If you like 70's fashion in all its polyester glory, then you will dig this groovy little film. If you're looking for a few scares and an interesting story, you better look elsewhere. Horror House is overrun by 70's runway model-types who are too hip for their own good. The outfits they wear are thoroughly entertaining, and the film spends way too much time in the front end setting up the story. We listen to them whine about how bored they are and how witty and clever they are…and that's about it. When the killing starts, the scenes are pretty tepid and offer no real scares.
The cast includes beach boy Frankie Avalon but they give him very little to do in the film. The rest of the cast is thoroughly British and will be unfamiliar to most Americans.
There is not much more to say about this one. It's not poorly made, it's just uninteresting. Find your horror entertainment elsewhere.
For more info check out the film's entry in IMDB.