请教自己装修过房子的朋友, especially兔宝宝 ( r0 L: G4 I4 a' d8 [/ |6 y7 EI 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?' @0 J3 D5 \4 E- ~; e+ y8 S: z