My question is in regard to living with in laws.

Before we got married my husband told me that we will be living with his parents. At that time I agreed. It has been 5 years now and it is getting more difficult since I have children. Do I not have the right to have my own privacy meaning living in a separate accommodation? What would the ruling be in my case? How can I convince my husband?

There is no shari requirement however since you agreed beforehand it is a difficult situation.

You should discuss with your husband and try to convince him that you need to live elsewhere.