Two-family house 2 full floors generation house + expandable attic

I loved my roll of tracing paper during the planning phase! You can get it for a few euros in most stationery stores. Back then, we scrimped and bought the cheaper (and thinner) paper. Today, I would choose the more expensive roll, but that's just a side note.

You can wonderfully "spin around" with it and don't always have to erase, and after three more ideas you wish you had the original idea back, but with each new plan you simply lay new tracing paper over the base plan.

So I highly recommend a roll of tracing paper.

btw: we have about 130cm slope from the back left to the front right, and that gave us two rooms in the basement with natural light. The rooms could become even more normal living space if we had dug out more at the front and there wasn't a balcony above (but that wasn't necessary for us). Just as a thought-provoking idea on how to make use of such a slope.

Parchment paper roll

I think you mean tracing paper. Parchment is something else as far as I know (e.g. opaque).

Or so - we just call it parchment

Or so - we just call it parchment

Us too. I took the wax paper from the roll and graph paper underneath. However, that was 30 years ago, but it worked wonderfully.

The butter paper is more expensive than the drawing paper because it is coated, but if you already have it at home, it works as well.

I loved my roll of tracing paper during the planning phase!

I think I only switched to the "drawing machine," ink, and the architect's usual tracing paper in eighth grade; before that, and for smaller/detail drawings, I used household sandwich paper on a clipboard. For both, I do not "complain" about the common term "parchment." Wikipedia says, by the way: Today's tracing paper used as a carrier for hand-made technical drawings is also called parchment paper or simply parchment. In the preliminary design stage, I advise having the "courage" to defy perfectionism and to "unprofessionally" scribble with a ballpoint pen on almost any scrap paper. I consciously do not strictly adhere to a scale, although with practice one will eventually settle somewhere around "1 : roughly 250 to 200," and I expressly suggest when scribbling a. not to use a ruler b. not to try to make stroke lengths exact spot landings c. not to use failed line attempts as a reason to crumple paper d. to leave invalid strokes as they are and simply draw their successors slightly thicker if necessary, crossing out segments if needed. If you follow this approach, it is easier to make peace with the apparent inferiority of hand drawing compared to mouse-click drawing.