Installation over inspection shaft / lay inspection shaft

Hello,
we are considering building an extension. However, at the moment, the inspection shaft including the drainage pump is located under the current terrace. Now the very basic question: Is it realistic to move this shaft several meters to the side and what would that cost? Apart from dismantling the terrace, so really just the relocation of the shaft and possibly repositioning the pipes.
We are wondering whether we should even pursue the extension further or if the shaft at that location is already a deal-breaker.
What type of trade could answer this question more precisely or is this a question for the city?
Thank you very much and best regards
Frank

Hello Hello

First of all, it is a question of who owns the inspection shaft.
For drainage, I would consider the property owner as the owner.

A local civil engineering contractor can provide you with information about the costs.

Olli