Party A of the project asked to increase the area and add a balcony, which was said verbally at the

If the other party still does not admit it at the time of the lawsuit, you can apply to the court to entrust a third-party appraisal agency to appraise it, as long as there is a change or increase, regardless of whether he admits to the increase, he will generally have to pay money.

Engineering changes must not be gullible verbal promises, must be written documents or instructions, next time pay attention!

Then you have to find a witness to prove that he said this, or there is a recording to prove that she asked for this, otherwise it is very difficult, the so-called empty words, that's it. Or you have been to the scene many times with the balcony and have not raised objections.

That's all there is to it.