Drainage & Grading Solutions
in Wilmington, NC
Wilmington Elite Grading & Excavation has been fixing yard drainage and grading problems for Wilmington-area homeowners for over 20 years! Yard drainage improvements typically cost between $2,000 and $15,000 depending on the size of the affected area and the drainage solution required, and Wilmington's wet season, which delivers nearly 40% of the year's rainfall between July and September, makes proper drainage design especially important here. Standing water that lingers more than 24 to 48 hours after rain is one of the clearest signs a property needs professional drainage correction rather than a temporary fix.
Ignoring a drainage problem rarely makes it go away, since persistent standing water gradually causes foundation stress, soil erosion, and turf failure that cost far more to repair than the original drainage fix would have. Wilmington Elite Grading & Excavation diagnoses the cause of a drainage issue first, then designs a French drain, swale, or regrading solution matched to the property's soil, slope, and water volume.
Why Choose Us
Local Land Grading
& Excavation Contractors
Wilmington Elite Grading & Excavation has completed grading and excavation work on more than 1,800 residential and commercial lots across the greater Wilmington region. Our crews understand New Hanover County's flood zone maps, Cape Fear River floodplain restrictions, and the sandy, well-drained soil common to coastal Southeastern North Carolina construction.
Advanced Grading Techniques
Our operators are trained on laser-guided grading systems, GPS machine control, and compaction testing equipment that verifies soil density meets 95% Proctor compaction standards before foundation work begins. Equipment operators complete manufacturer safety certification and OSHA 10-hour construction safety training.
Proven Track Record
More than 92% of customers who complete a project with us report they would use our services again for future site work, based on internal post-project surveys. Our completed project mix spans new home construction, commercial pad sites, septic system installs, drainage correction, pond excavation, and storm-damage debris removal following tropical storm activity.
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Drainage & Grading Solutions We Provide
French Drain Installation
We install French drains, a perforated pipe surrounded by gravel in a sloped trench, to intercept and redirect groundwater and subsurface water away from a foundation or low-lying area. Standard exterior French drain systems typically cost $20 to $35 per linear foot, while foundation perimeter systems run higher due to deeper excavation near the structure. This service works especially well for high water table conditions common near Wilmington's tidal creeks and marshland.
Drainage Swale Grading
We grade shallow, sloped channels called swales that guide surface water across a property toward an approved discharge point using nothing more than the shape of the land. Swale installation typically costs $0.50 to $1.00 per square foot, making it a lower-cost option than a piped French drain system for properties with room to grade a surface channel. Swales require at least a 1% slope to function properly and occasional regrading to stay effective over time.
Yard Regrading for Drainage
We regrade yards where the original grade fails to direct water away from the home, correcting the six-inch drop over ten feet standard that positive drainage requires. Regrading a full yard typically runs $1,000 to $3,000, while correcting the slope on just one side of a house runs $500 to $1,000. This service resolves the root cause of many recurring standing water complaints rather than just managing the symptom.
Dry Well and Catch Basin Installation
We install dry wells and catch basins to collect and slowly disperse water at low points where a swale or French drain alone isn't enough to keep an area dry. Dry wells work well for isolated wet spots, while catch basins intercept runoff before it reaches a structure or paved surface. This service is often combined with a French drain or swale as part of a complete drainage plan.
Downspout and Roof Runoff Management
We extend downspouts underground and tie them into a broader drainage system to prevent roof runoff from saturating soil directly beside a foundation. Downspout extensions typically cost $150 to $350 per downspout including pipe and burial. This service is one of the most common and cost-effective fixes for chronic foundation-area wetness.
Types of Properties We Serve
Residential Homes
Homeowners dealing with standing water, a soggy lawn, or water intrusion near a foundation need a drainage plan matched to their specific soil and slope conditions rather than a generic fix. We assess each property's drainage pattern during or shortly after a rain event whenever possible to see exactly how water moves across the lot.
New Construction and Builder Lots
Builders need drainage designed into a site's final grade from the start, since correcting drainage after a home is built costs significantly more than designing it in during site preparation. We coordinate drainage grading with our site preparation and land grading services on new construction projects.
Commercial Properties
Commercial properties often require engineered stormwater management systems that meet local ordinance requirements for runoff volume and discharge rate. We design and install drainage systems that satisfy commercial stormwater compliance while protecting the property from water damage.
Some of Our Customer Reviews
"We had a low spot in our backyard in Wilmington that stayed wet for days after every rain. The French drain they installed fixed it completely."
— Sandra L., Wilmington, NC
"They installed a swale along our property line in Leland and it's handled every storm since without any pooling."
— Mike T., Leland, NC
"Our foundation was showing signs of water damage and they diagnosed the drainage issue and fixed it in under a week."
— Patricia G., Southport, NC
Drainage & Grading FAQs
How much does drainage correction typically cost?
Most yard drainage projects cost between $2,000 and $15,000 depending on the size of the affected area, soil conditions, and whether a French drain, swale, or full regrading solution is needed.
How do I know if I need a French drain or a swale?
French drains work best for subsurface or groundwater issues and higher water table conditions, while swales work well for surface water moving across a wide, sloped area.
How long does drainage installation take?
Most residential drainage projects are completed within one to four days depending on the length and depth of the system being installed.
Will regrading my yard fix standing water permanently?
In most cases, yes, since correcting the underlying grade addresses the root cause rather than just redirecting water temporarily.
Do I need a permit for drainage work on my property?
Simple drainage systems that discharge entirely on your own property typically don't require a permit, but connecting to a stormwater system or working near an easement may.