What kind of DIY work are you allowed to do yourself in Sweden?

As a homeowner in Sweden, you have significant freedom when it comes to do-it-yourself (DIY) home improvement projects. However, some work legally requires you to call in professionals.

What kind of DIY work are you allowed to do yourself in Sweden?
As a homeowner in Sweden, you have significant freedom when it comes to do-it-yourself (DIY) home improvement projects. However, some work legally requires you to call in professionals.