Semi-detached house feasibility assessment ideas notes

You can't fit a 2m double bed in my room. And it fit my budget (well, sort of...) and before the argument comes... if there was a partner, they would also fit at the kitchen table, in the bed, and on the sofa... and mathematically, we would then be at 25m² per person...

And as an absolute non-basement supporter, I'll throw this one back into the ring. Try drawing a ground floor without this mini-HT room, where the 6-pack of beer no longer fits, and plan upstairs with one less room. With 3 children, the study can still go downstairs or the oldest wants his peace and the light well is enough for him. Tools, inflatable boat, decorations, clothes, etc. can be stored there. Laundry, pantry, storage room

Is the building envelope completely used up with 10 x 6.5 for one half?

Probability of twins: 1.2%. So I wouldn’t consider them when planning the house.

With a floor area ratio of 0.2 and 327 m2, max. depth = 10.0 m, that is exactly 6.53. So 6.50 m building volume plus 3 cm air gap. Whether the building envelope then also allows this maximum dimension?