There are a lot of laws governing Singapore, but did you know that there are laws put in place for those living in HDB flats too? And that’s not surprising, given that about 80% of the Singapore population live in HDB flats—those laws keep us and the people around us safe within our living parameters. However, there are some trade-offs that can come with these rules and some of these regulations might even come as a shock to those who are unaware about them. Here are nine things that we bet you didn’t know were considered illegal to do in a HDB flat, even if it’s in your own house! Scroll through the gallery to find out if you are actually secretly guilty of any of these!