How Much Do Whole House Drainage Systems Cost?
If you’ve been dealing with water pooling around your house, damp spots in the basement, or soggy patches in your yard, you’ve probably looked into drainage solutions.
The big question most homeowners ask is how much does a house drainage system cost?
The short answer is that it depends on the type of system, your home size, soil conditions, and even where you live.
The long answer is what we’re going to cover here, so you’ll have a clear picture of what might be ahead if you decide to take on this project.
Whole House Drainage Systems Costs
Whole house drainage systems can range anywhere from $5000 for simple setups to $25,000 for bigger, more complex installs.
On the low end, you might see quotes around $4,000 to $6,000 for a small yard drainage project or a basic French drain. On the higher side, you could be looking at $25,000 or more if you need a full perimeter system with sump pumps, waterproofing, and heavy excavation.
Here’s a quick breakdown:
- Basic yard drainage (surface water only): $3,000 – $8,000
- Interior French drain with sump pump: $8,000 – $15,000
- Exterior perimeter drain with restoration: $10,000 – $20,000
- Full whole-house system (interior + exterior + pumps + coatings): $20,000 – $30,000+
The big reason for the wide range is that not all homes have the same drainage issues.
One person might just need to redirect rainwater away from their foundation, while someone else has a basement that floods every time there’s a storm.

Also Read: Sump Pump Installation Costs
Naturally, those situations call for very different fixes and budgets.
Our Whole House Drainage System Prices
Our full-home drainage systems generally range from $5,000 up to $25,000. This is a complete solution designed to keep water away from your foundation and protect your property long-term.
Here’s what’s included in our drainage system installations:
- Full excavation and installation of the drainage system
- High-quality drainage pipe and fittings
- Proper grading to direct water flow
- Rock backfill and premium drainage fabric for durability
- Clean-up and restoration of the work area
This gives you a turnkey system that’s built to last and keep your home protected from water issues.
What Affects The Cost Of A Whole House Drainage System?
Here are some of the biggest things that will affect your whole house drainage system cost:
#1. Type Of System Installed
The type of drainage system makes the biggest impact.
A simple French drain that’s dug in the yard costs a lot less than an interior basement drain with sump pumps and waterproof coatings.
Exterior drains are often less disruptive but can involve heavy equipment and landscaping restoration. Interior drains may mean tearing up concrete, adding pumps, and putting everything back together. Each type comes with its own set of costs.
For example, a yard French drain might only run you $10 to $35 per linear foot, while an interior perimeter drain can cost $40 to $85 per foot.
When you add it all up, that’s thousands of dollars’ difference depending on which route you go.
Also Read: How Much Does A French Drain Cost In Florida?
#2. Home Size
The bigger the house, the bigger the cost of whole house drainage systems.
Why? Because larger homes often mean more linear feet of pipe, more trenching, and more time for the crew.
For example, a small ranch with 100 feet of drain needed will obviously cost less than a large two-story with 250 feet around the foundation.
If your yard is wide and flat, you might also need extra channels or dry wells to make the system work well.
#3. Soil Conditions
Soil conditions also affect how much a whole house drainage system costs.
If you live in an area with soft sandy soil, the digging goes quickly and the water drains more easily. That usually lowers the cost.
On the other hand, clay soil holds onto water and requires more gravel or deeper trenches to get results. Rocky soil is another headache since it slows down excavation and wears out equipment.

All of that means extra labor, which leads to higher costs.
Think of it like this: contractors can dig a trench in sandy soil in a couple of hours. The same trench in packed clay might take twice as long. You’re paying for that time.
Also Read: Yard Drainage Solutions: DIY Vs. Hiring Pros
#4. Water Problems
The more severe your water problems, the more complex your drainage system has to be.
A yard that gets soggy for a day or two after a storm might only need surface drains or a shallow French drain. That’s a relatively small job.
But if you’ve got standing water around the foundation, or a basement that floods regularly, your contractor will recommend a full perimeter system inside or outside the basement walls.
These setups might include sump pumps, backup pumps, moisture barriers, and even wall coatings.
Every layer adds thousands to the total cost.
#5. Interior Vs. Exterior Work
Interior and exterior drainage systems are both effective, but they affect costs in different ways.
Interior systems require breaking up basement floors, laying drain tile, and then re-pouring concrete. It’s messy and labor-intensive, but it doesn’t disturb your yard.
Exterior systems often involve digging around the foundation, which may require removing decks, patios, or landscaping.
That means you’ll pay for excavation and then pay again to restore everything after.
So, depending on the setup of your property, one option might be more practical, but also more expensive.
Also Read: Ways to Waterproof An Exterior Wall
#6. Labor Rates
Labor rates vary wildly across the country, and they make a huge difference in final pricing.
In smaller towns or rural areas, you might find rates as low as $50 per hour for excavation and drainage crews. In metro areas, $100 – $150 per hour isn’t unusual.
On a project that takes 100 – 200 hours, that’s a $5K – $10K swing just based on location.
It’s not only about hourly rates, though. Crew size matters too. A two-man crew will take longer than a six-man crew, and if your soil or foundation makes work tricky, the job stretches out.
#7. Permits And Local Codes
Permits can feel like small line items, but they add up.
Simple residential drainage permits might only be $200 – $500. But in cities with stricter stormwater management rules, permits can easily cross $1,500 – $2,000 once inspections are included.
Then there are codes. Some municipalities won’t allow you to discharge water into the street or storm drains, so you may need dry wells or underground dispersal systems instead. Others require specific types of pipe, like rigid PVC instead of flexible corrugated.
That bumps up material costs.
Local inspectors may also require staged inspections, which means scheduling delays and added labor.
Bottom Line
Whole house drainage systems aren’t cheap, but they’ll save you a lot of money down the road.
If you’re only dealing with minor surface water, expect to spend a few thousand dollars. For more serious basement or foundation problems, $10K – $20K is common.
And if you’re looking at a full house drainage system with both interior and exterior solutions, plus pumps and waterproofing, $20K – $30K isn’t unusual.
The smartest step is to get a few quotes from local contractors.
Ask them to explain the type of system they’re recommending, how it addresses your specific water problems, and what’s included in the cost.