Of course, the landlord's consent is required, and the landlord also needs to go to the bank to sign the contract, because the house payment is paid to the landlord's account. At the same time, the bank needs to consult the landlord to see if the down payment is in place.
Besides, when you go to the bank for a loan, the house is not yours yet, so what do you use to get a loan from the bank?
In fact, the collateral for your loan is the house, and when you apply for the loan, the house has not yet been transferred. You are applying with the landlord's house, and you will apply for a mortgage after the transfer. Therefore. The landlord's consent is definitely required.