Chanwanich building is a 30-year building situated at Silom Road where is a center of business district in Bangkok. At the beginning the owner has an own land and keep expanding by collecting small buildings around their land until became their empire now a day. The brief is to gather all the area as one unite corporate office. We have started by combining all small building facing on the main road as one building by having a new design language as new facade to welcome outsider from the Silom Rd. (main road). With our design study we came up with 2 options of facade design which will reflect to the co-working space building behind the main building where you will be lead by landscape design along the way. The facade design has reflected how organization position by having stone as our core solid material together with new pattern of poly-carbonate sheet where the pattern will allow the lighting work perfectly at night. The mood and tone of the building will change from day to night and create the ambient for people around this area.