Do You Need a Permit for a French Drain in York County, SC?
Most residential French drain jobs do not require a permit - but the answer depends on your jurisdiction and project scope. Here is what you need to know before work starts.
Projects disturbing under 1 acre (the vast majority of residential French drain jobs) are generally exempt from the York County Land Disturbance Permit.
Fort Mill: 803-547-2034. York County: 803-909-7200. Flood zone properties and projects near waterways have separate requirements.
Fort Mill TownFort Mill Town Permits
Properties within the Fort Mill town limits are governed by Fort Mill's Building and Codes Department, not York County. Fort Mill issues its own permits for construction and land-disturbing activity.
For a standard residential French drain installation (perforated pipe trench under 1 acre), no building permit is required in Fort Mill. However, if your project involves significant grading or rerouting of stormwater that could affect neighboring properties or the town's storm system, a grading permit may be required.
- Phone: 803-547-2034
- Building Official: Kenn Jackson, 803-835-1157
- Address: 205 N. White St., Fort Mill, SC 29715
- Permitting page: fortmillsc.gov/396/Permitting
- Stormwater page: fortmillsc.gov/242/Stormwater
Unincorporated York CountyYork County Permits
Properties outside Fort Mill town limits in unincorporated York County fall under York County Building and Codes and the York County Land Development office.
York County requires a Land Disturbance Permit for any land disturbance of 1.0 acre or more. A typical residential French drain installation disturbs well under 1 acre (usually 0.01 to 0.1 acres for a trench) and does not trigger this requirement.
The fee for a Land Disturbance Permit when required is $350 per disturbed acre, plus a $50/acre Resource Remediation Fee. For large-scale grading projects or commercial work, NPDES coverage through SCDES may also be required.
- Phone: 803-909-7200
- Online portal: evolvepublic.yorkcountygov.com
- Residential permits: yorkcountygov.com/598/Residential-Permits
- Land development: yorkcountygov.com/903/Land-Development
- Stormwater plan review: yorkcountygov.com/382/Stormwater-Plan-Review
- Stormwater contact: TIDE@Yorkcountygov.com | Emergency: 803-329-1110
Flood Zone Properties: Additional Requirements
Properties in FEMA Special Flood Hazard Areas (Zone AE) near the Catawba River, Sugar Creek, or other waterways in Fort Mill and Tega Cay face separate permit requirements. Any work that modifies drainage or grading within a flood zone requires a permit and may require a Floodplain Development Permit from York County.
You can check whether your property is in a flood zone using the FEMA Flood Map Service Center or York County's online flood map viewer:
- FEMA Flood Map Service Center - enter your address to find your flood zone designation
- York County Flood Map Viewer - interactive map showing York County flood zones
- York County Floodplain Management - permits and contacts, Floodplain Manager: 803-909-7157
York County updated its Chapter 151 Flood Damage Prevention Ordinance on June 3, 2024. If your property is in or near a flood zone, confirm current requirements before any drainage work.
South Carolina State Stormwater Rules
The SC Department of Environmental Services (SCDES) regulates stormwater at the state level under NPDES authority. For individual residential French drain installations disturbing under 1 acre, state NPDES permit coverage is generally not required.
Larger projects (1+ acres disturbed) require an NPDES Construction General Permit and a Stormwater Pollution Prevention Plan (SWPPP) prepared by a licensed SC engineer or land surveyor. As of April 7, 2025, all NPDES permit applications in SC must be submitted through the SCDES e-permitting system.
York County's Chapter 152 (Stormwater Management and Sediment Control Ordinance) also governs local drainage standards for larger disturbed-area projects.
Practical Summary for Homeowners
- 1Most residential French drain jobs (50 to 200 ft of trench) disturb a fraction of an acre and do not require any permit in Fort Mill or York County.
- 2Confirm jurisdiction first: Fort Mill town limits use Fort Mill Building and Codes (803-547-2034). Everything else uses York County (803-909-7200).
- 3Properties near waterways or in flood zones have additional requirements - check the FEMA map for your address before work starts.
- 4We handle the permit research as part of our project evaluation. If a permit is required for your specific site, we'll tell you before work begins.
- 5Always call 811 before any excavation to have underground utilities marked. This is required by SC law, not optional.
Key Contacts
Questions About Your Specific Job?
We assess permit requirements as part of every free on-site evaluation. If a permit is required, we tell you before we start and advise on the process.
Schedule a Free AssessmentPermit Questions
How do I know if I'm in Fort Mill town limits or unincorporated York County?
The Fort Mill town limits and unincorporated York County are not the same as the 29715 zip code. The zip code covers both. You can call the Fort Mill Building and Codes Department at 803-547-2034 and give them your address - they will confirm whether your property is in town limits or not. You can also use the York County GIS mapping site to look up your parcel.
Does the contractor need to pull the permit, or do I?
In most jurisdictions, the licensed contractor pulls the permit for the work. We handle permit research and filing as part of our project service when a permit is required. We do not start work until the permit is in hand.
What if I already installed a French drain without a permit - is that a problem?
If no permit was required (which is the case for most residential French drain jobs), there is no issue. If a permit was technically required and was not obtained, you may encounter difficulty during a property sale, as inspectors during a home inspection or appraisal may flag unpermitted work. If you are unsure, call the applicable building department to confirm what was required for your project.
Does the 811 call-before-you-dig rule apply to French drains?
Yes. South Carolina state law requires you to call 811 before any excavation, regardless of depth or project type. We always call 811 before starting work. Failure to call and damage to a utility line can result in significant liability.