Floor plan: New construction on existing bungalow basement, 1.5-story

On the ground floor, I would change the bedroom and bathroom like this. Who wants the bed under the window?

Hi, I would omit the fireplace. You save the breakthrough in the roof. The future development regarding limits for fine dust would be too uncertain for me. Put the balcony in front of the facade. That provides better thermal separation. It could be retrofitted later. For the long dormer, an asymmetrical gable roof could also be considered. The roof peak might then be overdue.

Several hours of joint development of ideas with the architect using pen and scratch paper.

I stubbornly claim that this is how you recognize a professional.

Also very commendable is the garage that is not forced onto the house. I would still keep the construction method open. The attic is unnecessary, and the balcony, if anything, is a good idea. As always, I can only agree with the suggestion to do without a fireplace. Remove the divisibility into a two-family house from the wish list; that relaxes it in the right place.

I would omit the fireplace. [...] The future development regarding limits for fine dust would be too uncertain for me.

We see the development similarly, but interestingly come to the opposite conclusion: Before new fireplaces are banned due to fine dust limits, we will still build ours now, hoping that existing fireplaces will be allowed to be fired a little longer. Possibly a naive thought...

Place the balcony in front of the facade. That provides better thermal separation. It could be retrofitted later. For the long dormer, one could also consider an asymmetrical gable roof. The roof ridge might then perhaps be overdue.

We included the balcony also for that reason, to achieve sufficient depth (cantilevered, without supports). An asymmetrical gable roof is an interesting option; we need to have it shown to us once in sections/elevations. Visually it might be too "modern" for us, but through the one-sided dormer, we already basically have an asymmetrical roof.

I would still keep the construction method open.

What we can imagine is a kind of hybrid construction method:

[*]Exterior walls: aerated concrete, monolithic [*]Ground floor interior walls: sand-lime brick [*]Ground floor ceiling: concrete [*]Upper floor interior walls: timber frame (flexibility for remodeling) [*]Upper floor ceiling: wooden beams

However, we will need to consult again here (especially with a structural engineer & energy consultant).

Remove the divisibility into a two-family house from the wishlist, that relaxes things in the right place.

The higher KfW subsidy for the two-family house has maneuvered us in this direction in terms of planning. I basically find it sensible to already think ahead for "tomorrow," even if everything can and will turn out differently (but that somehow applies to every planning, even those with a shorter time horizon).

What we can imagine is a kind of hybrid construction method:

[*]Exterior walls: aerated concrete, monolithic [*]Ground floor interior walls: sand-lime brick

The manufacturer can also "imagine" this and has both building materials in their program.

The higher KfW subsidy for the two-family house has maneuvered us in this direction in terms of planning. I basically find it sensible to think ahead for "tomorrow," even if everything can and will turn out differently (but that somehow applies to every planning, even those with a shorter time horizon).

Subsidy-optimized product design usually only pays off for large housing developers. For the owner-builder, the additional subsidy compensates for the extra costs, even if the romantic expectation horizon probably flies higher ;-)

We see the development similarly, but interestingly come to the opposite conclusion: before new chimneys are banned due to fine dust limits, we'll still build ours now in the hope that existing chimneys will be allowed to be used a little longer. Possibly a naive thought...

I will leave that "explicitly uncommented" ...

I would plan something like that. In my opinion, the roof frame can be completely reused. These are all prefabricated elements.