The mission of the Engineering Department is to furnish professional expertise to various Township Boards, Commissions, Township Manager, and other departments as necessary in order for those Boards and Departments to fulfill their charge under the Township's Home Rule Charter. Some examples of our advice concern engineering, stormwater management, stormwater runoff, sanitary sewers, flood plain management, and subdivision and land development issues within Radnor Township. The Engineering Department is the liaison to the Planning Commission


June 1, 2023: On Site Sewage Inspections Will Be Performed by the Delaware County Health Department

Starting Thursday, June 1, 2023, Radnor Township will no longer be performing inspections for onsite sewage systems.  All inspections will be performed by the Delaware County Health Department. 

Delaware County Health Department Sewage Program


The Radnor Township Board of Commissioners adopted Ordinance No. 2022-15, Stormwater Management, effective October 13th, 2022.  The Township’s new ordinance is based on the Delaware County “County Wide SWM Ordinance”. Any permit applications received starting October 13th, 2022, will be required to adhere to the new ordinance.

The new ordinance addresses some commonsense concerns and provides more options for property owners to comply with the ordinance. To continue to protect Radnor Township residents now and in the future, in some cases the new ordinance is more stringent than the previous ordinance.

Please find below, links to the new ordinance 2022-15, highlights of the new ordinance, and the Pennsylvania Department of Environmental Best Management Practices Manual [PA DEP BMP Manual].

Stormwater Management Ordinance 2022-15: Ordinance 2022-15

Stormwater  Management Ordinance Highlights: Stormwater Management Ordinance Highlights

 Link to PA DEP BMP Manual:

Grading Permits

Normally all applications for construction projects must apply for a grading permit. This permit is required if the footprint of any impervious surface is being expanded and/or replaced. A grading permit must be approved before a building permit application is accepted by the Community Development Department.

Impervious Surfaces

Impervious surface is any surface that prevents the infiltration of water into the ground. Impervious surfaces include, but are not limited to, streets, sidewalks, pavements, driveway areas, or roofs. Any surface designed to be gravel or crushed stone shall be regarded as impervious surfaces.

Earth moving in any instance also institutes the necessity of a grading permit.

Subdivision and Land Development (SALDO)

All requests for subdivision and land development in Radnor are processed through the Engineering Department and reviewed for compliance with the Township's zoning code and subdivision ordinance by the Community Development, Public Works, and Engineering Departments. Their findings are considered by the Planning Commission, which also evaluates projects' adherence to the comprehensive land use plan. The Board of Commissioners then reviews the recommendations of staff and Planning Commission members before deciding to approve or reject a proposal.

Department Calendar

03/04/2024 6:30 PM - 8:30 PM
04/01/2024 6:30 PM - 8:30 PM
05/06/2024 6:30 PM - 8:30 PM
06/03/2024 6:30 PM - 8:30 PM
07/01/2024 6:30 PM - 8:30 PM
08/05/2024 6:30 PM - 8:30 PM
09/03/2024 6:30 PM - 8:30 PM
10/07/2024 6:30 PM - 8:30 PM
11/04/2024 6:30 PM - 8:30 PM
12/02/2024 6:30 PM - 8:30 PM

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