Had a large, obtrusive puddle forming in my driveway every time it rained, which would stay there…read morefor several days during the winter, and which was also blocking the pathway to my back door. Paul at Allied worked with me over the course of four months figuring out the best way to deal with the problem. The solution was a channel drain that would lead to my existing gutter drainage system. Because of the topography of my existing driveway, I assumed that there would still be a fair amount of puddling even after the drain was installed and that I would just have to live with it. In the days just after the install however, it rained quite a bit, and the drain worked pretty much perfectly. The puddling has been reduced by about 95%, and the water that does collect is shallow enough to handle easily. After the rain stops, the remains evaporate after a few hours. The small lake that I used to have to walk around is gone. The guys who did the install were professional and very courteous and Paul was very knowledgeable and patient in response to my many, many questions and emails leading up to the install. Would definitely recommend Allied for any project, large or small.

They responded quickly to my inquiry. They are very knowledgeable in what they do. We had a new…read morefrench drain installed. Worked was done in a day. Very professional.

We were very happy with the service that All Seasons provided. From the beginning to the end,…read moreeveryone we worked with was very professional and accommodating. Mike, who came out for the estimate, was very knowledgeable and had great suggestions for the work that needed to be done. Bradley and his crew were friendly, efficient, and did a fantastic job of cleaning up. There was some damage done to the pipes in the sprinkler system but All Seasons was very responsive in getting it fixed. Two Feathers came out and went above and beyond what was needed to be done to fix the issue. I would highly recommend All Seasons.

All seasons was excellent to work with on a recent job. We had a complicated foundation situation…read morecaused by a plumbing blockage, not water table rising and they were the only company to take the time to properly understand the cause of the issue, what really needed to be fixed, and how they could help. That meant we got to the right fix for my needs vs a one size fits all solution that would've been more expensive and added risk of future failure if sump pumps failed. Their on site work was also professional and efficient, which I appreciated.

Only time will tell how effective the repairs and improvements to our rather complex system of…read moredrains were, but Bryce certainly inspired confidence. He was always knowledgeable and demonstrative of what had been and needed to be done. Great guy to work with who actually does his work rather than the typical contractor bait and switch where the person who sells you on the job ultimately sends an inexperienced crew with no direct oversight. We felt in good hands!

Bryce and his team at Seattle Drain Service did a fantastic job diagnosing our 1940s downspout and…read moredrain system that had gotten clogged after rainstorms. They carefully figured various issues (broken pipe on one downspout, a piece of downspout logged in another pipe and remaining kinds clogged), carefully fixed the issues and then ran the pipes clean to ensure everything worked and no new issues cropped up. They were quick and neat and reasonably priced especially compared to other companies who quoted just a one fix of a pressure wash which in our case would have caused more damage. Will use again if needed and definitely recommend.

Well, folks - if you're looking for the masters of epoxy floors who would go above and beyond for…read morethe project AND you as a customer, look no further than Triad! Not only did they do the project - but they also noticed some blemishes on the garage walls and fixed those for free! Six months later, the floor still looks new! And - the project came out slightly cheaper than all these other big companies that pretend to be small family businesses. Attached are some floor pictures + the complete remodel project (with Elfa+ cabinets). Yaroslav and his team were fantastic - go Triad!

We hired them to remove our old carpet and install LVP throughout the house. They were punctual,…read moreprofessional and diligent with their work. They even made sure our floor was leveled and moved our appliances where needed, so thoughtful! Highly recommended!

Misha and Slavik came to day to finish up--too cold last week and snow... did a great job slab…read morejacking my garage floor...some final touches to make it look better... Very satisfied.... Professional, competent, and left the garage cleaner than when they arrived!! Highly recommend

They never performed the promised work, and never gave me a refund. They are no longer accredited…read moreby the Better Business Bureau, have changed their location to Woodinville. I'm guessing new reviews are phony. In 2025, they likely performed promised work, but not now.

