ᐅ Construction defects – Condominium – Is a price reduction possible? How much?

The situation is as follows:

* Purchase and construction of a new 4-room approximately 90 sqm (970 sq ft) condominium from a developer
* Construction went quite well, and communication with the developer was good
* For example, completion was delayed by 8 weeks; the developer communicated this 6 months in advance and was willing without any issues to accept a price reduction equivalent to 2 months’ rent, etc.
* All local tradesmen were used, some of whom I had already hired for my own house
* The developer is a well-known local company, actively involved in clubs (also personally), with a good reputation, considered a “Mercedes” brand, so somewhat more expensive, which I was aware of and willing to pay for

At handover, the following defects were noted:

1) Some sockets in the hallway and storage room are not on the circuit breaker for the hallway/storage room but instead on the living room’s circuit breaker. I have checked the situation and I am 100% sure that this cannot be fixed without major work. Breaking up the floor or walls to fix this is out of the question for me. The electrician’s assessment is still pending (he is currently on vacation), but I am confident it cannot be resolved.

2) The building specification states “underfloor heating with a thermostat in every room” (I don't remember the exact wording). Now we have discovered that the guest WC does not have a separate underfloor heating system but shares it with the hallway.

Both points are included in the handover report, and the site manager who carried out the handover did not object strongly. We agreed that I would discuss the next steps with his supervisor.

Neither issue is a major problem, but I do not want to accept everything without question. Plus, what is stated in the building specification should be delivered.

I am not keen on insisting on correction of these defects, as both would require major work. Also, the tenant might move in later or reduce rent, adding more stress. I assume the developer sees it similarly, as they want their final payment and then to be done.

Can I expect that these two points will lead to a reduction in the purchase price?
How much could such a reduction reasonably be?

Or is it absolutely necessary to involve an independent expert? I am reluctant to do that as it means additional time, effort, cost, and surely stress with the developer. So far, the developer has been cooperative. Therefore, I assume they will agree to a price reduction.

What do the experts say?