House wasn't that bad, it wasn't very good, but...I feel like it was sort of a horror film. House 2: The Second Story isn't a horror film, and it is bad.
The film barely shares anything with the first film other than it happens in a house with some sort of ability to travel to another dimension is. The characters aren't very good, and there are a bunch of subplots that don't fit.
There are 2 other House films, House 3 which is even less connected to the other House films, and House IV which apparently is the true sequel to House (or maybe House 2). I won't find out.