300k budget for a 130 sqm single-family house?

I come from a good middle-class background. Until the age of 9, I shared a 12m² room with my younger sister, after which my parents added an extension and it became just under 20m², but with a lot of sloping ceilings. 15-17m² is good, no question, that fits a child's room, even though I am increasingly noticing among my acquaintances that children's demands today are different: - In the past, it was dolls, Playmobil, and Lego - Today, by the age of 10, a TV and a 1.40m bed also have to fit in - then preferably a sofa by the age of 12 - the school supplies and thus the space requirement also seem higher to me than before, and PCs/laptops in the children's room are not uncommon Many things can be accommodated in 12m², but with a wardrobe, a slightly larger bed + desk, there isn’t much space left. If one entire wall has a sloping ceiling and the entrance door and floor-to-ceiling window are placed on the end walls, such a room fills up very quickly. If possible, I would not plan children’s rooms under 15m² if possible or otherwise create additional space elsewhere. Regarding the bedroom, it’s similar. I also believe that this room is only for sleeping (although in our case there is also a TV as a luxury) and therefore does not need to be larger than necessary. Still, your just under 14m² can also become tight depending on how doors and windows are planned. We have a 3m-wide standard wardrobe (which is already at its capacity limit), but a 2m-wide bed including a 10cm-wide frame all around. Since the bedside cabinets are also quite wide at 60cm, there is an additional 3.4m of bed space along with the 3m wardrobe space. During the apartment search, I was quite surprised at how many apartments were unsuitable because the bedroom could not be arranged, and there was even an 18m² room among them. You really have to be careful, especially if you are already bringing furniture. In addition, I want to be able to reach everything comfortably. If I have to snake through between the wardrobe and the bed or the hallway is pitch dark because cupboards are standing around as storage space, then you don’t feel comfortable in your own home either. Today, people wish for everything to be spacious and open, but you need space for that and it takes away wall space for furniture. For this, you need alternatives, which become difficult in a very tightly designed house. If the office ends up being used as a storage room, then the space ultimately does not bring me anything, and nothing is worse than feeling cramped in your own house. I would rather build 20-40m² larger and give up extras like a fireplace, garden pond, perhaps even electric shutters. You can all retrofit later, but adding on later is really expensive.

Thank you for the input so far!

In the meantime, after much research and a (private) conversation with an architect, another idea has come up:

The property is slightly on a slope. For this reason, I have been advised to build with a basement (alternative: filling up, compacting, supporting).
Why not use half of this basement as living space (which then transitions at ground level into the garden, and towards the front actually as a basement) and above as a kind of bungalow with maybe 120 sqm of living space.
Maybe it’s better if I open a thread in the topic "Planning/Idea Generation."

What is certain is that it will be tight for the desired 130 sqm of living space if technical/utility rooms and the like also need to be accommodated there. Whether an extended garage would be sufficient for that (and for everything else usually stored in a basement) still has to be considered.

1.5 to 2 floors plus basement and garage could again be tight with the budget of €300,000.

Therefore, the idea instead:
- Bungalow (maybe 110-120 sqm: living/dining, kitchen, bedroom, 1 children's room, bathroom)
- plus basement (half as living space: "spare" children's room, work/guest room, guest bathroom, utility room, technical equipment in the basement part)

The plot is slightly on a slope. Therefore, I was advised to build with a basement (Alternative: filling up, compacting, supporting)

I would have advised you the same.

1.5 to 2 stories plus basement and garage could be tight with the budget of €300,000.

Tight is good ... with your expectations _and_ slope location. Rhineland greetings

What ideas? In terms of space?

What kind of ideas? Regarding the space?

You have already realized that your space program doesn’t quite add up. Therefore, 130 sqm is still not that little; properly arranged it’s a little gem ;) No – I meant rather your other requirements: "including KFW55, we want electric shutters, large tiles and parquet in living/sleeping rooms, well-equipped kitchen like garage including storage room". That is already very ambitious on a flat plot; on a sloped site, nearly impossible when assigned to a general contractor/contractor in Bavaria ;) Ask your contacts and request binding price information. If anything, you will only manage it this way – and if your contacts are reliable – to not exceed your budget. Rhineland regards

300k€ should be more than enough. But don't overpay for the land. Once the house is built, there isn't much left, so with 800m2 you probably already have double the size behind the house.