Yard Drainage Solutions & Cost Guide (2026): Fix a Wet, Soggy Yard

Start With the Cheap Fixes First

A wet yard almost always has a cheaper fix than the one a contractor quotes first. Before you spend thousands on a drain system, work through the solutions in order of cost — the table above ranks them cheapest to most expensive. A surprising share of drainage complaints are solved for under $100.

The two cheapest fixes solve the two most common causes. Downspout extensions ($15 to $60 each) carry roof water at least 6 feet away from the foundation instead of dumping it at the corner of the house. Regrading the soil so it falls away from the foundation — 6 inches of drop over the first 10 feet — stops water from running back toward the house in the first place.

Only after the cheap, obvious fixes are done should you consider a swale, dry well, catch basin, or French drain. Paying for a French drain when the real problem is a downspout dumping at the foundation is the single most common drainage mistake homeowners make.

Whatever solution you land on, size the gravel and pipe with real numbers. Our Gravel Calculator and Retaining Wall Drainage Calculator turn trench dimensions into an exact material list so you can check quotes against reality.

Match the Solution to the Symptom

Drainage is not one-size-fits-all. Each solution targets a specific problem, and the fix only works if it matches the symptom. Diagnose before you dig.

Water pools at the foundation after rain: the culprit is almost always downspouts and grading. Extend the downspouts and regrade the first 10 feet of soil before anything else.

Water runs across the yard as surface runoff: a swale — a shallow, graded, planted channel — intercepts and redirects it to a safe outlet. It is the natural, low-maintenance option for moving surface water.

A specific low spot ponds and stays wet: a catch basin (a grated box that collects water) piped to daylight or a dry well drains that spot. Chronic subsurface wetness, a soggy lawn days after rain, or a wet basement points to a French drain instead.

Downspouts & Grading: The $20–$3,000 Fixes

Downspout extensions are the highest-value drainage fix there is. A rigid or roll-out extension costs $15 to $60 and moves thousands of gallons of roof water away from the foundation each year. Buried drain lines that carry downspout water to daylight run $200 to $1,000 installed but look cleaner than surface extensions.

Regrading is the next step up. Minor regrading — adding and sloping topsoil along one side of the house — can be a DIY weekend with a few yards of soil ($500 to $1,000 in materials). Major regrading with machinery to reshape a whole yard runs $1,000 to $3,000 or more.

The target grade is 6 inches of fall over the first 10 feet away from the foundation, then a gentler continuous slope toward the yard. Water should never be able to sit against the house or run back toward it.

These two fixes together solve most wet-basement and foundation-moisture complaints for a few hundred dollars. Always exhaust them before paying for a drain system.

Swales & Dry Wells: The $1,500–$5,000 Options

A swale is a shallow, gently sloped channel — usually grassed or planted — that collects surface runoff and carries it to a safe outlet. It is essentially engineered low ground. A professionally graded swale costs $1,500 to $5,000 depending on length and landscaping, and once established it needs almost no maintenance.

A dry well is a buried, gravel-filled or perforated basin that gives collected water somewhere to soak into the soil slowly. It is the outlet when you have nowhere to discharge to — no street, ditch, or lower ground. Dry wells run $1,500 to $4,000 installed and are sized to the volume of water they must hold.

Swales and dry wells often work together: the swale moves surface water, the dry well absorbs it. Both depend on the surrounding soil draining reasonably — in heavy clay a dry well fills faster than it empties, so a percolation test matters before you build one.

Size the stone for a dry well with our Gravel Calculator — enter the pit dimensions to get the tons of drainage rock you need.

Catch Basins & French Drains: The Bigger Systems

A catch basin is a grated box set at a low spot that collects ponding water and pipes it away to daylight, a dry well, or a storm connection. A single basin with a run of pipe costs $1,500 to $5,000 installed. It is the right fix when one identifiable low area ponds after every rain.

A French drain — a gravel-filled trench with a perforated pipe — handles subsurface water: a soggy lawn that stays wet for days, water moving down a slope toward the house, or a damp basement. Exterior yard drains run $500 to $1,500 for a typical 50-foot run; interior basement systems with a sump pump reach $5,000 to $12,000.

These systems overlap, and many yards use more than one. A catch basin can feed a French drain; a French drain can discharge into a dry well. The right combination depends on where the water comes from and where it can safely go.

For the full French-drain breakdown — types, per-foot pricing, and step-by-step installation — see our dedicated French Drain Cost Guide.

Drainage on a Slope

Sloped yards drain fast, which sounds good until the water arrives somewhere it should not — against the house, into a neighbor's lot, or behind a retaining wall. On a slope, the goal is to intercept water uphill and route it safely around what you want to protect.

A curtain drain (a French drain placed uphill of the area to protect) is the classic slope solution. It catches water before it reaches the house or wall and carries it to daylight lower down the grade — slopes make daylight discharge easy, which keeps the cost down.

If a retaining wall is involved, drainage is not optional. Water building up behind a wall creates hydrostatic pressure that eventually pushes it over — poor drainage is the number one cause of retaining wall failure. Every properly built wall includes a perforated pipe in clean gravel behind it, sloped to daylight.

Building or repairing a wall on a slope? Our guide on how to build a retaining wall on a slope walks through the buried base, gravel backfill, and drain-to-daylight outlet in detail.

What Drives the Price

Length and depth: More pipe, more trench, and deeper excavation all raise labor and material costs. Depth matters most because it dictates how much soil is dug and hauled.

Soil and access: Rocky or heavy clay soil is slow to dig and drains poorly, sometimes ruling out dry wells entirely. A tight backyard a machine cannot reach means hand-digging, which multiplies labor.

Where the water goes: Every system needs an outlet — daylight, a dry well, or a storm connection. Daylight is cheapest when the terrain allows it; a dry well or pop-up emitter adds digging and material.

Restoration: Reinstalling sod, replanting beds, or resetting pavers after trenching adds to the final bill. Factor in whatever the work crosses.

Combination systems: Most real yards need two or three measures together. Budget for the combination, not just the single line item a contractor leads with.

DIY vs. Hiring a Pro

The cheap fixes are firmly DIY. Downspout extensions, minor regrading, and even a modest gravel swale are realistic weekend projects for a fit homeowner with a few yards of soil or stone and a rented trencher ($150 to $250 per day).

The bigger systems lean professional. Catch-basin networks, dry wells sized to real flow, and interior French drains involve grading precision, deep excavation, and sometimes a sump pump — get these wrong and you can make the water problem worse.

A common hybrid works well: do the downspouts and grading yourself, then hire out the engineered system if water still collects. You get the cheap wins immediately and only pay for expertise where it counts.

Whatever you tackle, call 811 before digging, confirm every drain has a real outlet, and size your gravel and pipe with our Gravel Calculator and Retaining Wall Drainage Calculator so you buy the right amount once.