For the smartest building, more energy, money, material and labour are required to maintain and replace the smart systems every couple of decades to keep it as smart as the original. Under the current fast-changing circumstance, the climate situation in the future will be completely unpredicted, it’s difficult to guarantee that the smart building can be smart enough at that time. In this sense, the smart building is dumb. Also, same to the smart city, it is very complex to manage, and it will be unpredictably vulnerable. For the climate emergency we face now and future, instead of introducing more high techs, we need the courage to use the best of the old ideas. In some Asian and middle eastern countries, traditional local low techs helped our ancestors smartly adapt to hot and dry climate for a long time. Therefore, I believe that dumbness is smart, dumbness is the future of the building. In my project, by designing one possible dumb housing prototype, the traditional low techs can be restored in contemporary society. Since housing is relatable to the general public, it has power to shape an excellent dumb city in the future.