First bungalow, later two-storey

Hello everyone,

I have the following question:

I own a plot of land and am currently alone.
A large house would be too big for me alone; is there the possibility to first build the ground floor (similar to a bungalow) and add the upper floor including the roof in a few years? Which type of roof would be sensible in this case? Is it possible to build a flat roof that can be removed when adding the upper floor?

I am allowed to build a two-story building overall, but for me alone it would not be worthwhile and is also not financially feasible.

Thank you very much

I would suspect that most likely a small gable roof house would work – everything within the thermal envelope, everything ventilated, everything heated but not finished (e.g., no drywall, no sanitary fixtures, no paint, no flooring)

Thank you for the quick response.

This gable roof would initially be quite expensive.
Is it possible to build a flat roof at the beginning? So one with 0 degree slope, and later "remove" it to add another storey?

I have attached the building regulations.

A pitched roof is not more expensive than a flat roof... the interior finishing of course is. But everything else is difficult... even if you install a filigree ceiling and seal it.. you have the problem that you can't create a slope on it and you have to insulate it from above - retrofitting pipes, stairs, etc. is not trivial. If you make a wooden roof as a finish, you also have to insulate and seal it. Same problem with the pipes. In the end, I don't think it will be significantly cheaper than a small pitched roof house without a knee wall.

I don't want to go out on a limb, but I think flat roofs never have 0 degrees slope. (Wikipedia says in Germany by definition up to 5° slope). However, I believe there are different ways to create the slope. You can probably also achieve this with calculated and specially manufactured external insulation boards. So the concrete slab underneath is executed flat.

Good morning,

it is pointless to discuss FD and their gradient (btw. is right, an FD is never flat), because in the TE's construction area only SD up to a maximum of 45° are allowed ;)

Rhenish greetings