# Crawl Space Waterproofing Cost in Wilmington, NC > Crawl space waterproofing cost in Wilmington: surface fixes from a few hundred dollars, interior drainage $1,500–$5,000, and which one you need. URL: https://910crawlspacepros.com/guide/crawl-space-waterproofing-cost/ Home / Crawl Space Waterproofing / # Crawl Space Waterproofing Cost in Wilmington, NC Cost guide Crawl Space Waterproofing Cost in Wilmington, NC The cheapest fix is often the one nobody quotes for. Updated 2 August 2026 Crawl space waterproofing in Wilmington costs from a few hundred dollars for grading and downspout corrections to $1,500–$5,000 for a full interior perimeter drain with a sump. Most properties need some of both, and the surface work is almost always the better value. ## Surface fixes first, because they are cheap Downspouts discharging at the foundation and ground sloping back toward the house cause a large share of crawl space water, and both are inexpensive to correct. Extending downspouts six to ten feet and re-establishing fall in the first ten feet of grade frequently costs a few hundred dollars. A contractor selling interior drainage systems has no particular reason to look at your gutters. Ask about the exterior before agreeing to the interior. ## What interior drainage actually costs A perimeter drain at footing level, bedded in washed stone, running to a sealed sump with a pump and a proper discharge, runs $1,500–$5,000 on a typical Wilmington crawl space. The variables are perimeter length and clearance — everything costs more when it is done lying down. ## The bottom line Correct the surface water first and see what is left. On a meaningful share of Cape Fear properties that is the whole fix, at a fraction of the price of an interior system. For a number against your own crawl space, use the cost estimator , or call (910) 886-2018 and we will come and measure it. Get an exact quote A free on-site measure beats any online range. Website What do you need? Select a service… Crawl Space Encapsulation Crawl Space Insulation Crawl Space Waterproofing Crawl Space Mold Removal Crawl Space Vapor Barrier Installation Crawl Space Dehumidifier Installation Crawl Space Drainage Crawl Space Sump Pump Installation Crawl Space French Drain Crawl Space Cleanup Crawl Space Structural Repair Sagging Floor Repair Crawl Space Door Replacement Flood Vent Installation Not sure — I need someone to look ZIP code Continue Your name Phone What are you seeing? (optional) Back Request my inspection Got it — your request is in. We'll be in touch with a quote. Related service Crawl Space Waterproofing Related guides Crawl Space Repair Cost in Wilmington, NC Standing Water in Your Crawl Space: What to Do Crawl Space Mold Removal Cost in Wilmington, NC Crawl Space Insulation Cost in Wilmington, NC Crawl Space Encapsulation Cost Per Square Foot in Wilmington, NC All guides → , not a heading: this is a CTA, not a section of the document outline. --> Get your crawl space measured and priced Free on-site inspection across Wilmington and New Hanover, Brunswick and Pender counties. Free quotes within 24 hours. Call (910) 886-2018 Get a free quote ## Questions Is crawl space waterproofing worth it? Where water actually enters, it is the precondition for everything else — a liner over active water traps it. Where the space is merely humid, waterproofing is not what you need; a liner and dehumidification is. How long does crawl space waterproofing take? Surface corrections are a day. A full interior perimeter drain is typically two to four days depending on the run and the clearance. Does waterproofing come with a warranty? Ask specifically what is warranted — the workmanship, the pump, or a dry-space guarantee — and what voids it. A pump warranty is not the same as a promise the crawl space stays dry.