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French Drain Installation in Bellevue, WA | NDS-Certified Professionals

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Real Customer Reviews:

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Anne Erickson profile picture
Anne Erickson
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We used them to help with a rock well for our sump pump and they were quick, affordable, very communicative, and professional! I would use them again in the future if I needed them!
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Carr Onstott profile picture
Carr Onstott
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Just had a set of french drains and new downspout drains installed and we couldn't be happier with the work. The owner was very responsive and helpful. We called on a Thursday afternoon after seeing some water in our basement and he came right out that evening and got started the very next morning. They did an excellent job cleaning up after themselves every day and even helped me out with a few minor touch ups. Would absolutely recommend them to anyone else needing some work done.
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Tanya Nadkarni profile picture
Tanya Nadkarni
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They were very responsive and came by and provided a reasonable estimate quickly. They waterproofed my basement (had a mold issue which prompted me to reach out to them) and I haven’t had any issues so far. Worked fast and explained clearly what needed to be done.
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Kyle Karpack profile picture
Kyle Karpack
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Vlad and the Basement Expert team did a fantastic job installing a complete perimeter drain and waterproofing system in our unfinished basement. We appreciated that they were timely, clean, clear communicators, and most of all, that they did excellent work. Our project was challenging, but they were ready to tackle everything that came up including plumbing changes and having to trench around a large boulder, without any unexpected costs on our side. From the start, Vlad’s evaluation of our project was honest and thorough, and they were transparent with pricing and the scope of work. The pricing was competitive and we felt that their team went above and beyond with their excellent workmanship and attention to detail. Throughout the project, they explained what they were doing and consistently made great decisions. For anyone needing a sump pump, french drain, or other basement waterproofing services, I’d recommend Basement Expert without any hesitation!
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Eva Papp profile picture
Eva Papp
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Vlad of Basement Expert Waterproofing recently diagnosed my basement leak issue. He came with scopes and moisture readers, and was able to not only verify the condition of work I had done previously with another company, but suggest what a reasonable fix would be. He came out the day after I called, and while we had planned to do the job the following week, he was able to complete the job the same day when space opened up in his schedule. I can’t believe it. In the midst of rainy season I got a same day fix with a new rock well and diversion system. These guys are honest, professional, timely, and cost effective. Total pleasure working with them, and they will for sure be the first ones I call if ever I need this type of service again. Thanks Vlad and crew.
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Daniel Gus Schreiner profile picture
Daniel Gus Schreiner
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We highly recommend Basement Expert. Being new to the area we talked with a lot of companies about waterproofing and other house projects and we were initially impressed with Basement expert's clear communication and they didn't seem like they were trying to sell us something we didn't need. After hiring them, the clear communication continued and we found them to have integrity and take pride in their work. They were also very clear and fair about pricing and definitely earned our trust. We can now rest easy when there is heavy rain knowing that their work is protecting our home and the money we have put into our other improvements!
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Sam Wu profile picture
Sam Wu
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Very responsive and professional! They came out and fixed my foundation crack the very next day after giving a competitive price.
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Ryan Johnson profile picture
Ryan Johnson
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They are knowledgeable, showed up consistently, and provided updates when unexpected obstacles came along. We have a tricky foundation at the base of a wet hill with poor access and they built complete foundation and runoff drain systems in less than 2 weeks.
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Jordan profile picture
Jordan
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I had them add French drains and a channel drain to our basement because water was getting in from the garage and the walls. They did a great job covering the old catch basin in the driveway, adding French drains, and tying our gutter into the new channel drain line. Excellent work, great communication through the entire process, and real integrity. After it was finished, I noticed that the garage door wasn't closing because they had raised the level of concrete. Serhii was out first thing on Monday to fix it, and while he was here he noticed that some of the extra strong concrete they installed in the garage entryway wasn't drying like it was supposed because it's the rainy season. So he had Anatole come out the same day to remove it and install more quick drying concrete. That kind of service and response time is hard to find with contractors. The only thing I wish that was slightly different about the install is that the dimple board (moisture catching fabric on the walls) came out a bit wavy which will make it look pretty bad if we want to paint over it. So we'll probably put up drywall in the basement to cover it, but sadly that will reduce the amount of usable space. I'm not sure if that issue is even something that other contractors could avoid. And in all other respects, they did a fantastic job and we're very pleased. Hasn't been a big rain to test out the new system, but it sure looks solid. Would happily recommend.
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Byron Kwan profile picture
Byron Kwan
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We called Basement Expert to come out and take a look at an overflowing gutter drain pipe that was causing water to pool near our foundation during heavy rain. They were very responsive and professional and Vlad and his team were able to come out the next day. When they arrived, they scoped our underground drain pipe and found no issue, but they did note that the gutter itself was not installed correctly and that the adapter from downspout to drain pipe needed replacing. They went to grab supplies and came back right away to fix it. They also didn't charge us for the work because it was a small fix! I was super impressed with their work ethic, attention to detail, and willingness to help us for free. I would recommend anyone to give them a call if you think they could help you out!
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Expert French Drain Installation in Bellevue, WA

