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Plumbing Permit and Inspection Program

The mission of the Plumbing Permit and Inspection Program is to carry out and enforce the Delaware plumbing code consistent with basic plumbing principles, regulatory requirements, and Title 16 chapter 79 of Delaware Code.

The program accomplishes its mission by providing for the adoption and promulgation of suitable rules and regulations for the construction of plumbing facilities where mandated. The program provides a mechanism for the issuance of permits to Delaware licensed plumbers and homeowners whenever plumbing takes place, enforces plumbing codes and regulations, and hands down penalties when appropriate.

Office Location

The Delaware Division of Public Health Plumbing Permit and Inspection Program has offices in Kent and Sussex Counties.

Program Information

The Plumbing Permit and Inspection Program utilize the 2015 International Plumbing Code with Delaware specific amendments. The amendments are available at the Kent and Sussex County permit offices or at this link: Delaware Amendments

Permits and plumbing program staff consultations are available at both program locations.

This program inspects and permits plumbing installations statewide except where there are local jurisdictions. Plumbers and homeowners working on plumbing projects in jurisdictions with their own plumbing programs should contact the appropriate local office or county office regarding permit information. All Delaware jurisdictions shall enforce the Delaware Plumbing Code as adopted and amended by the Delaware Division of Public Health.


Permit applications are available in the links on the right side of this page.

Permits are issued to Delaware licensed plumber or homeowners whose homes are owner occupied and not for sale or lease

Plumbing applications must be complete with addresses and directions to job sites. Commercial jobs require plan submission, occupancy and occupant load to determine required fixtures.

The Division of Public Health charges a $100 fee for plumbing permits. All permit fees are payable by check or money order only. Payments are made to the State of Delaware The fees are retained by the Plumbing Permit and Inspection Program, and will be used to provide program staff and infrastructure to protect public health.

Permits may be obtained from Plumbing Permit and Inspection Program offices in Kent and Sussex counties, depending on project location. Licensed plumbers and homeowners may apply for permits in person at the Plumbing Permit and Inspection Program office.


The 2015 Delaware Division of Public Health Plumbing Code is effective 8-11-2015.

The Delaware Public Health Plumbing Permit and Inspection Program utilize the 2015 International Plumbing Code as Delaware’s plumbing code along with Delaware specific amendments at this link: Amendments

The 2015 International Plumbing Code is available from the IPC at their web site ICC link or by phone - 1-888-422-7233.


Plumbers or homeowners must have an approved permit prior to starting work or receiving an inspection.

All plumbing installations must be ready when called in with provisions for the plumbing inspector to access the property.

Plumbing covered over prior to inspection will not pass nor will the property be able to obtain a certificate of occupancy without passing the plumbing inspection.

All plumbing must have their tests on at the time of inspection or the plumber must certify the plumbing was tested on the test form on the right side of this page.

Applications and Forms

Residential Permit
Application - Homeowner


Residential Permit
Application - Contractor


Commercial Permit


Commercial Plan Review


Test Certification


Water Treatment

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