Allied Waterproofing & Drainage

★★★★★ 4.9 / 5 (52)
Emergency Call


: Seattle, WA 98101
: (206) 624-7333
: http://www.alliedwaterproof.com

Company Overview

Founded in 1990, Allied Waterproofing and Drainage has provided high-quality drainage and waterproofing solutions across the Pacific Northwest for more than twenty years, adhering to the same core principles from the start: superior quality, trustworthiness, ethical practices, and reliability.

Since 1990, Allied Waterproofing & Drainage has built a strong reputation for delivering skilled workmanship and budget-friendly services across a range of drainage, waterproofing challenges, sewer line and water pipe replacement.

We continue to operate today with the foundational values we established from our humble beginnings: Excellence, Honesty, Ethical practices, and Reliability.

Business Services

  • Drain installation
  • Drain repair
  • Foundation construction
  • Foundation repair
  • Moisture or vapor barrier installation
  • Moisture control inspection
  • Moisture control installation
  • Moisture control repair
  • Plumbing inspection
  • Plumbing installation or replacement
  • Plumbing repair
  • Sewer installation
  • Sewer repair
  • Sump pump installation
  • Sump pump repair
  • Water pipe installation
  • Water pipe repair
  • Waterproofing inspection
  • Waterproofing installation
  • Waterproofing repair

Business Location & Hours



Mon:8:00 AM - 5:00 PM
Tue:8:00 AM - 5:00 PM
Wed:8:00 AM - 5:00 PM
Thu:8:00 AM - 5:00 PM
Fri:8:00 AM - 5:00 PM
Sat:Closed
Sun:Closed

Recommended Customer Reviews

John C.
★★★★★

I selected Allied Waterproofing and Drainage from several companies that submitted bids for our job (lining our 60-year old sewer connection). Paul gave us the most competitive bid and the background research showed them to be a very reliable company.

Paul provided reminders of the upcoming day when the work would be started and they started when they said they would. The work included a fairly deep excavation in our front yard but things progressed steadily and it was completed within a few days. The landscaping, driveway, and rockery were returned to as-before conditions with an additional cleanout added for future access.

Overall, I was very pleased with the work of Paul and his crew and would highly recommend them for your jobs.

Chen C.
★★★★☆

the estimator Paul was so professional and impressive, I really wanted to hire them but just cannot afford the price right now, wish I have more money!

Paul's estimate was very detailed and thorough, he listens to clients needs and addresses clients concerns, I am sure their work has high standard too, if money is not a concern I would definitely choose Paul's proposal

sammick d.
★★★★★

These guys replaced our 100plus year old sewer, I can't say enough about them. They were hardworking, super nice, and did a wonderful job
I highly recommend them.

Jeff T.
★★★★★

I recently sold a home in Seattle. Like many homes in the Green Lake neighborhood, it was built in the 20's. We found out the hard way that there are a lot of issues with the old sewer lines. When our buyers scoped the sewer line some significant damage was discovered so we had no choice but to repair it to make the sale go through. I did my due diligence. I received four bids from all the most notable sewer repair companies in the area.

Not only was Paul's quote literally THOUSANDS lower than the other three, it was by far the most professional experience I had. The others ranged from handing me a business card with an ""estimated cost"" scribbled on the back to verbal quotes. I felt like I was being taken for a ride with the others and I now understand why plumbing a sewer repair companies can have bad reputations. I felt like I invited three used car salesmen into my home to fix my sewer! It was pretty clear to me that once the other companies started the work they were going to begin tacking on additional repair costs because they made no commitment to the final total.

Paul was upfront from the beginning about what the damage was and exactly how he'd repair it, which was really refreshing. He replaced our entire sewer line that ran under a sidewalk and a retaining wall with landscaping as well as our driveway. If you saw it now you'd never know anything ever happened. His crew was professional, courteous, and punctual. I'd recommend them to anyone in need of a repair.

Melissa A.
★★★★★

Paul came out to give us a bid for a french drain and sump pump for our basement and garage. We ended up going with a different company due to the price being just a little lower, and the start date was sooner. However, I just wanted to share that I had a great experience with this company. Very professional and honest with good prices. The scheduling was handled great via phone and email (compared to another company that didn't even show up or call), and Paul showed up on time. Early even, which was great for me. He had great ideas and solutions for all of our drainage issues, including things we'll need to do in the future. He was honest about what we should do, and what would be a waste of money. And the price for the job was fair and competitive.

Aimee C.
★★★★★

I was impressed with the straight forward, educational bidding process. Paul was very knowledgable and the price was fair.

Project started and finished on time. The crew was extremely conscientious around the house. They protected my floors and furniture and left the place looking better than when they started. They were efficient and each day I was impressed with the amount of work they got done. The workmanship is top notch.

I would not hesitate to recommend this company!

Donald S.
★★★★★

We were so pleased with the work from Allied Waterproofing. We had a leak in our waterline between the meter and our house. Allied gave us a great bid, they came on time, and completed the job on time and on budget. Their workman were professional and helpful. The work was pretty extensive, and they always arrived at the exact time they said they would. If they were going to be 15 minutes late, you received a call from the company. I would use Allied again and would highly recommend their services.
don schultz
Stanwood, WA

Adrianne H.
★★★★★

Paul & his crew at Allied have done a great job with waterproofing and drainage in and around our 100 year old home. We are very happy with the work (which is guaranteed) and found the cost to be competitive and fair. I will continue to recommend Allied Waterproofing to anyone that has drainage and water issues.

Rick W.
★★★★★

I wish I could give more than 5 stars.

We have dealt with a wet side yard for a number of years always thinking we'll get it corrected some day, even after having water come through the garage a couple of times and buying a sump for the low spots to use during very rainy times (which sometimes meant middle of the night pumpings). I know, stupid huh? Always thought it would take a major drainage procedure to move dirt around to have the water drain elsewhere etc.

Finally had to bite the bullet. Checked on yelp and found these guys. They gave a quick estimate and had available time within a couple weeks. Instead of major dirt moving, they showed us where they could just go down from the lowest spot and pipe to the catch basin in the street. Paul had guys out when he said, two guys put in a couple of hard days digging by hand (as all house electricity, cable and gas were in the same area), through hard pan, down a couple feet, put in everything they needed along with some cement work and completed in two days. I could not believe when my wife called me at work to tell me it was done so fast. And it works fantastically. Our first hard rain, we had to check it out and sure enough, worked like a champ.

Paul was a great guy to work with, and always kept us in the know of how things were going. Please give these guys your business, you won't be sorry.

Ruslana S.
★★★★★

I have just finished my project and was very happy with how everything played out.

It took a while to get Paul to come out (I called during mansoon season, so everyone had a leaky basement), but once he showed up his estimate was lower than 2 other contractors.

I had to reschedule my project 2 times, because of some family issues and every time Paul was veru flexible and patient.

Project completed ahead of schedule, which is unheard of (I have been dealing with contractors for a while now, so I know from expirience)

Overall I am very happy with the result, hiring Allied was a right choice for me.

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