53 Pa. Stat. § 10405
For the purpose of preserving the integrity of the official map of the municipality, no permit shall be issued for any building within the lines of any street, watercourse or public ground shown or laid out on the official map. No person shall recover any damages for the taking for public use of any building or improvements constructed within the lines of any street, watercourse or public ground after the same shall have been included in the official map, and any such building or improvement shall be removed at the expense of the owner. However, when the property of which the reserved location forms a part, cannot yield a reasonable return to the owner unless a permit shall be granted, the owner may apply to the governing body for the grant of a special encroachment permit to build. Before granting any special encroachment permit authorized in this section, the governing body may submit the application for a special encroachment permit to the local planning agency and allow the planning agency 30 days for review and comment and shall give public notice and hold a public hearing at which all parties in interest shall have an opportunity to be heard. A refusal by the governing body to grant the special encroachment permit applied for may be appealed by the applicant to the zoning hearing board in the same manner, and within the same time limitation, as is provided in Article IX.
53 P.S. § 10405