July 23, 2020 - COVID-19 Service Updates : PWD Headquarters remains closed to the general public - no in-person meetings or document drop offs. Also see information on eCLIPSE Instructions and new virtural Pre-Application Meeting Request Form here.    

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Chapter 2 - Submission, Review, and Approval Procedures

2.6 PWD's Role in Philadelphia's Development Process

2.6 PWD’s Role in Philadelphia’s Development Process

Philadelphia Water Department (PWD) approvals are only one part of the full set of approvals required for development within Philadelphia. PWD approvals are often prerequisites for other approvals or permits. For example, the PWD Post-Construction Stormwater Management Plan (PCSMP) approval is required before the applicant may obtain a Building Permit from the City of Philadelphia Department of Licenses and Inspections (L&I). Less formally, PWD also coordinates reviews with other City agencies to promote continuity between department reviews and expedite the applicant through the City’s development review process when feasible.  This Section provides a brief description of the City departments with which PWD interacts and overlaps as part of the City’s development review process. It does not describe the full extent of each department’s work, but rather a perspective of their work as it relates to PWD’s review.

Licenses and Inspections


PWD works closely with L&I to enforce the PWD Stormwater Regulations (Stormwater Regulations) through the issuance of various L&I permits, including Zoning and Building Permits, and through active construction and maintenance inspections. PWD sign-off is a prerequisite approval for many types of permits issued by L&I.

As part of the Zoning Permit review, the applicant will need to present the Conceptual Stormwater Management Plan and Approval Letter if the total earth disturbance associated with the project exceeds 5,000 square feet (Section 2.3). Although the primary purpose of the Conceptual Review Phase is to demonstrate compliance with the Stormwater Regulations, if the applicant is applying for a stormwater management based height or density bonus (such as the Green Roof Density Bonus or Height Bonus in the East Callowhill Overlay District), acknowledgement that PWD requirements for the bonus have been meet will be noted in the Conceptual Approval Letter. Therefore, it is important for the applicant to note in the ERSA Application (Section 2.1.1) if such a bonus is being sought. PWD does not review Conceptual Stormwater Management Plans for compliance with all aspects of the Zoning Code. It is the applicant’s responsibility to make sure all plans submitted to PWD are code-compliant.

A summary of required PWD approvals by L&I permit type is provided in Table 2.6-1.

Table 2.6-1: Summary of Required PWD Approval by L&I Permit Type

L&I Permit

Required PWD Approval

Zoning Permit

PWD Conceptual Approval is required for projects that propose more than 5,000 square feet of earth disturbance, or that are subject to the Wissahickon Watershed Overlay.

Building Permit – Demolition PWD Conceptual Approval is required for projects that propose more than 5,000 square feet of earth disturbance, or that are subject to the Wissahickon Watershed Overlay. If more than 15,000 square feet of earth disturbance (5,000 square feet in the Darby and Cobbs Creeks Watershed) of earth disturbance is proposed, additional E&S approvals will be required from PWD and/or PADEP (See Section 2.7).

Building Permit – Foundation Only and New Construction

Building Permit Application must be stamped by PWD Water Transport Records (WTR). The PWD Stormwater Plan Review Website contains a checklist of all prerequisite PWD approvals that must be presented to WTR in order to receive a PWD stamp on the Building Permit Application.

Plumbing Permit

Valid PWD Water Service Permit, PWD Meter Installation Permit, and PWD Backflow Prevention Assembly Installation Permit (as applicable). Projects proposing sewer connections greater than six inches in diameter must first complete a sewer connections review with PWD WTR.


PWD Private Development Services staff coordinate with L&I staff in the enforcement of development projects that are not in compliance with Stormwater Regulations or the Pennsylvania Department of Environmental Protection (PA DEP) Erosion and Sediment Pollution Control Program Manual (2012 or latest). When deemed necessary, PWD will request L&I enforcement support on non-compliant properties.

The City of Philadelphia Plumbing Code

L&I also administers the City of Philadelphia Plumbing Code (Plumbing Code). All requirements of the Plumbing Code must be met when designing a project to meet the Stormwater Regulations. This includes, but is not limited to, the design of all stormwater drainage piping as per the Plumbing Code. PWD will often refer the applicant to L&I for specific questions regarding sewer and water configurations as related to the Plumbing Code.

Philadelphia City Planning Commission

The Philadelphia City Planning Commission (PCPC) reviews development projects for various reasons, including the relocation of lot lines, location in Neighborhood Conservation Districts, Façade Control Districts, construction of parking garages or surface parking lots, and location within flood plains. As part of PCPC review, PWD’s Conceptual approval (see Section 2.3) may be required.  If the project involves relocation or striking of a public or drainage right-of-way (ROW), approval from PWD may be required. These prerequisite PWD approvals may also be requested by the Civic Design Review Committee for projects that trigger this requirement.

