Construction financing - follow-up financing experiences?

Hello dear homebuilders,
we are considering building a house and I wanted to share some experiences regarding our financing:

Income side:
We are both civil servants (A 14 full-time and A 11 future part-time), 2 children.
This results in a net income of about 5,000 euros in the future including child benefits and already deducted private health insurance.
Calculated with part-time of about 40 - 50 % in A 11.
At the moment I am still on parental leave and so we currently have only 4,000 euros net. As soon as the construction is finished, I could start working again, and we could also possibly rent out a guest room in the new house (250 euros net).

Costs:
House with basement 330,000 (140 m²)
Plot 160,000
Development with new sewer 15,000
Additional construction costs and excavation 45,000
Outdoor facilities 20,000
Parking space/ carport 5,000
Kitchen 10,000
Photovoltaics 10,000
Own work: 25,000

Total: 570,000

Equity approx. 90,000

Loan 480,000

100,000 euros at 1 % from Sparda-Bank (already now for building plot) results in a monthly rate of 250 euros at 2 % repayment, term 10 years

240,000 euros via Z15 loan from the L-Bank with 0.5 % interest and 2 % repayment results in 500 euros monthly, term 15 years

140,000 euros as supplementary loan from the L-Bank, term 25 years, full repayment loan, i.e. fully repaid in 25 years. 2.39 % interest and 3.08 % repayment, monthly rate 650 euros

That means 250 + 500 + 650 = 1,400 euros mandatory rate plus additional costs for the house.
Additionally, we would aim for a special repayment for the Sparda-Bank (since only 10 years term) of 400 per month. That would be 1,800 euros/month plus additional costs.

After 15 years, we would still have 165,000 euros outstanding from the Z15 loan.
The rate of 650 euros for the supplementary loan runs fully for 25 years.

What do you think about this?
How would you secure the 165,000 euro follow-up financing in 15 years?

Many thanks and greetings from Baden-Württemberg.

Three different terms are bad. You always have to refinance a portion of the financing each time...

I know, now you will say that the Sparda contract will expire after 10 years, but this will most likely not be the case, since what you aim for will never be 100% feasible.
The 400 that is supposed to be for the ST can quickly be sunk into a car or a short vacation.
Can't you increase the repayment later on here?

Regards, Yvonne

I would advise a "non-civil servant" against financing at that amount. We have a 500k loan but with significantly higher income. As a civil servant, however, one can probably dare that without worry. The budget for the house & additional building costs also seems to fit. I would definitely exclude child benefits and rental income from the income. You are building a nice little house and really want to rent out a room to finance it?

So the interest rate for 15 years is quite good. That means I would try to do as much as possible with this component. At the beginning, the burden would not be that high. In my opinion, rather lower installments and special repayments.

You have 2 banks in the concept, does one of the banks accept subordinate status?

Does the photovoltaic system really pay off or is it necessary? I have my doubts about that. These 10,000 euros are financed expensively over 25 years.

Hello dear builders, we are considering building a house and I wanted to get some opinions on our financing:

Income side: We are both civil servants (A 14 full-time and A 11 future part-time), 2 children. This results in a net income of approx. €5,000 in the future including child benefit and already deducted private health insurance.

€240,000 via Z15 loan from L-Bank with 0.5% interest and 2% repayment results in €500 monthly, term 15 years

€140,000 as supplementary loan from L-Bank, term 25 years, full repayment loan, i.e. fully repaid in 25 years. 2.39% interest and 3.08% repayment, monthly rate €650

That means 250+500+650 = €1,400 mandatory rate plus additional costs for the house. Thank you very much and greetings from Baden-Württemberg.

Have you already contacted L-Bank regarding the Z15? In my opinion, you are well above the limit to get that?

In my opinion, you are clearly over the limit to get that?

At the moment, the OP is on parental leave