Is there a possibility to split my building society savings contract so that it becomes allocation-ready relatively quickly?
Yes; or rather, the BSK then finances it in advance. If the loan portion of the building society contract is under 30K, it doesn’t even go into the land register. Thus, it counts like equity in the lending ratio.
If the building society contract ranks second in the land charge, I get a much better interest rate from the banks, right?
Yes, however, it also depends a bit on who the first bank is and who the BSK is. If it is the "group-owned" BSK, more building society contracts are often sold than necessary (meaning more than 30K), and then the building society loan is no longer recognized or counted as equity.
1. the bonus interest disappeared (this will happen to you too) and
If you have a building society contract that has such, yes. But there are many BSKs that never offered building society contracts with bonus interest.
2. allocation including payout takes 3 months. Of course, you can insist on immediate payout, but then we are talking about a dissolution of the building society contract, which is even more "disadvantageous".
Pre-financing is the keyword.
So I am now in competition with another buyer. If he gets his approval faster, my dream bursts
Yes, they all say that. As long as no one comes with a suitcase full of small bills, they are all at the mercy of banks, brokers, and processes...
means, have the building society contract allocated and paid out, clarify everything with the bank in advance (what loan amount is possible, with which rate you feel comfortable, which loan structure is necessary, etc.).
@TE: Definitely get advice or have the entire plan calculated by the banks. Above all, don’t make any changes to the building society contract (splitting/etc.) or even withdraw without reason. Otherwise, you would have paid the completion fees for nothing, without "leveraging" the equity, especially if another property is in sight in the near future.