House built in 1914 is to get a new heating system

I just checked the current prices for district heating in my place of residence. The kWh costs 9.551 ct. On the internet, pellets are assumed to cost 5.9 ct/kWh. That is quite a significant difference

That is true for the pure consumption costs. Keep in mind that you only have one pipe in the wall for that. You don’t need any investments for a pellet boiler, exhaust system, or costs for maintenance and chimney sweep. And you need your own basement room to store the pellets.

If you only have a low heat demand, then the consumption costs are lower or similar to the operating costs including depreciation.

If you are going to renovate the attic anyway, you will have scaffolding. Why don’t you insulate the facade at the same time, possibly even as a DIY project? Then only the basement ceiling would be missing. Discuss this as suggested with an energy consultant.

At the moment I still hesitate to consult the energy advisor because I feel that they all simply always recommend the maximum amount of insulation and then want 5000€ for it.

No, that is not the case. Even 50% of the costs Kosten für den Energieberater can be subsidized. And that does not cost thousands, but rather hundreds of euros.

Was "accidentally" at Ökofen in Mickhausen today. It was about a pellet solution for an old farm. I found the concept, product, and company convincing. Have a look there or drop by.

Thank you for the info, I will talk to an energy consultant. I will take a look at the company, thanks for the tip.