Price difference between brick and calcium silicate stone with ETICS

I also see a defensive offer here: the contractor wants to steer the client towards the wall construction that is more favorable for the contractor by means of the price argument. One must not forget: the wall construction is emotionally irrelevant to the contractor; it is only a means to an end for him to create enclosed spaces. Simply put, his business is the trade of bricks and mason hours – if client dreams fit into the spaces between the walls, then that only adds the client as a participant to his business; emotionally it means nothing to him.

A contractor will currently always strive to have both a monolithic and an ETICS wall construction in his portfolio. If customers are divided 60:40 between the variants, everything is fine and he will usually manage to price them roughly equally. However, if customers are divided 90:10, he will achieve less favorable purchasing conditions for the less frequently chosen variant and pass this loss on to the client as a surcharge. With large price differences, I therefore also see an indicator that the contractor will have more routine with the processing of the more cheaply offered building material (and routine is generally an ally when it comes to lower likelihood of construction defects).

I also see a defensive offer here: the builder wants to steer the client towards the wall construction that is more favorable for the builder using the price argument. One must not forget: the builder is emotionally indifferent to the wall construction; for him, it is only a means to an end, to create enclosed space. His business is, simplified, the trade of bricks and masonry hours – if client dreams fit into the spaces between the walls, this only adds the client as a participant to his business; emotionally, it means nothing to him.

A builder will currently always strive to have both a monolithic and an ETICS wall construction in his portfolio. If customers are split 60:40 between the variants, everything is fine and he will usually manage to price them almost equally. However, if customers are distributed 90:10, he will achieve less favorable purchasing conditions for the less frequently chosen variant and pass this loss on to the client as a surcharge. With large price differences, I also see this as an indicator that the builder will have more routine in processing the more cheaply offered building material (and routine is, on balance, usually a friend when it comes to a lower likelihood of building defects).

Thank you for the explanation. Yes, the company usually builds all its houses with calcium silicate bricks. Other stones are also offered but only upon request. I am just surprised at how large the price difference is...

If you do not live in the southern part of the country, where construction is predominantly done with Poroton, building monolithically is several thousand more expensive. That is correct. In the north, aerated concrete is more commonly used.

Whether it has to be 8K€ for a 135sqm house is of course questionable. Take it or leave it.

I am just surprised how large the price difference is...

See my explanation: 1. the difference is as large as the delta between "customer demand for variant X" and "customer demand for variant Y"; and 2. the difference between the processor's routine with variants X and Y will be just as large. For you, this practically means: a) if you don't care or if you prefer the cheaper offered variant, then take this cheaper offered variant; b) if you would prefer the other variant, then take another contractor who handles it more routinely.