from facts stated by you it appears your mother is absolute owner of the house . she has made a will bequeathing 30%share in said house to you . please clarify as to what share has been bequeathed to your brother . .

your mother can during her life time execute gift deed in your favour . on such gift deed being made you would be absolute owner of said house . the house would be transferred in your name

A will takes effect on death of testator . if she has bequeathed 30%share to you on her death you and other legal beneficiaries under will would become owners of said house . you can transfer your share later to your wife .if house is in mumbai you may need probate of will .

you dont need your brother NOC for transfer of share bequeathed to you under will . contact a local lawyer .