Got the answer: one of the cables was suspected to be damaged by termite treatment so they cut and took out the cables to check.

2. Connection pipes ready for point-of-entry water filter

3. The floor of the front extension is tiled


A wooden stick - remnants of the temporary wood structure that the worker stood on. I hope they remove it before they paint the wall.
Back extension - top of the wall still not rendered . Wonder what they are waiting for...a longer ladder?