House given to son but left on mothers name

As Salaamu alaykum Mufti ?
Can you please advise me :
I am an only son married ( Have Three sisters) . I am living with my mother whom i support . She has consulted with a lwayer and drew up a will and left the house to me ( She has showed me the will and told me verbally) . I have spent alot of money renovating the house . We have decided to leave the house on her name due to finance of transfer etc . What happens upon her death does the house go into the estate .

Jazakallah