most probably your contractor using bakau pile and an A frame rig. Else use traditional method with 2 workers jumping on it. I would be more concerned with 1a - 4 as that has double storey. my usual concern is if using bakau and water table is low, it rots easily without water. Expect to have cracks on walls as secondary settlement occurs. Best you take picture of your neighbour's walls (their side) before commencing work to avoid future dispute since you promised to fix damage. FF to 6 is cantilever so most piling would occur at FF.

Edit: if using bakau make sure at least min 3" uniform throughout length. nowadays hard to find 4"

This post has been edited by CRaider2: Jul 30 2020, 12:00 AM