Sue the developer for repairing the house. If he refuses to implement it, can he add a lawsuit to share the property fee?

I don't know what is wrong with your house. If the house is not suitable for living, you can refuse to pay the property fee.

In addition, enforcement is only aimed at the part of the court decision and cannot be added.

If the house is habitable, but you think that the maintenance of the house has not been carried out, so the property fee should not be paid, you can apply to the court for re-litigation. If there is a second trial, additional claims can also be made in the second trial, but in general, additional claims are not accepted in the second trial.