How to do rehab while there is a tenant there?

[Fahadbin Alam]

Hello BP so I revently bought my first property and there is a tenant already there, so I think it's a good thing since I can have some cashflow coming in. 

For this property I had already paid it all cash from my own earnings and now I'm trying to rehab it, utilizing the BRRRR method. Now how would one rehab while a tenant lives there. Should I put it in the lease that I will be rehabbing while they live there? Would the tenant be happy if I fix up the house they live in?