Can I change the lock on my front door?

Recently the building manager of our building let workmen into my apartment to check my balcony for leaks while I was at work, despite me advising her by email that the apartment was not ready for the work to be done as I wanted to tidy the balcony first, and that I would email her when it was ready.

This is the second time workmen have been let into my apartment without my permission.

When I moved in, I did give a set of keys to the building manager “for emergency purposes”. However the manager clearly has a different idea of what “emergency” means (for me: a burst pipe, for her: it’s easier than organising a time for me to be home, which I’m alwys willing to do).

I value my privacy and don’t want strangers in my house without my knowledge, and before I have time to tidy up.

Because of this, I’d like to change the lock on my front door to prevent this from happening and ensure they always have to make sure I’m home before they enter. I know I could just ask for my key back, but there are a lot of people coming angd going and I can’t be confident that there is not another set of keys floating around.

Can I change the lock on my front door?