Hi everyone! Just wanted to recommend Teng Hong Renovate. I renovated my BTO 4-room flat last year with them. It is a small family run business and the owner is very down to earth and easygoing. Pricing wise is very competitive too. I did not engage an ID, so I told Mr Low (the contractor) what I want to do with my place and he advised us accordingly whether it is doable or not.
Here's some photos of my humble abode. I demolished the wall between the kitchen and dining area, and the wall between my living room and bedroom 3 for a bigger space. I really love the outcome of the renovation! Highly recommend Mr Low!
You can contact them via their facebook page and they will give you a quotation. Hope this helps!