you can acquire a minimum of 2,000 sqm to literally take the term "detached" house
Even though 2,000 sqm seems very large compared to many new development plots, it is by no means what one imagines under "solitary location" or even just "yard." We have 1,800 sqm and yes – you have a nice, large garden. But it remains a normal garden.
Our neighbor has about 4,000 sqm, which is a small (!) yard where his tractor also parks, with a barn, etc. But in the end, he is quite close to the neighbor when he is sitting outside, and his property fits quite normally into the streetscape, it is not isolated.
"Solitary location" (and with 's background, i.e. genuinely solitary location) certainly requires, with a nice wall and hedge around it, according to these estimates closer to 10,000 sqm. Or else the outer area.