In real life, you'll use security systems and alarms to protect your home. Things are pretty much the same in The Sims 4. In the Build ... a separate one for each door leading outside.
Table of Contents How to find a burglar in The Sims 4 How to stop the burglar in The ... so if Robin Banks does come sneaking to your door you may have to deal with the problem yourself.
The burglar (and police and burglar alarms and so on) are all coming to The Sims 4 base game in a free update that goes live today, so go on and start installing those home security systems now.