
The house has 4 bedrooms, but 1 bathroom, 1 toilet. The original plan layout is attached.
I am looking into adding another toilet WC.

The current laundry room is small with cupboard hanging on top (see photo).
Therefore, I am thinking to add the WC at the blue marker area by collapsing the existing cup board

I am looking for suggestion from the forum for better idea (in terms of cost-effective if closer to the waste system or better house value).
Thank you very much for reading.