Which companies build affordable expansion houses?

Hey since I have a relatively low budget, I am really trying to consider all possibilities. One of my ideas: prefabricated house kits as shell houses are usually relatively cheap to get. If you order a kit and hire an external company (often kits are also offered as turnkey..) the price could definitely be somewhat lower, right? Has anyone done that before? Does anyone know companies in the Berlin area that do something like that?

Lego

SCNR

Rhenish greetings from the road
Building expert

Thank you for this helpful answer^^

With a limited budget, as in our case, I rather recommend a used house. When building, many unpleasant expensive surprises can arise. When buying used with an expert, you generally have more security and may pay only about half compared to building, depending on the house.

yes, the used houses in my area are currently all priced quite high. But I have only been looking intensively for about 3 months. Maybe I just need a lot more patience and a bit of luck to be able to strike when I find a good offer

3 months is a short time. For something like this, one usually calculates in years.