Standing water in the yard isn't just annoying — left alone, it can rot deck posts, crack foundations, drown grass, and breed mosquitoes. The fix depends on where the water is coming from and where it needs to go, and that's where a lot of homeowners get the order of operations backwards.
What's Actually Causing the Puddling?
Before you hire anyone, watch your yard during and right after a hard rain. Where does water sit, and for how long? A spot that drains within a few hours is usually a grading issue. A spot that stays soggy for a day or more, especially near a foundation or in a low corner of the lot, points to a groundwater or heavy-clay-soil problem that needs an actual drainage system, not just dirt moved around.
Soil type matters too. Clay-heavy soil absorbs water slowly and holds it near the surface, which is why the same amount of rain causes real problems on one lot and none on the neighbor's. If you're not sure what you're dealing with, a landscaper can run a simple percolation test — dig a hole, fill it with water, and time how fast it drains.
Is It a Grading Problem?
Grading (or regrading) means reshaping the soil so water flows away from your house and toward a place it can safely soak in — a lawn area, a swale, or the street. The International Residential Code sets the baseline most contractors work from: the ground should fall at least 6 inches over the first 10 feet away from the foundation. That's roughly a 5% slope — gentle enough to mow, steep enough to move water.
Grading is usually the least invasive fix, and it should be the first thing you rule out before spending money on drains. According to HomeGuide, regrading a small area typically runs $500 to $1,000, while a full backyard regrade lands in the $1,000 to $5,000 range, and contractors often charge $50 to $200 per cubic yard of soil moved. Steep lots or heavy clay can push costs toward the high end.
The catch: grading only solves surface runoff. If water is coming up from a high water table or seeping through soil at depth, moving dirt around won't fix it.
When Do You Need a French Drain?
A French drain is a trench with a perforated pipe wrapped in gravel and fabric, buried at a slope so it intercepts water below the surface and carries it somewhere useful — a storm drain, a dry well, or a lower point on the property. It's the standard fix for a yard that stays wet well after grading, or for water tracking toward a foundation from higher ground nearby.
According to published cost guides, exterior yard French drains run $10 to $35 per linear foot (HomeGuide), with total project costs typically landing between $1,500 and $5,000 for a straightforward yard installation. Deeper perimeter systems or ones tied into a sump pump cost more — full projects nationally range from about $500 to $18,000 depending on length, depth, and site access, per Angi.
Trenching alone (before pipe and gravel) tends to run $4 to $16 per linear foot, so a big part of the bill is labor and site conditions — rocky soil, tree roots, or hardscape you have to cut through and repair will push a quote higher.
What About a Dry Well?
A dry well is a buried gravel- or chamber-filled pit that collects water — often from a downspout or the outlet end of a French drain — and lets it slowly soak into the surrounding soil. It's the right tool when you have a specific, contained volume of water to get rid of (like roof runoff) rather than a whole yard that stays wet.
Cost estimates vary by source but land in a consistent band: Angi and HomeGuide both put typical dry well installation at roughly $1,200 to $5,200, with many homeowners landing near $3,000. A basic gravel or plastic-tank dry well can cost as little as $50 to $700 in materials alone; a larger concrete unit can run up to $3,000. Labor generally runs $50 to $100 per hour, and sites with poor soil absorption may need a percolation test first, adding $150 to $1,000.
Comparing the Three Options
| Fix | Best for | Typical cost range |
|---|---|---|
| Grading | Surface water pooling after rain, minor slope issues | $500 – $5,000 |
| French drain | Persistent wet ground, water moving toward foundation | $1,500 – $5,000 (yard); up to $18,000 for full perimeter systems |
| Dry well | Contained runoff (downspouts, one low spot) needing somewhere to go | $1,200 – $5,200 |
Most real drainage plans combine two of these — grading to direct water into a French drain, which then empties into a dry well — rather than relying on just one.
What to Do About It
Start by mapping the problem: note where water sits, how long it takes to drain, and whether it's near your foundation. That tells you whether you're looking at a $500 grading fix or a multi-thousand-dollar drainage system.
From there, get more than one opinion. Drainage work is one of those categories where two licensed pros can look at the same wet spot and propose very different (and very differently priced) solutions — one might want to regrade, another might jump straight to a French drain with a sump pump. Getting multiple quotes side by side is really the only way to know whether a price is fair, instead of just hoping the first contractor you call got it right. It also surfaces disagreements about scope early, before you've signed anything.
Before hiring, ask each contractor what's causing the water (not just how they'll move it), get the scope and materials in writing, and confirm they're pulling any required permits for grading or drainage work in your area — requirements vary by city and county.