Western North Carolina · published market ranges

Yard drainage cost.

What it costs to route water off a whole yard — regrade, swales, and channels that carry surface runoff to a safe outfall — and the honest local reason it moves: steep ground throws more water at the yard and farther to send it. Below, a county-by-county slope breakdown, then your exact number from a free on-site walk. 24hr callback.

$10+

Surface run /ft (from)

$50

Surface run /ft (to)

Counties compared

2026-05-31

Data researched

Prefer to talk? (828) 490-1803

How much does whole-yard surface drainage cost in Western NC?

A surface drainage fix in WNC is priced as a routed system. The shallow exterior runs that steer water across a yard — swales, catch points, and daylighted pipe — run about $10–$50 per linear foot of run, and the total turns on how much regrade the lot needs and how far it is to a safe outfall. A small wet corner is modest; regrading a whole slope to shed water off the surface is larger. These are published market ranges, not a Ridgeline quote; your lot’s layout sets the real number. Free on-site estimates — (828) 490-1803.

What a surface drainage system is really solving

Surface drainage is a routing problem: water is landing or arriving somewhere it shouldn’t sit, and the fix is to move it off the surface and send it somewhere safe before it soaks in or ponds. That’s why it’s priced as a system, not a single line — the cost is the regrade to build fall away from the house, the swales and channels that collect and steer the flow, and the length of the route to a safe outfall. On a WNC lot the grading is usually the biggest lever: a slope above the house can shed a lot of water into the yard, and shaping the ground to carry it away is most of the job. Get the surface right and much of the water never becomes a puddle — which is why an honest number starts by tracing where the water comes from and where it can go.

What it costs

Yard & surface drainage — typical WNC ranges

These are typical Western North Carolina market ranges, not a Ridgeline quote. North Carolina construction runs about 12% below the national average, but our mountain terrain — 15–40%+ slopes, weathered bedrock and saprolite, clay, and tight access — pushes most jobs toward the high end of every range. A flat infill lot sits low; a steep escarpment lot sits at or above the top. Your exact price comes from a free on-site estimate.

Drainage & French drain — typical Western NC ranges (published market data, 2026-05-31)
Item	Typical WNC range	Notes
French drain (installed)	$25–$98/linear foot	NC ~2% below national
Yard / surface drain	$10–$50/linear foot	shallow exterior runs
Deep / curtain / foundation drain	$50–$70/linear foot	depth drives cost

What drives it: depth, length, soil drainage class (clay-over-rock vs sandy), daylighting vs sump, gravel + fabric spec.

Source: published WNC/NC market ranges via costonce.com and fixr.com . Exact pricing on your lot comes from a free on-site estimate — call (828) 490-1803.

The local lever

Why a drainage system costs more county to county.

Same routing job, different water. Steeper ground sheds more runoff into the yard and pushes the safe outfall farther away, so the regrade and the channel route grow — here’s the real spread across the four counties we work, from USDA-NRCS slope data and NC OneMap parcel size.

WNC yard drainage cost drivers by county — USDA-NRCS slope envelope + NC OneMap parcel size
County	Survey	Median lot	Parcels ≥ 5 ac	Slope envelope	Routing pressure
Buncombe	NC021	0.55 ac	5.7%	2–95%	Moderate–high — steep yards, shorter routes
Henderson	NC089	0.79 ac	11.7%	0–95%	Moderate–high — steep yards, shorter routes
Transylvania	NC175	1.24 ac	21.3%	2–95%	High — heavy runoff, long routes to outfall
Haywood	NC606	0.92 ac	16%	2–95%	Moderate–high — steep yards, shorter routes

Steeper, larger parcels (Transylvania, Haywood) shed more runoff into the yard and route farther to an outfall, so they trend to the high end; gentler lots with a close outfall (parts of Buncombe, Henderson) sit lower — but a whole hillside draining into any yard needs the same routed system. The county sets the odds; the route sets the price.

The parts of a drainage fix.

The service behind the number, and the pieces a mountain yard usually needs:

Other cost guides

Compare the numbers.

What the rest of our WNC site work runs, priced the same honest way:

FAQ

Yard drainage cost: common questions

How much does yard drainage cost in NC?

A surface drainage fix in Western North Carolina is priced as a routed system, not a single line. Shallow exterior runs — the swales, catch points, and daylighted pipe that carry water across a yard — run about $10–$50 per linear foot of run, and the total depends on how much regrade the yard needs and how far it is to a safe outfall. A small wet corner is a modest project; regrading a whole slope to shed water off the surface is a larger one. These are published market ranges, not a Ridgeline quote — the layout of your lot sets the real number.

What does a whole-yard drainage system actually include?

Routing, not one part. A surface system starts with regrading to build positive fall away from the house and low spots, then adds swales to collect and steer sheet flow, ditches or channels where the volume is heavy, catch basins at the low points, and a piped or open outfall that daylights the water somewhere it can leave safely. On WNC’s 2–95% slopes the grading is usually the biggest piece — move the surface right and half the water problem never reaches a pipe. The cost is the volume of regrade plus the length of the route to the outfall.

Do I need surface drainage, a buried drain, or both?

It depends on where the water is. Water running across the surface — roof runoff, a slope shedding into the yard, a soggy low spot — is a surface job: regrade and route it away. Water already in the ground — a hillside seep or a wet foundation — needs a buried interceptor, which is a french drain priced by the linear foot. Many WNC lots have both problems, so the fix is a surface system to carry the runoff plus a buried drain at the seep. Sorting which is which is the whole point of a site walk — the wrong tool moves water you didn’t need to touch and misses the water you did.

What pushes a drainage quote toward the high end?

Volume and distance. More runoff to move (a big roof, a long slope shedding into the yard) means bigger swales and channels; more regrade to build fall on a stubborn lot means more earthwork; and a long route to a safe outfall means more run and often a culvert or pipe to get there. Hardscape you have to work around, restoring lawn over the disturbed ground, and tight access for the machine all add cost. A single low spot near an easy outfall stays modest; re-routing a whole hillside’s water is the high end.

Does yard drainage cost more in Transylvania than Buncombe County?

Often, because the yards catch more water and the outfall is farther. Transylvania (survey NC175) runs a 1.24-acre median parcel on 2–95% ground, so slopes shed real volume into the yard and the route to a safe outfall is longer — more regrade, more channel. Buncombe (NC021) runs a tighter 0.55-acre median with shorter routes, so its low-end fixes sit cheaper — but a whole hillside draining into either yard needs the same routed system. See the county table below.

How do I get an exact drainage price for my property?

A free on-site walk — the only honest way to price a routed system. We trace where the water comes from and where it needs to go, set the regrade and the swale or channel route to a safe outfall, and put a real number in writing. On tracts that disturb over an acre we handle the NC GS 113A-57(4) (Sedimentation Pollution Control Act of 1973) plan ($119/acre E&SC fee). Call (828) 490-1803 or use the form for a 24hr callback.

Free estimate

Want a real price to route your water?

Show us where the water sits and where it comes from — we'll set the regrade and the route to a safe outfall, then put an exact drainage price in writing. Free estimate, no pressure.

Prefer to talk? (828) 490-1803