I was quoted 6.5k by my contractor for a very simple extension of backyard. I personally felt it is on the high side and would like to seek some opinion.

Location: Kepong
Local council: DBKL
Property: Single storey terrace

Wet work involve extension of a small backyard (11'x6'), change of roof truss (use back same roof design) and hacking of one interior wall. The rest are untouched.

Contractor also told me deposit is not refundable. Other contractor quote the price around 5k for submission.

Would like to know the actual cost before I confront him.