Bungalow floor plan for 3 persons, 130 sqm, please opinions...

thanks for the feedback. Yes, the cervical spine still worries me a bit. We would still plan an attic storage room during the roof conversion. The house is supplied by district heating, so the technology remains minimal. Possibly a buffer tank needs to be accommodated, otherwise "only" water, electricity, media. I’m attaching the current plan. We are at 135 sqm living space and would do the roof conversion ourselves.

do you have a reinforced concrete ceiling?

a consideration in view of

Plot size 900 sqm
... floor area ratio 0.4

and

We are at 135 sqm living space

Would it perhaps be sensible to design the floor plan also with "expandability" in mind?
so that you could reasonably add two or three rooms (or a "retirement cottage") next to it in case of need in 10 or 30 years?

do you have a reinforced concrete ceiling?

No. It is made of wood with Knauf insulation inside, boards on top to walk on, drywall below as the ceiling. Why would a bungalow need a concrete ceiling?

No. It is made of wood with knob insulation inside, boards on top for walking, and drywall below as the ceiling. Why does a bungalow need a concrete ceiling?

I was just wondering because of the possible extension and the load-bearing capacity….

That holds. Look at the crossbars.