***Please note -- I updated my review from 1 to 5 stars. Terra Firma took the initiative to reach…read moreout and assess any next steps needed to correct the problem. Trust is 100% restored knowing that if problems come up they will take any action needed to follow up. I will also say that the work they originally did was actually to code, and we agreed that the moisture problems arose due to the nonstandard setup of my dehumidifier, NOT because of errors in Terra Firma's work. Thank you Terra Firma.*** Unfortunately, I have to drop a negative review in the interest of warning other folks that their work has gone downhill. I previously had an excellent experience with Terra Firma for management of a water problem in my crawlspace. I hired them without question again for my current property for management of moisture issues, and I didn't check their work upon completion as thoroughly as I should have. Unfortunately, about 1 - 2 months after completion of work, I discovered a large mushroom growing out of one of the structural posts in my crawl/basement. On closer inspection, I noticed that the dehumidifier water discharge line they installed was dumping less than a foot away from my foundation, corresponding to the exact spot the mushroom was growing. Moisture was the exact problem they were supposed to fix, but now they have created a severe structural problem secondary to moisture with the dehumidifier line dumping large quantities of water right next to my foundation. In other words, they created the exact issue they were purporting to fix by collecting the moisture and depositing it into my foundation. Once fruiting bodies are growing out of wood, this is an indicator that the wood is severely compromised and the fungus network has grown extensively. I now have a very expensive and serious problem to fix. I called to let them know about the problem, not sure if I will hear back from the coordinator/ the team who did the work. I am not sure if I would trust them to fix the issue after the damage they have caused, but I would accept financial remediation. If they take steps to make things right, I would update my review. I would not hire Terra Firma again for any crawlspace work, be it structural or moisture related because of the big problem they have caused. Again, just would like to warn others.

DISCLAIMER: I did not use their installation or repair services. This review is about their…read moreestimation process and sales tactics. Their tech, Noah, was pushy with his proposals. He wasted time by having me watch a video of their process, and attempted to get me to agree to a proposal the day of - estimates running in the $15k-$50k ranges. Their estimates came in higher than their competitors by about $5k including Groundworks. When I informed him that I would not be using their services, he replied with, "What are your plans for your sagging floors? How do you plan to address this?" I have met with many contractors on this same issue, and no one else aside from Groundworks and TerraFirma has attempted to blow our issues out of proportion. However, Noah did offer to do a side by side comparison of the other offers with his, which I did not take. I ungraciously assumed it wouldn't have been attempt to price match, but to take another opportunity to push me more on his proposals. Don't use them, if you want to avoid fear mongering and overpriced services.

Thomas at Wu Construction was wonderful to work with. I was the buyer's agent on a transaction…read morewhere he had completed post repairs under the house for the seller. After closing, we asked him to take a look at a couple of posts that were touching the soil. Even though this was not part of the original scope of work, he went ahead and replaced those, along with a few others they found needed attention. That kind of good faith and professionalism was truly appreciated. Thank you, Thomas. Your integrity and willingness to go the extra mile did not go unnoticed. I would definitely reach out to them in the future.

We had a major basement drain line failure, causing significant flooding. Wu Construction…read moreexcavated and repaired the failed drain line and also installed a new sump pump. Everything is working great now. This was a very hard job and the crew did excellent work! We truly appreciate a company that takes pride in its work. Thank you!!

They provided an estimate quite quickly and came out to do the work just a few days later. They did…read morea great job, it didn't cost more than we had been told and their communication was clear and concise.

We had pest and ant problems in a 1930's home we recently purchased. It had been vacant for some…read moretime. Part of the solution was to redo the crawl space. Andy Construction gave us a very reasonable quote for removing what was there and installing the vapor barriers, replacing spotty floor insulation, sealing cracks and new access doors. The crew was courteous, on time, and left no mess. We haven't seen a mouse since and the ants are getting under control. Our floors and home are so much warmer! We heartily recommend Andy's Construction.

Sorry guys, I waited too long to write a review. Trayton, Ryan, and Laura do exceptional work. I…read moredon't want to get too wordy about the job, but it was a complicated garage floor with the discovery of an underground spring. It was looking bad and Ryan was standing next to me and said "we're gonna win this one". Just the kind of attitude needed with a difficult job. They were on time, efficient, clean, and worked extremely hard. In addition, they're just a really nice crew to work with. Oh yeah, they won.

I had these guys do some extensive work in my crawl space. I thought the price was more than fair,…read moreand looked great. They took great care in keeping everything clean while walking thru my house. I highly recommend them over the other companies to choose from.

My sump pump alarm was chirping, and Revy, the Owner contacted me. He was very nice and respectful…read more He was very informative and patient as I explained my situation. He didn't want me to worry as he wanted his guys to check it out first. He gave me a verbal quote on an AC pump that turned out to be much cheaper than two other companies that I had contacted. Two of his techs came over and both were very polite and professional. They checked out both my sump pumps and both were doing well however, one only needed a battery in the alarm. This company has integrity and is legitimate. I will be using them in the future to replace any sump pumps issues and I found out they also clean the drains for my perimeter floor drain system in my basement. I would not hesitate using this company.

There was a leak coming from my deck that went into my kitchen. I had several contractors check it…read moreout but no one could diagnose the issue until Waterproofing Specialists. They found where the leak was, which was underneath my slide door, and replaced the door itself. They also took care of some rotted wood underneath and resealed everything. They also re-waterproofed the entire deck and did such a great job. I highly recommend them.