Claim Home Improvements as Deduction when Renting to Fiance?

[Dominic Augustine]

Hello BP community, I am looking to buy a single family home and was wanting to know, if i rented to my fiance, while I am living there as well, can I claim the home improvements as a tax deduction? I would look to do the work myself so did not know 1) if this is legal when it she will become a family member as I have read that you can claim the % of the rental as a deduction when renting 2) If now that I am renting I have entered into the area where i will need to hire a professional contractor to do the work? Thank you and let me know of details that need to be filled in to get the best response!