# French Drain Cost in Oklahoma | 2026 Price Guide

> Oklahoma French drain costs: exterior $10–$15/ft (~$1,000–$1,500), interior $50–$60/ft (~$5,000–$6,000). What drives price.

URL: https://okcfrenchdrains.com/guide/french-drain-cost-oklahoma/
Last-Modified: 2026-04-15

![French drain crew laying perforated pipe and gravel in a residential trench in Oklahoma](/images/misc/crew-laying-perforated-pipe-and-gravel-in-a-reside.webp)

We frequently talk to homeowners shocked by wide-ranging drainage estimates.

A massive price spread is completely normal in this industry.

When calculating a true french drain cost, Oklahoma contractors often quote anywhere from $800 to $9,000 because they use the same term for two entirely different projects. We see this confusion every single week across the OKC metro. That 680 credit score analogy applies here: there is a huge dividing line between a basic yard fix and a full foundation rescue.

The exact price relies on whether the system is **exterior** (in the yard) or **interior** (in the basement), its length, its depth, and the specific obstacles in the way. Our team at OKC French Drains focuses on providing premier 

yard drainage in Oklahoma City

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 that protects the structural integrity of your property. Let’s look at the data, what it actually means for your lawn, and how to accurately anticipate your true costs.

## Quick price ranges (2026)

We track local material rates closely to keep these estimates accurate. A standard cubic yard of ready-mix concrete in Oklahoma City costs around $175 in 2026. This raw material price directly impacts your basement work.

| Drain type | Per linear foot | Typical total |
| --- | --- | --- |
| Exterior French drain | $10 to $15 | $1,000 to $1,500 |
| Interior basement French drain | $50 to $60 | $5,000 to $6,000 |
| Surface drains and catch basins | priced per job | $400 to $1,500+ |
| Hydro-jetting cleanout of existing drain | priced per job | varies |

These figures represent honest local averages from the Greater OKC metro area. State-level pricing across Oklahoma generally stays in the exact same ballpark for residential work. If you’re still weighing whether the spend is warranted, our guide to the 

signs your yard needs a drainage system

[/guide/signs-you-need-yard-drainage/ →](/guide/signs-you-need-yard-drainage/)

 helps you gauge the severity first.

![Price-range infographic: exterior vs interior French drain per linear foot in Oklahoma](/images/misc/price-range-infographic-exterior-vs-interior-frenc.webp)

Two prices, two very different jobs. Exterior is what most homeowners want; interior is what flooded basements actually need.

## Exterior vs interior french drain cost: Why yard trenches are cheap and basements aren’t

It comes down to what the crew is cutting through.

### Exterior French drain ($10 to $15/ft)

We tackle a lot of water pooling issues in local backyards. Oklahoma sits on heavy montmorillonite clay soil, which expands up to 15 percent when wet and absorbs water very slowly. The job involves trenching through this dirt, laying perforated Schedule 40 PVC pipe in a gravel bed, and routing the water to a gravity-fed exit.

Our crews can cut through yard soil quite fast. The exit point, like a pop-up emitter or a curb fitting, is usually obvious to find. Surface restoration just requires reseeding the disrupted turf.

Most residential exterior runs measure 80 to 120 linear feet. That distance easily captures one or two swampy areas and moves the runoff to the property line. Your total usually lands at $1,000 to $1,500 for the complete system.

### Interior basement French drain ($50 to $60/ft)

We handle interior installations much differently than yard work. The crew must saw-cut and jackhammer your basement slab, excavate below the sub-slab to set the pipe, and pour fresh concrete over the trench. Concrete cutting is a notoriously slow process.

Our estimates always account for high-quality components. A dependable unit like the Zoeller M53 cast iron sump pump adds significant value, but it pushes the material costs up by $400 to $800. Plumbers also need to run the discharge line securely out of the basement.

A standard basement perimeter spans 80 to 120 feet. This brings the typical total to $5,000 to $6,000 for a complete sub-slab system with a sump pump and concrete restoration. 

We cover the full interior installation process here

[/interior-french-drains/ →](/interior-french-drains/)

 if you want the exact specifics.

![Comparison: exterior French drain trench vs interior basement sub-slab install](/images/misc/side-by-side-exterior-french-drain-trench-vs-inter.webp)

The job in dirt vs the job in concrete. Same idea, very different cost.

## What drives the price up

Within those ranges, four distinct factors shift the final number.

### 1\. Length

The most predictable variable is the total trench distance. A 60-foot run naturally costs half the price of a 120-foot run, assuming all other conditions remain equal. We measure length strictly during the on-site evaluation, rather than guessing from a satellite photo. Precision prevents surprise billing later.

