You should tell us a bit more about yourselves: Are you planning to have more children? Will you eventually return to full-time work? What are your living expenses like? What monthly payment are you currently making for the apartment? (Have you completely paid for it yourselves so far?) How large are the offered plots approximately?
I didn’t want to make the post too long...
So:
Family planning is definitely complete. At 38 years old, we are both already “out of that age”. The girls are slowly becoming easy to care for at 5 and 9, and we enjoy an almost carefree family life.
Regarding finances, we can save at least €2000 every month. We were able to save the €90k in about 6 years. (Although I was on parental leave for 1.5 years during that time). I would rather not increase my working hours to 100%. But it’s not excluded in about 10 years (for example, if our daughter wants to study in a completely different city).
At the moment, we pay €1100 for the current loan + additional costs approx. €250. We bought the apartment from the developer 9 years ago. The price back then was €250k. Last month, our neighbors sold their apartment (same layout on the upper floor) through a realtor. Price: €380k. It was gone after 2 weeks. Our apartment is better equipped, has its own garden, a high-quality glass-front kitchen, Bisazza mosaic tiles in the bathroom, a huge terrace... I assume we can ask for at least the same amount as the neighbors.
The building plots in the new development area are between 500 and 700m², fully developed. We would like to aim for about 550 - 600m². So we calculate around €180k + additional costs = €200k. We would therefore need to finance €100k variable (with €100k equity).
The house should be around 160-180m². No basement. After all, we want to expand. A young relative who is an architect would plan the house (quote: “I’ll design your house for a good racing bike”). Since we have many tradespeople among our acquaintances, we would carry out many services ourselves (tiling, landscaping, garage, roof insulation, drywall, floor and wall coverings...). I think around €400k + additional costs should be enough.
We could comfortably afford a monthly payment of about €1600-1800.