This chapter shall not apply to any existing or proposed building or extension thereof used or to be used by a public utility corporation if, upon petition of such corporation, the Pennsylvania Utility Commission shall, after a public hearing, decide that the present or proposed situation of the building in question is reasonably necessary for the convenience or welfare of the public; nor shall this chapter apply to any building of the Township or extension thereof or to the use of any premises by the Township if the Township Council shall, after a public hearing, decide that such building or extension thereof or such use of any premises is reasonably necessary for the convenience or welfare of the public, provided that any municipal recreational building or use may be established by the Township Council at any location in the Township without holding such public hearing.