The present invention is a remodeling method differentiated from the existing construction companies, so that the existing internal structures are not removed and used efficiently. Female It is possible to remodel the apartment house without relocating the tenant, and through this, the effect of increasing the floor area ratio can be enjoyed. This is shortened as much as possible, and the remodeling can be completed within one year, and the construction cost is minimized. Compared to the construction cost, it is about a residential apartment remodeling method to enjoy 50~60% savings.
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