While PWD and PCPC generally conduct their reviews independently, these agencies work directly with each other to administer §14-510 Wissahickon Watershed Overlay of the Philadelphia Code.

Wissahickon Watershed Overlay

To help reduce flooding, erosion, siltation, and channel enlargement resulting from development within the Wissahickon Creek Watershed, additional stormwater management requirements and impervious coverage limits may apply to projects within this watershed.

Projects located in the Wissahickon Creek Watershed are subject to the Philadelphia City Code §14-510 / WWO Wissahickon Watershed Overlay District. A map of the overlay is provided within the Code; however, the applicant can determine whether the project lies within the overlay by using the City of Philadelphia online zoning map.

If the project is in the WWO, the applicant is advised to meet with PCPC prior to submitting the project’s Existing Resources and Site Analysis (ERSA) Application. Depending on the project’s location within the WWO, lot size, and net change in impervious area, PCPC may restrict new impervious cover, or impose additional stormwater management requirements (beyond PWD’s Stormwater Regulations), which must be noted by the applicant in the project’s ERSA Application (Section 2.1.1). Should the project be applicable to additional requirements as determined by PCPC, PWD Stormwater Plan Review will be responsible for review of the PCSMP.

PCPC does not use an earth disturbance threshold when determining whether stormwater management is required. Therefore, it is possible for development projects to trigger Post-Construction Stomwater Management Requirements under the WWO without triggering the Stormwater Regulations.  Projects that fall under this category must follow the Development Compliance Review Path as defined in Section 2.2.1.  These projects must also abide by all PWD design standards when designing systems to meet the WWO stormwater requirement.

Streets Department

The Streets Department is involved in the review of most development projects, particularly if a street opening or closing permit is required, there is bollard installation, new driveway or curb cuts are to be constructed, there are changes to ROWs or curb line widths, Americans with Disabilities Act (ADA) improvements are needed, or other ROW improvements are involved. As part of their plan review process, the Streets Department solicits comments from PWD Stormwater Plan Review and PWD Design Branch to incorporate in their review letters. The comments provided by PWD will often direct the applicant to make a formal submission to the appropriate PWD unit for review.

If the applicant is proposing to make changes to PWD infrastructure located within the public ROW to accommodate a development, this work must be reviewed by the Streets Department. This includes minor improvements, such as relocation of an inlet, as well as major improvements, such as the complete striking of an existing drainage ROW. Some of these changes may also require the applicant to complete the Complete Streets Checklist with the Streets Department. As part of their review, the PWD Design Unit (Section 2.5) will clarify for the applicant when and how the Streets Department should be notified.

While not required for Regulatory compliance, the applicant is encouraged to review the Green Streets Design Manual for opportunities to incorporate stormwater management into streetscape improvements. If the applicant believes their project presents an opportunity to incorporate Green Streets, they are encouraged to contact GSI Planning and Design (Section 2.5) as early as possible in the design process.

Department of Planning and Development

The Department of Planning and Development facilitates the Developer Services Program, which helps large real estate projects connect to key City departments through Developer Services Committee Meetings. The applicant can contact the Department of Planning and Development to convene a meeting of the committee. A representative from Projects Control will serve as the PWD chair during these meetings.

Office of Property Assessment

For projects that trigger the Stormwater Regulations, PWD uses the Office of Property Assessment (OPA) address records to track projects and determine the appropriate address used in recording the Operations and Maintenance (O&M) Agreements (Chapter 5). The applicant is encouraged to refer to the OPA website to confirm the legal address prior to submitting an ERSA Application to PWD. If an applicant disagrees with the address being used by PWD in the preparation of the O&M Agreement, the applicant should contact OPA for resolution.

PWD also uses OPA records to determine parcel boundaries and property classification (non-residential versus residential), which factor heavily into determining a monthly stormwater bill. If over the course of a development these features change, the applicant is advised to contact PWD Stormwater Billing and Incentives (Section 2.5) so that the appropriate changes are reflected in subsequent stormwater bills.

Department of Records

O&M Agreements are recorded against the property for all projects that trigger the Stormwater Regulations. The owner is responsible for the recording of the O&M Agreement with the Department of Records (DOR); however, PWD may record this Agreement on the owner’s behalf. The DOR charges a fee for all recordings and the DOR fee schedule is used to determine O&M Agreement recording fees. To obtain a copy of the recorded O&M Agreement, the applicant must contact DOR.