11 Pa.C.S. § 12930
(b) Improvement.— A city may provide for the following improvements of any street, in length, in the space between the curb, gutter or cartway and the property line:
(5) Changing, altering, renewing, replanting, pruning or otherwise making improvements in an item listed under paragraph (1), (2), (3) or (4).
Cross References. Section 12930 is referred to in section 12931 of this title.