... I definitely don’t want that, but I’d like to go to my architect with some reasonable ideas and save him some work...
Why save him work when he charges thousands of euros for it? With his knowledge, he has many more possibilities than you can even dream of because you don’t have that knowledge at hand.
I can’t condemn anyone who makes drawings just for the fun of it. I did the same, but I have also spent half of my life dealing with floor plans. It’s stupid when the architect ultimately takes over your design with its mistakes (it’s easy money for him), but if he is a good one, he would certainly have far more ideas that are tailored to you. You then run the risk of having a dilettantishly designed house built.
Guidelines are:
to study the plot and the development plan very carefully,
to clarify the building shape and style,
to include sun positions, windows, views, and existing structures in the neighborhood,
to include lifestyle habits (warning: these can change quickly),
to create a basic scheme.
Place stairs,
find rooms,
combine drainage and plan it on the outer walls,
stack walls on top of each other (for structural reasons), although wood-frame/drywall is often used in the upper floor due to lightness,
proximity of bathroom and bedrooms, guest room and WC, stairs outside the dirty area entrance, sufficient wardrobe, proximity of kitchen, utility room/storage to the entrance, enough space for freezer, space requirements of different stair types, possibilities to place cabinets, sufficient window area 12%-15% of the room area, avoidance of unnecessary walls and corners, standard dimensions of doors and other fixtures, functional kitchen, possible accessibility (movement area of 150 cm), easily accessible storage space for tools, garbage, cleaning supplies, drinks, food, sports equipment, children’s items, etc., exits from the house to the garden, few projections/bays/corners/ledges/balconies/flat roofs that require special sealing.
But: with the first 5 lines of this list just go to the architect.
Economical alternative: look for a builder with model houses.
But there it may be that there are few to almost no possibilities to change floor plans because the statics then have to be recalculated.
And what do you do then with your design into which you have put so much heart—and possibly furnished digitally in color?
Just asking... If you really don’t like the architect’s design at all (after all, there are certainly some boring architects), how do you proceed (planning-wise and cost-wise)?
Then he should draw you a better one. Everything is regulated according to HOAI.
Regards, Yvonne