What is the cost of a side entrance door including installation?

Thank you very much first of all. However, I just realized that I expressed myself a little incorrectly or gave too little information. The door in question is an access door to a garage, which is connected to the residential building but has no direct connection inside. To my knowledge, the energy saving ordinance would then be negligible.

The problem is, I do not want to install or dismantle the door myself but want to have it done by a craftsman.

The door is an access door to a garage, which is connected to the residential building but has no direct connection inside. To my knowledge, the energy saving ordinance would then be negligible.

Then I can't find anything technically outdated about an old aluminum door. Is appearance your reason for replacement? - then I would simply consider a wrap...

I would request a quote from the well-known manufacturers. Teckentrup as well as Hörmann offer this.

As an example, I mention here for the professional door installation (Teckentrup RC3/T30) 4-500.- Fr., and with the price difference that you have in Germany compared to us, in my estimation the installation of a side entrance door should be doable for 250 €ur. Without the door, of course!