Confused about renovation process and contractor pricing in Singapore

[abbby]

We usually get a formal quotation for the proposed works ie: Painting whole unit, add shelves in living room, remove built in cabinet etc. And lists a summarised itemised item to be done and cost with the grand cost at the bottom.

Importantly, good to get at least 2 quotes to compare, just to make sure you're not ripped off.

[wei_liang]

Abby's right about getting at least 2 quotes. I'd actually say get 3 if you can because sometimes one contractor is just having a slow month and quotes low, and another is busy and quotes high, so the middle one gives you the most realistic picture of what the work actually costs.
The itemised quotation is important — don't accept anything that just says "renovation works - $X,000" as a lump sum. You want to see exactly what you're paying for because that's also how you hold them accountable later. If shelves are listed and they don't put them up, you have something to point to.
One thing I'd add is to ask what's NOT included in the quote. Materials, disposal fees, hacking works — these are the things that quietly get added on later if you don't ask upfront. A good contractor will tell you clearly. A problematic one gets vague.
Also when comparing quotes don't just look at the final number. Check if they're using the same materials and specs. Sometimes one quote looks cheaper because they've swapped to lower grade materials without telling you.