The 10y bond swap, which is often taken here as an indicator for the general trend of construction loan interest rates (because roughly that's how banks refinance themselves or something), has risen quite noticeably again since the beginning of the month. (About 15%) (Still significantly below the levels of mid-June, but slowly noticeably rising again), so we are currently restless (and dissatisfied with our property developer, who is also continuing to delay, even though we know that is partly due to the somewhat slow-moving city). So yes, so far interest rates have rather decreased again a bit, but I think for the moment that’s settled for now. However, I wouldn’t want to make any longer-term forecasts, no idea what it will look like in a month... With the key interest rate hikes it’s weird anyway. After the last one, even though it was higher than previously announced, construction loan interest rates began to fall shortly afterward. So it does not really correlate strongly for now...
I can’t really give a tip. Our property developer is aiming for a contract conclusion in September (but well, he also once aimed for August and it’s already clear that won’t happen) and our plan now is slowly to start asking banks for terms and then to actually send out a concrete loan application. It takes a while for that to be processed and we have the faint hope that we might actually have a notary appointment on the horizon. Ideally, we would get into the two-week window (i.e. finalizing financing <14 days before the notary contract with the developer), because if something spontaneously goes wrong, we could still call back. Whether that really works out, we’ll see...
For fun, we once checked theoretically what a prepayment penalty would be if we had financing but no house construction took place, and at least the rough estimate in an online calculator currently spit out something in the 100k range (with a 475k loan amount). I’ve partly read that banks sometimes settle for less or agree to a pledge swap (different object) without extra costs, but that seems to depend somewhat on the goodwill of the bank (which we are not really eager about...). No idea whether you can partly negotiate clauses into the loan contract with the bank for that, but we are too inexperienced for that.
For us, of course, the whole framework would change if the property developer project doesn’t work out (since we don’t even have a plot of land yet). So maybe something else again...