请教自己装修过房子的朋友, especially兔宝宝 ( q' b9 o1 m" JI purchased a 2 storey house with 2100 sqft, partial fininshed basement(1/4 finished), I want to finish the left 3/4 basement plus a full bathroom and a small kichen, do I need some permission? How much I have to pay?8 O3 j, n6 G. z7 l3 E2 G# B
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Thanks.