Some people say that building a house is taboo?

Believers have. There is no one who doesn't believe. You have heard this before. It's all superstition, because what happens every day won't be what you want. Believers will impose bad things on certain things, saying that they are unlucky, when, when and what happened, and then this happened. People who don't believe, anything will happen, and they won't think so much. At best, it means carelessness or inattention. Living in this world, what happens every day is a natural law. If you don't care about this and that, you can't live.