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С��Ѽ��Ƶ County UDO Section 21-11 provides a definition of “Impervious Surface”.  The definition helps clarify what surface materials in the landscape are considered impervious (i.e. concrete, asphalt, etc.) and prohibit water to infiltrate the material and into the subsoil.  Impervious surface coverage in site development is usually limited to a certain percent of the overall site. These limitations help reduce surface water runoff and protect water quality.  N.C. Session Law 2024 (Senate Bill 166) is mandating a new definition of “Built-Upon Area” (impervious surface) that local jurisdictions must comply with.  The law became effective January 1, 2025.С��Ѽ��Ƶ

The definition mandated by the new state law reads: “the term "built-upon area" means impervious surface and partially impervious surface to the extent that the partially impervious surface does not allow water to infiltrate through the surface and into the subsoil.  For the purposes of implementing State or local government stormwater programs, none of the following surfaces shall be considered "built-upon area" or an impervious or partially impervious surface:

1. A slatted deck.
2. The water area of a swimming pool.
3. A surface of number 57 stone, as designated by the American Society for Testing and Materials, laid at least four inches thick over a geotextile fabric.
4. A trail as defined in G.S. 113A-85 that is either unpaved or paved as long as the pavement is porous with a hydraulic conductivity greater than 0.001 centimeters per second (1.41 inches per hour).
5. Landscaping material, including, but not limited to, gravel, mulch, sand, and vegetation, placed on areas that receive pedestrian or bicycle traffic or on portions of driveways and parking areas that will not be compacted by the weight of a vehicle, such as the area between sections of pavement that support the weight of a vehicle.
6. Artificial turf, manufactured to allow water to drain through the backing of the turf, and installed according to the manufacturer's specifications over a pervious surface.”

The County UDO revisions approved by the BOC on April 7, 2025 include the above language and  include a provision in the Impervious Surface definition that designates stormwater control measures as pervious surface when designed in accordance with the С��Ѽ��Ƶ County Stormwater Manual; and add a definition for Stormwater Control Measure.  Stormwater Manual revisions are underway that will include allowing permeable pavement with a stormwater permit and designed in accordance with the NC BMP Manual requirements. 

All Permit Applications and Documents Shall be submitted through the Portal

All permit submittals will be made online through the Permit Portal.

You will submit the same application, fees, construction drawing, calculations and maps as always but DIGITALLY and through the Permit Portal. You will upload documents and be invoiced once the application and fees due are verified. You will be able to track the progress of your permit through the portal.

First, you will need to create a Login account. Engineering firms should consider creating an account for the firm rather than individuals.

Print out the Document below for instructions on how to apply online.

EROSION CONTROL, STORMWATER AND FLOOD STUDY INSTRUCTIONS

Protect against downstream flooding

Effective November 2019, all С��Ѽ��Ƶ County Stormwater submittals will require analysis of downstream impacts. 

Building permits must be linked to a land disturbance permit

Effective October 2019, a С��Ѽ��Ƶ County single lot building permit will be linked to its required single lot land disturbance permit. Exemptions may apply, e.g. lots outside of subdivisions with less than 1 acre of disturbance. Contact С��Ѽ��Ƶ County to request an exemption.

State requires land disturbance permit for all lots in a Common Plan of Development

Effective April 1, 2019 – all single-family dwellings in an active subdivision require land disturbance permit coverage! Go to single lot web page for details

Logging is considered land disturbance. A land disturbance permit must be issued prior to clearing land for new development if clearing is greater than 1 acre (measured cumulatively). Logging for forestry must have an approved forest management plan including protection of riparian buffers. 

Call for inspection of tree protection fence and silt fence prior to clearing near any water features. 

Tree removal on homeowner lots is allowable outside of setbacks and buffers.

Revised maps were adopted in 2022

Draft FEMA Floodplain Maps were received in 2015. Public meetings were held and appeals reviewed. С��Ѽ��Ƶ County received its Letter of Final Determination from the Federal Government FEMA Office in 2022 and adopted the new maps by ordinance revision. 

The 2022 maps can be viewed on IMAPS. 

The Permit Extension Act ended as of 1/12/2023

С��Ѽ��Ƶ County is reminding developers of ongoing construction projects in the county to renew their expired 'Land Disturbance' permits. There are over 600 developments underway in С��Ѽ��Ƶ County, ranging from residential buildings to commercial constructions. Approximately 200 of these projects have permits that have expired and require renewal.

С��Ѽ��Ƶ County has notified most of the developers with expired permits to renew them through emails and are reaching out to those where the email was misdelivered. Developers are also responsible for checking their permit expiration dates on the and initiating the renewal process. They can choose between two options for renewal:

Option 1 - Renew at Original Footprint:

• Renew permit based on the same area originally permitted.
• Update ownership or information if needed.
• Pay renewal fees

Option 2 - Renew at Remaining Acreage:

• Renew your permit based only on the part of the land that isn’t completed and doesn’t have permanent groundcover established.
• Provide a one-page update from an engineer, showing active work areas and ground coverage. Pay plan review fee of $75.
• Update ownership or information if needed.
• Pay renewal fees

Developers must contact С��Ѽ��Ƶ County to select an option and complete the renewal within the next 3 months to avoid enforcement actions or fines. Failure to renew expired permits can result in fines.

At the February 22, 2022 meeting of the NC Sedimentation Control Commission, the Town of Knightdale received delegated authority to administer a local erosion control program. Application for Land Disturbance Permits for projects in Knightdale and its ETJ shall be submitted to Knightdale as of May 16, 2022. 

Ten Year Rules Review

The State of NC Rules Review Commision reviews all rules every ten years. 

Pursuant to G.S. 150B-21.3A(d)(2), the 15A NCAC 02K rules listed in the attachment shall be readopted by the agency no later than February 1, 2027. Pursuant to G.S. 150B-21.3A(d)(2), the 15A NCAC 02B, 02H, 02T, and 02U rules listed in the attachment shall be readopted by the agency no later than June 1, 2029

Under review are the Neuse, Jordan and Falls Lake Rules. 

As of 2025, С��Ѽ��Ƶ County is still operating under the original Neuse Rules which require compliance with nutrients and peak flow.