15m2 children's room
20m2 bedroom
High window proportion
230,000 € is perhaps the price of a prefabricated house manufacturer starting from the foundation slab.
Plus additional construction costs and interior fittings without further ado >>300,000
Well, you can't generalize, although this will probably apply to >90% of current projects. You can still build very cheaply today, but some criteria have to be met, otherwise it will be rubbish.
150 sqm usually ends up with additional costs of 320-350k€. This can be reduced by:
- Location advantage (Saxony builds cheaper than Hamburg, for example)
- a lot of own work
- connections
- individual awarding of trades
I assume that pile foundation is not included in the budget, otherwise I also see a bleak outlook.
To squeeze 150 sqm into 230k€, everything has to fit and you have to restrain yourself as much as possible with all equipment. You also have to organize the trades yourself, do as much own work as possible, and hopefully leverage existing contacts. Then it MIGHT be enough. Whether you can implement that and whether it’s worth it to you is something you have to decide. With such a tight budget, even I would get cold feet.
We are currently building too and will end up under 1500€/sqm. But we are doing a lot ourselves or have good contacts:
- ETICS (External Thermal Insulation Composite System) as own work
- floor coverings as own work
- complete electrical work as own work
- plumbing within friends circle
- insulation inside (ceiling and roof) as own work
- drywall as own work
- windows ordered from Poland and installed as own work
- organize the trades myself (only works properly with local companies)
- material as equity
etc. pp.
With 120 sqm the situation would already look a bit better.