According to housing corporation law, you must notify about all the work done in your apartment, except for painting or wallpapering dry areas.
If you are not sure if you have to make a notice, you can do so nevertheless.
Processing your renovation notice takes our agency 1–2 weeks. Take that time into account when planning your renovation.
Instructions for renovation to new apartment owners
Instructions for maintenance and alteration work to apartment owners
Renovation note for notice boards
Process and fees for doing maintenance work 2016.pdf