Working more than contractually agreed

Hi,

What if the house builder with whom a contract was signed suddenly does more than what is stated in the contract?
For example: instead of one heater, suddenly four.
In the signed plans, there is only one heater.

I’m happy about the extra heaters, but do I have to pay for them if I say nothing? Do I have to say that too much was done?

I mean, it’s their problem, since a contract with all plans and work has been signed.
What do you think?

Hello,

What if the house builder, with whom a contract was signed, suddenly does more than what is stated in the contract? For example: instead of one heating system suddenly 4. Only 1 heating system is in the signed plans.

You probably mean radiators?

I am happy about the extra heating, but do I have to pay for it if I say nothing? Do I have to say that too much was done? I mean, it is their problem since a contract with all plans and work is signed. What do you think?

If push comes to shove, you will probably have to bear part of the blame if you do not point out the "extra" to your contractor.

Kind regards

Uhm yes sure my radiators.

Hmm difficult. From when should I point it out to him?

...From when should I inform him about it?

Immediately, _without_ delay?
Kind regards