a model of a city in the attic. they find a book of some sort and for some reason they draw a door on a wall with chalk and somehow it turns into a 3D door and then the young couple go through the door into another world/dimention and its very strange.
Sounds like Beetlejuice.
Beetlejuice starring Alec Baldwin, Winona Ryder, and gena Davis