Special repayment of something or saving up for house construction

Hello We are currently living in a condominium that is still being financed. So far, we have always made the full special repayments. At 1.5% interest, it doesn't make much of a difference, but it looks nice how quickly the debt decreases. Now to the question. We will have the opportunity to buy a plot of land in the next 36 months and want to build. When the purchase/construction and financing will start is still uncertain, but the fact is that it will happen sometime within the next three years. Does anyone have experience whether it makes sense to continue making special repayments in order to get more money when selling the apartment or rather just continue normal repayments and save the money instead of special repayments to have it available for the first ancillary building costs? I understand that we save interest through the special repayments, but my question concerns all the other factors. Thanks in advance

I would continue to repay. Because the loan interest rates for a new loan are below 1.5 of the old one. So. Get rid of the expensive debt to take on cheap debt.

The old debt is repaid by the sales price one way or another. Whether now or later only differs in the interest saved during this period. For the calculation of the prepayment penalty, it will be irrelevant.

Basically, saving interest is of course nice, but for the property purchase you will need cash ([Kaufnebenkosten]). If you can even pay the entire property in cash, you don't have to take out the "big" loan directly and can save construction period interest, which is significantly above 1.5% and is due on the undrawn loan amount. Whether this is a good idea depends on the ratio of your savings rate per year to the expected property price.