Hi Namja, Carpenters usually quote by PFR (per foot run). Several factors contribute to the PFR pricing: - height - whether you have sliding doors - doors with glass - etc. For HDB , the full height is usually about 2.6meters. Therefore the cost for a full height wardrobe that spans 6 feet width would be calculated as such: 6 x $300 pfr (not psf as mentioned by benetay) = $1,800 The market rate really differs between IDs (Interior Designers) to sub-contractors (eg. carpentry workshops). ID firms generally perform a higher mark-up as they engage sub-contractors to construct the wood-work items. I went direct to a carpentry workshop to get mine done previously and I believe I enjoyed cost savings of at least 20-30%. Hope this helps. Cheers!