Building Act Article 25

Without review made by and the building permit issued by the municipal or county (city) (bureau) competent authority of construction, anyone may not construct, use or demolition any building, unless otherwise enacted in Articles 78 and 98.To dispose a building constructed, used or demolition without permission, the municipal or county (city) (bureau) competent authority of construction may designate persons to enter the public or private-owned land or building with certificates for inspection.
中文原文 建築法第25條
建築物非經申請直轄市、縣(市)(局)主管建築機關之審查許可並發給執照,不得擅自建造或使用或拆除。
但合於第七十八條及第九十八條規定者,不在此限。
直轄市、縣(市)(局)主管建築機關為處理擅自建造或使用或拆除之建築物,得派員攜帶證明文件,進入公私有土地或建築物內勘查。

English translation for reference only; the Chinese text prevails. Not legal advice.