请教自己装修过房子的朋友, especially兔宝宝 8 D/ t9 W4 g! UI 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? " f, N% F7 p! p# e {, l' m" u/ Q& f* E7 K' p. _Thanks.