How to fix the house when Renters are living in the house?

[Padma Mody]

I found one property and this single family house is rented under section 8. We were under contract and did inspection on Saturday. Since it is low price house, need some repair. In report, they found the water dripping noise and some rotten wood between bathroom and kitchen wall. So, my question is how can I fix this when renters are living in the house. I think, I have to redo the entire wall of bathroom to fix this problem. Can I ask tenant to empty the house for a week or so? I am thinking to redo the entire full bathroom and this house is with 1.5 bath, so they will be without the shower.