is hard to 'guestimate' if we are not aware of what material is being used... sometimes u can get a similar job done for 100K , or 150K, but both derives different material and quality.

no offence Drian, but did you really check in details all those items in depth? Lighting points , who knows he re-wire the whole house with better quality wires?  Even the downlights, a better built d/l cost $30 a piece as opposed to maybe 10 ringgit one... Built-in wardrobe, a melamine board any plywood won't be the same, same goes to what solid surface(local or samsung makes a huge difference) he has chosen?    Yes, unless we compare apple to apple, hard to tell really if he has paid 100K more premium than the usual..    

btw. The most cut-throat item in my whole reno quotation is the tiles actually...by getting the tiles myself i'm saving at least 40%-50% of the cost quoted from my ID...  Anyhow in general i do agree that by engaging ID it cost more than dealing direct, but when you don't have much time to follow through the entire renovation period , engaging ID is the key and it becomes a necessity.

[attachmentid=1915301]
9 feets wet kitchen $1300 ( i supply 2x2)
relocation of piping $300 
hacking and lay new wall tiles( that portion) $300
* all others mats he bao.

[attachmentid=1915305]
Water proofing 3rd floor balcony, and lay tiles
he supply tiles and mats $450

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Dry kitchen $7800 , without kitchen top(havent decide granite or Corian, if Corian, probably get direct from TSI-MrStuar)

More pix n progress in my camera...above pix from fone

ya..typical ID quotation, charge by Area , only if you scrutinize the quotation then maybe u could get a better BQ..but 100K extra..that's a sum!

Cant see the location, so i guess that price because your fan point is 2 way, so need to have to point for 1 fan, then need to hack a lot, and then need to find tile worker to touch-up the tile. even still a bit expensive, but still able to explain because to so many thing need to be done.