For the metal sector, planning in mm is very inaccurate. We had a hard time back then accepting that blurriness in the centimeter range is normal.
In winter, there is a lack of light in the house and in the living area, light will be necessary almost all day.
You lack about 6 months of natural light in the house,
the south terrace is too warm for 2 months
and the man cave also goes differently. Mine still wanted a cherry picker inside.