Calculation of house construction and the time thereafter

The house will comply with the Energy Saving Ordinance. We decided against KFW. In my view, the additional costs for KFW are not in proportion to the supposed monthly savings. It's probably a matter of belief.

A soil survey will still be carried out as a precaution, but there is nothing wrong with the soil (Yes, I know, some have been seriously mistaken before, that's why we're doing the survey ).

The exterior facilities are missing. Deliberately. This is a point we will postpone until liquidity is available again or if there is surplus liquidity.

From 01.01.2014, according to Sound, the new Energy Saving Ordinance 2014 applies... it probably corresponds to the Kfw70 standard, unless I am mistaken.

The bank will calculate a different estimate for you. First, the house comes with certain costs, then these are compared to your financial possibilities. Deficits can then be saved through EL.
Serious banks will not finance an eternal construction site, that is certain.
Therefore, there is no way around a preliminary talk at a bank. Then you are on the safe side as to whether you can take on the project or not.

That on the topic: what comes after the calculation!

A word about financing: I think the 420 € into the building savings contract is total nonsense. Put the 420 € into the repayment. The remaining debt will be significantly lower than with the building savings contract, and a high interest rate in the follow-up financing will not be a problem. Without the building savings contract, the house will be paid off faster than with the building savings contract, and the financing costs will also be significantly lower.

Of course, this refers to the example you mentioned ... you just have to work it out.

A word about financing: I think putting 420 € into the home savings contract is complete nonsense. Put the 420 € into the repayment. The remaining debt will be significantly lower than with the home savings contract, so a high interest rate in the follow-up financing is not a problem. Without the home savings contract, the house will be paid off faster than with the home savings contract and the financing costs will also be significantly lower.

I’m happy to do that. If the bank allows me to vary my installments within certain limits without an interest surcharge in case of a dry spell. Otherwise, the monthly burden for the duration of the loan is simply too high for me.

To me, that sounds somewhat like a one-sided perspective.

Even if the possibility of adjusting installments/repayments incurs an interest surcharge, financing without a [Bausparvertrag] can still be cheaper. You just have to calculate and compare it, as already mentioned. For that, you also have to obtain appropriate offers and not immediately rule out the different options.

Or you put the monthly 420 € into special repayments. Then you also remain flexible and end up cheaper than with a [Bausparvertrag]. Of course, that also depends on the conditions of the loan.

If you choose the option with a [Bausparvertrag] and the case occurs that the 420 € are no longer affordable for a while, there can also be problems with the allocation (which then happens later) and you have to bridge the financing. Not exactly ideal either.

An independent consultation would certainly not be a bad idea.