请教自己装修过房子的朋友, especially兔宝宝 2 w' `& c. z7 f3 l# {I 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? ]: c% s; T" L: _ * x2 l, G ^1 h7 L( X# cThanks.