16 Pa. Stat. § 5206
It may make recommendations to the county commissioners from time to time concerning any such matters and things aforesaid for action of the county commissioners thereon, and in so doing have regard for present conditions and future needs and growth of the county, and the distribution and relative location of all the principal streets and railways, waterways and all other means of public travel and business communication, as well as the distribution and relative location of public buildings, public grounds and open spaces devoted to public use, and the planning and laying out for dwelling and business purposes of private grounds brought into the market from time to time.
The County Planning Commission may make recommendations to any public authorities or any corporations or individuals in such counties with reference to the location of any buildings, structures or works to be erected or constructed by them.
16 P.S. § 5206