请教自己装修过房子的朋友, especially兔宝宝 : [; E1 j6 A& L: Y- T. PI 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? 2 q6 R( O! x- L# L" l * T2 ^1 C) t U$ X' s* r5 RThanks.