Concrete canopy on existing building

Thank you for your response. Steel is simply out of the question for cost reasons. I had already requested it and, for the desired dimensions, it was over 5000 euros. I can make this construction with wood and concrete myself, and it will cost me approximately 1000 euros in total.

The side panel will later measure 75 cm in width and 2.30 meters in height.
The lid will be 1.40 m wide and 2 meters long. At the front side, a glass pane will be installed between the vertical wall and the house wall, meaning that neither wind nor rain will reach the area.

But still, thank you for your quite justified comment regarding the material.

It will only really be stable if you also anchor the wall to the house. It will probably hold up even like this.

It only really becomes stable if you anchor the wall to the house.
It will probably hold even without that.

It will still gain strength because the lid rests on it, and the lid is anchored to the wall. That means it gains additional stability from that.

The question is just how I can properly connect it to the ground and whether I need to consider anything special when doing so.

How will you anchor the whole thing to the house?

I also did a little designing yesterday.
The whole thing will be built from structural timber and screwed to the house (8 pcs. M16 threaded rods into the load-bearing masonry).
And under the wall there will be a foundation where the wall is fastened with the help of threaded rods and can thus be adjusted in height or in terms of counterpressure.

The whole thing will be clad with OSB boards.
Then the plasterer will cover the whole thing with a thin insulation board and plaster it white.

It will be similar for me as well, except that the side panel is not connected to the house wall and not built in. The wooden cover will then be placed on from above and also anchored to the house wall with threaded rods. To absorb the tensile forces, welded flat bars are pushed through the house wall and anchored on the inside. This still works very well for us because our staircase is still under construction. With the rods through the masonry, the compressive load is taken at the outermost point and snow no longer affects the roof.