Construction costs are currently skyrocketing

The thing with the photovoltaic obligation – if it ever comes – will be just like all the other obligations. French balcony and all the other stuff that comes with it. Either you do it or you don’t. As long as I pay for the whole circus, I also decide what has to be and what doesn’t. And that photovoltaic pays off is probably wishful thinking at the current prices. The money should rather be invested in really good insulation because that definitely pays off. I have already seen numerous new buildings without exterior insulation but with photovoltaic on the roof. I can’t understand that.

Just because your offer wouldn't have paid off doesn't mean that applies to everyone. But yes, currently finding a decent offer is not so easy. Fortunately, ours from this year definitely is. Depending on the crystal ball, prices will normalize again. Maybe we can agree on one of the statements "The photovoltaic system is probably the only trade that most likely/at all/to some extent pays for itself"? ;)

As a Franconian, pardon Bavarian, I find it utterly ridiculous that the development plan still prescribes roof shape and tile color, but neither photovoltaic system nor cistern.

We can gladly agree on the former. Regarding the latter, I share your opinion, but probably with different conclusions: tile color and roof shape can be taken out of the development plan. Photovoltaic systems and cisterns have no place in it either. There is far too much regulation in Germany. I'm glad we don't have a development plan.

New buildings without external insulation

Then probably in monolithic construction, which is also insulated, just without an external insulation layer. Surely no one builds without complying with the energy saving ordinance.

Thank you for your feedback. It was very helpful. It looks like we are actually average. Unfortunately, we missed BAFA...

Our price is gross all in, however (still) without enthalpy heat exchanger. In total a little over 170m2 living space, 520m3 air volume, 13 valves (6x exhaust air, 5x supply air), central control unit...
...and the craftsman seems very down-to-earth and honest :)

We have just under 200m of DN75 pipes in the raw ceiling, with 12 exhaust and supply air valves. Does not include nerves and cold. Up to December 2021, material cost around €1000 in EL. I calculate a total of 6k all in for 170m2 with self-labor.

And the fact that photovoltaics pay off is rather wishful thinking at the current prices. It is better to invest the money in a really good insulation because that definitely pays off. I have already seen several new buildings without external insulation but with photovoltaics on the roof. I cannot understand that.

We only have external insulation at the base and at points where the structural engineer did not want to allow a normal lintel over the wide windows (3m and 3.5m wide) and demanded reinforced concrete. Otherwise, Ytong bricks are completely sufficient for a 40cm building envelope. Financially worthwhile, however, only because the KfW still grants us a lot of money. With saved heating costs of 50-100€ per year, it does not pay off.

Then probably in monolithic construction, which is also insulated, just without an external insulation layer. Surely no one is building without complying with the Energy Saving Ordinance.

So the ones I have seen were quite normal brick buildings with 36 cm bricks and mortar. I doubt that they comply with the Energy Saving Ordinance.