### 2\. Depth

Drains must sit entirely below the water level you want to capture. Most exterior yard trenches hit a depth of 18 to 36 inches. Deeper cuts require more labor hours and create excess dirt spoil that needs hauling away. Sub-slab depth on interior runs relies completely on the existing slab thickness and the elevation of your sump pit.

### 3\. Concrete and landscape obstacles

We encounter obstacles on almost every established property. Cutting through a concrete driveway, a sidewalk, or a paver patio destroys expensive saw blades and eats up the clock. Working around mature tree roots requires careful hand-digging.

Our equipment cannot always access tight spaces. Trying to work in a narrow side yard where a mini-excavator will not fit forces a manual dig. Every single physical barrier adds labor time, which directly increases the final french drain price Oklahoma residents pay.

### 4\. Exit point distance

The gravity-fed exit must eventually drop the water off somewhere safe. The distance from the trench to the final discharge point determines how much smooth-wall pipe you need. Installers must carefully repair the surface grass along that entire path. Long exits across lots over 100 feet to the curb easily add several hundred dollars to an otherwise basic job.

## What can move the price down

Two specific strategies surprise most property owners.

-   **Combining drains.** We strongly suggest adding a catch basin to a low spot while the yard is already open. Bundling these tasks is substantially cheaper than paying for two separate service visits. Plan the unified system once to lower the overall cost of a french drain OK project.
-   **Cleaning instead of replacing.** We sometimes find that a broken French drain is simply choked with mud. A professional 
    
    hydro-jetting cleanout
    
    [/drainage-repair-hydro-jetting/ →](/drainage-repair-hydro-jetting/)
    
     often restores full flow at a tiny fraction of a replacement bill. Always insist on a camera inspection before paying someone to dig up your yard.

## What an honest OKC quote looks like

A legitimate estimate from a real contractor should provide absolute clarity.

You should look for these specific line items:

1.  **Length and depth** of the planned trench.
2.  **Pipe and gravel specs**, such as Schedule 40 PVC, perforated, sock-wrapped, or specific gravel sizes.
3.  **Exit point** and discharge method, like a pop-up emitter or a curb fitting.
4.  **Restoration plan**, covering turf reseeding, mulch replacement, or concrete patching.
5.  **Total dollar amount** after the on-site evaluation.
6.  **Warranty terms** for both parts and labor.

We refuse to provide vague estimates. If a quote just says “$2,500 total, call to schedule” without detailing the materials, you should immediately push back. The final cost stays the same whether the builder tells you what is in it or not.

## Get a firm number

Pricing on any drainage system should be completely transparent and calculated per linear foot.

We provide free on-site evaluations across the OKC metro area. These appointments allow us to take physical measurements and quote firm numbers instead of vague ranges. 

Request yours here

[/contact/ →](/contact/)

 to get an exact french drain cost Oklahoma property owners can count on.

## Related Guides

### Signs You Need a Yard Drainage System

Soggy turf, eroding beds, a damp basement, mildew near the foundation — the signs your OKC yard needs drainage, and what an evaluation checks.

[Signs You Need a Yard Drainage System →](/guide/signs-you-need-yard-drainage/)

### Standing Water in Your Yard: Causes and Drainage Fixes

Why water sits in OKC yards — grading, clay soil, downspout runoff — and which drain fixes which cause. Free on-site evaluation.

[Standing Water in Your Yard: Causes and Drainage Fixes →](/guide/standing-water-in-yard/)

## Frequently Asked Questions

Why is an interior French drain so much more than an exterior?

Interior systems break and restore the basement slab, which is the most expensive part. They also typically require a sump basin and pump for the discharge. Exterior installs just trench through soil and pipe water to a gravity exit — fewer materials, less labor, faster.

What's a typical exterior French drain total for an Oklahoma home?

About $1,000 to $1,500 for a standard 80–120 foot residential run at $10–$15 per linear foot. Larger lots, longer exit runs, or concrete/landscape obstacles can push the total higher.

Why do French drain quotes vary so much between contractors?

Three things: length, depth, and obstacles. Two contractors looking at the same yard may see different trench routes (one short and shallow, one longer and deeper) and price accordingly. A real on-site evaluation is the only way to get an honest number.

## Get a free on-site drainage evaluation

Free across the OKC metro. We'll map your slope, soil, and exit points before quoting.

Get a Free Estimate

[/contact/ →](/contact/)

 

Call (405) 562-8461

[tel:+14055628461 →](tel:+14055628461)