Need the method first? Our main drain installation page walks through how we build these systems across the metro.

French drain installationWater sheeting down a slope into the back yard, a soggy strip along the foundation, or a damp line at the bottom of a finished basement wall: those are the calls we get most from the Eastside. Basement Expert handles French drain installation in Bellevue after an inspection that traces the water to its source, then builds a drain sized to carry it somewhere safe.

Slopes, Retaining Walls and Uphill Neighbors

Many lots here are cut into hillsides, so groundwater from uphill properties moves through the soil and surfaces against the house or behind a retaining wall. A curtain drain across the slope intercepts that water before it reaches the foundation. Retaining walls built without drainage behind them often lean or weep; adding a drain line with clean rock at the base relieves the pressure.

Curtain Drain, Footing Drain or Interior System?

French drain in BellevueThe right system depends on where the water enters:

  • Curtain drain: a shallow trench across the yard that catches water moving downhill.
  • Footing drain: pipe beside the footing that relieves pressure on the basement walls, usually paired with exterior wall work.
  • Interior perimeter drain: a channel under the slab along the inside of the walls, tied to a sump basin.

Roof water never goes into any of them. Downspouts get their own solid pipe to discharge.

Finished Basements and Tight Side Yards

When the outside is blocked by a patio, a narrow side yard or the property line, we work from inside. We protect finishes, cut a strip of slab along the wall, set pipe next to the footing and run it to a sump. A dimple membrane on the wall guides seepage into the channel, and the slab is patched flush so flooring can go back down.

Commercial Properties and Parking Areas

For commercial sites, paved lots and loading areas shed a lot of water fast. We look at catch basin capacity, where runoff concentrates, and whether the existing storm connection can take more flow, then put the drain layout on a drawing before work starts.

What Does Drain Installation Cost in Bellevue, WA?

We price after the site visit because two lots on the same street can need very different systems. Slope, soil, depth to the footing, hardscape in the way and the distance to a legal discharge point all change the scope.

The basic prices for installing a French drainage system in our company ranges from $50 to $250 per linear foot.

Before You Book a Drain Inspection

A few answers to questions homeowners ask on the phone.

Usually, yes. A curtain drain along the uphill side of your yard catches groundwater moving through the soil and sends it to a discharge point on your property. We check the outlet options first, because the water has to go somewhere legal.
We keep the trench as narrow as the pipe and rock allow, set sod and plants aside where we can, and backfill to grade. Expect some bed and lawn repair along the trench line, and we’ll point out anything that has to come out before we start.
The prices for the installation of this drainage system in our company starting from $50 and can go up to $250 per linear foot, including consumables. We give you the exact number after an on-site inspection and a written scope.
In most basements, yes. An interior drain collects water under the slab, and a sump basin is where it ends up before the pump sends it outside. If the lot allows a gravity outlet, we’ll tell you.

Our Service Area

We work across Bellevue, WA and these zip codes (98004, 98005, 98006, 98007, 98008, 98009).

Nearby drainage pages: Everett, Marysville, and our yard drainage guide for this area.

More reading on drainage

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