The Department of Land Use has announced the adoption of the following codes with amendments, effective March 1, 2015. 

        International Building Code, 2015 edition

        International Residential Code, 2015 edition

        International Existing Building Code, 2015 edition

        International Swimming Pool and Spa Code, 2015 edition

Additionally, the Department will enforce of the following codes on their respective effective date listed.

        International Energy Conservation Code 2012 – now being enforced

        International Mechanical Code, 2015 edition – August 1, 2015

        International Fuel Gas Code, 2015 edition – August 1, 2015

        International Plumbing Code, 2015 edition – August 1, 2015

All projects submitted on or after June 1, 2015 will be reviewed using the new regulations.  To receive additional extension between June 1, 2015 and August 31, 2015, the contractor or design professional must request the extension in writing and demonstrate the hardship for transitioning to the 2015 codes.

 The NCC amendments for the building code are available for download on the County’s website.  See for the administrative and adopted code amendment sections.  Code books are available for purchase through various vendors, including the International Code Council’s website at  New Castle County also has code books available for purchase.

 Additional information on the code changes specific to New Castle County can be found on the Department of Land Use website at To subscribe to automatic notices from Department of Land Use and other County services, including updates on this code adoption, see and sign up for email notifications.

Homeowners should apply for a permit only if they are doing the work themselves.If a contractor is doing the work, it is their responsibility to obtain the permit.

Please arrive prepared with all the necessary information and materials.Sign in using a computer kiosk at the main desk so that you will be placed on the list of those seeking this service.

In the Land Use Department, you will go through a screening process.Our staff will ensure that you have all the necessary paperwork and will verify that there are no overdue taxes and fees for the property.Next a planner will verify that the use is consistent with zoning requirements for the site. The construction plans will be examined to verify that you are within the legal setback and that the proposed structure meets all relevant size and height requirements.He/she can help answer any questions you may have about the construction process.

If you are new to the permit process or a do-it-yourselfer, please use the links on the left side of the page to learn more about requirements for your project.

Building Permit Application

While this is the correct application for most building permits, there are special applications for plumbing, HVAC, demolitions, signs, and special uses.Be sure to check with a licensed electrician regarding state requirements.

  1. Home Improvements

    See the requirements for home improvement permits.

  2. Non-Residential Permits

    Find permits and requirements for licensed contractors.

  3. Other Permits

    Find additional miscellaneous permits.

  4. Residential Permits

    Learn about getting residential permits.

  5. Utility Permits

    Learn more about utility permits.