I am looking for a good offer for home financing

Good day experts,
I would like to know your opinion about the financing offers for the purchase of a house. I will try to keep it brief.

Here is the purchase price including additional costs and renovation:
House €410,000
Additional costs (broker, notary, etc.) €48,000
Renovation €80,000

Equity €115,000
Financing €430,000

Offer 1
I have been with Sparkasse for years and of course I got the first offer directly from my bank.
For the first 15 years, I would have to pay a rate of €1,813/month with an interest rate of 2.37% and for the second 15 years a rate of €1,684 with an interest rate of 2.8%. I was told that the interest rates are negotiable, like at a bazaar. I should provide them with a better offer and Sparkasse would then make me a corresponding counteroffer. Simply unbelievable. So moving on to...

Offer 2
From Postbank/BHW:

Loan 1

KFW (Program 124) of €38,000
Fixed interest period 10 years
Interest rate 1.65%
Monthly rate (months 1–12) €52.25
Monthly rate (months 13–120) €378.86
Outstanding balance at end of term €0

Loan 2

Fixed mortgage of €392,000
Fixed interest period 10 years
Interest rate 1.64%
Monthly rate months 1–120 €1,123.73
of which savings portion €588.00
of which interest portion €535.73
Outstanding balance after interest fixation ends €321,440
Option 1 => monthly rate of €1,500 continuously
Term 20 years and 3 months (total term 30 years and 3 months)

Option 2 => monthly rate of €1,800 continuously
Term 16 years and 6 months (total term 26 years and 6 months)

Attached are the repayment plans of [Postbank]. I have removed the repayment pages due to the file size.

Hello, I took the time to look at the tariff structure of the mentioned BHW building savings contract. So the interest and repayment payment is at least 6 per mille of the building savings sum. Therefore, the rate after 120 months would be at least 1928 EUR p. m.

Building savings has a significant disadvantage. You invest the savings performance in the first 10 years interest-free against a fee of 3210 to 6420 EUR (depending on the building savings contract fee 1-2 %). Yes, you read that correctly: high building savings fee and in addition an interest-free investment of your monthly savings contribution. What do you actually get for that? You get an interest rate guarantee for in 10 years (But only with positive credit check in 10 years). So you get an option that only makes sense if the effective annual interest rate is lower than the then prevailing interest rate with the same fixed interest period. In addition, you do not receive 1.25 % if you decide on a longer fixed interest period than variable up to 2 years. BHW scales the interest rate up to about 1.70 % depending on the fixed interest period.

If you use the savings performance directly for repayment, you save with the first repayment rate of 588 EUR 1.65 % interest p.a. Now consider the compound interest effect. That means 588 x 1.0165^10 and calculate the further future rates of 588 EUR each and 119 payments and the corresponding interest saved through interest and compound interest... What ultimately does the interest rate guarantee cost under the line? Exactly, at least the building savings fee + further fees + the biggest chunk: the otherwise saved interest and compound interest with direct repayment!

Calculate a full repayment over 15 or 20 years or 25 years (no renewed credit check). There are also banks that offer 30 years. For full repayment loans, there are interest discounts that reduce the interest rate increase due to the extension of the fixed interest period somewhat. Where in NRW are you building? Currently, some regional savings banks have good offers in connection with KFW financing, as these are not included in the loan-to-value ratio.

KfW programmes are also offered by other banks. Offer 1 is too expensive, offer 2 has already been explained. Get an intermediary involved. Briefly about the renovation. Look for a bank here where the disbursements also work. 80,000 is not without (the subject of invoice template etc.)

Yes, move away from the building savings contracts and look for a normal annuity loan for 15 or 20 years. Then finance part of it through the [KFW Programm]. Unfortunately, the savings banks do not offer something like that and always come with their building savings contracts....

Hypo, Sparda, Raiffeisen also finance for longer.

Hello, I took the time to look at the tariff structure of the mentioned BHW building savings contract. So the interest and repayment performance is at least 6 per mille of the building savings amount. Therefore, the rate after 120 months would be at least 1928 EUR per month.

Building savings has a serious disadvantage. In the first 10 years, you invest your savings performance against a fee of 3210 to 6420 EUR (depending on the building savings conclusion fee of 1-2 %) interest-free. Yes, you read that correctly: high building savings fee and on top of that an interest-free investment of your monthly savings contribution. What do you actually get for this? You get an interest rate guarantee for 10 years (but only with a positive credit check in 10 years). So you get an option that only makes sense if the effective annual interest rate is lower than the then prevailing interest rates at the same fixed interest period. In addition, you will not receive 1.25% if you decide on a longer fixed interest period than variable up to 2 years. BHW scales the interest rate up to about 1.70% depending on the fixed interest period.

If you use the savings performance directly for repayment, you save with the first repayment rate of 588 EUR 1.65% interest p.a. Now consider the compound interest effect. That means 588 x 1.0165^10 and calculate the further future rates of 588 EUR each and 119 payments and the corresponding interest and compound interest saved... What does the interest guarantee ultimately cost under the line? Exactly, at least the building savings fee + other fees + the biggest chunk: the interest and compound interest otherwise saved with direct repayment!

Calculate a full repayment over 15 or 20 or 25 years (no new credit check). There are also banks that offer 30 years. For full repayment loans, there are interest discounts that somewhat reduce the interest increase due to the extension of the fixed interest period. Where in NRW are you building? Currently, some regional savings banks have good offers in connection with KFW financing, as these are not included in the loan-to-value ratio.

Thank you very much for your work.
A few questions regarding that:
1) I was promised in writing, but nothing official yet, that the rates are as stated there, even after 120 months and not a cent more!!! According to your calculation, 0.6% of 322,000 euros, so 1928 euros.
According to his calculation, 1500 € with 1.25% after 120 months until the end of repayment.
Are these all lies?

2) Another credit advisor, but not a reputable one, told me that the repayment plan as such is completely wrong, would not work, and even accused the Postbank credit advisor of fraudulent intent. It is criticized that after 120 months the minimum savings balance has not been reached so that it is sufficient for allocation. The man from Postbank argues differently and says that BHW does not set a minimum savings balance beforehand. Is that so? Who should I believe?

3) As I understand from your text, you prefer full repayment, is that correct?

4) I am not building, I am buying a house in Saxony.