Did anyone knows whats the standard price (or range of price) for building a wall about 4.6 m in length? My future house is using an open concept (nothing separates the kitchen and living room), so thats why a wall is needed.

And what kind of "options" available for such wall (materials, design) ?

i was thinking of a wooden partition or even a piece of curtain if want to save cost.
Modern instead of normal cut off by walls.

actually, to get a quotation from few legitimate contractors is always a smart thing to do, but, i personally prefer small scale contractor, with lesser staff due to cheaper cost and of course, expect a slower job. But, normally, this small scale contractor will perform the work in better state, compare with those big scale type which normally employ indonesian for the jobs.

Evntually, we as a consumers, will need to know how the cost of the works are being calculated, instead of comparing the big sum of quotations btw few contractors. Here, i will come out with some calculation works based on my experiences -

1. wall - 2.5 m * 4.5 m = app rm 750 (without paint)
2. plaster ceiling - 2 * 2 sqf = rm 1.90 ( just the plain and with cornish )
3. concrete table top - 1 foot long = rm 120 to rm 160 ( this include hacking and also using 2 * 2 ft tiles, no matter it is xny, china made or white horse )
4. kitchen cabinet & build in wardrobe - 1 foot long = rm 250 to rm 300 ( depends on the materials, but the price should be within the rage )
5. floor tiles - 1 sqf = rm 3.50 to rm 4.00

for those who want to renovate, advised to do fast before any price hike happened again which might be after christmas.

For me, I would say installation of curtain railings can be done ownself with the right tools.
Fans and lightings too if it's only "pluck and play" unless you need to do wiring.
Thus I've got no comments on the price.