Korean government has been promoted diverse incentive policies to activate ‘Green Building’ construction. So far, however, the incentive policies are not effective due to their high cost, complicated administrative procedure, low level of benefit and high uncertainties. Particularly, the financial supports are very restrictive although the initial construction cost is much higher compared to general buildings. This research aims to improve existing legal systems to incentivize green buildings. This research analyzes the limitations of green building incentive policies and suggests political improvement strategy focusing on the easement of building regulations and contributed acceptance.