Answer:
(Fatwa: 949/697/L=1431)
The total cost of this flat is halal for you. However, it is better if you give some amount in charity to the poor. Interest is the amount which you gave to the bank in addition. You should do tauba and istighfar for it.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
