Conversion of the parental home into two areas - enough space on the property?

Hello! We are currently planning the attic conversion in my parents' house! The house will be completely divided into two apartments for this purpose. My parents will live downstairs, where nothing will change. We would expand the 2nd floor (currently about 80m2) with sloping ceilings. In the floor plan that our planner drew, the 2nd floor would amount to about 126m2. Divided into 3 bedrooms, a small hallway, a walk-in closet, bathroom, living/dining area, pantry, and (an extra approx. 20m2 terrace) everything except one bedroom without sloping ceilings. Through a covered outdoor staircase and a windbreak, you would enter directly into the living area (structurally otherwise difficult). The basement could be partially shared with my parents and the carport/garden shed is also available. Do you think this is large enough for a family with (possibly) two children? Best regards Julia

Do you think this is big enough for a family with (possibly) two children?

I find it especially too visually sparse for an outsider who is supposed to follow your thoughts.

What has the planner drawn now?

126 m2 is not a palace but definitely suitable for 4 people. 3 bedrooms, fits. It just might be missing an office, if you don't need one (or if you find space for it in the living area/bedroom), everything is fine... As far as one can say without a plan...