***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.

I contacted City Construction Solutions after discovering a water issue in my crawl space that had…read morecaused damage to several support posts. They came out and did a very thorough inspection of the entire crawl space, identified the source of the water problem, and documented several posts that had been damaged and rotted. They helped restore the water management system in the crawl space and completely replaced all of the damaged posts. I also really appreciated that they documented the work and provided photos after the project was completed so I could clearly see everything that had been done. I worked with Eric, Oleg, Sergey, and Lee throughout the process, and everyone was professional, knowledgeable, and easy to work with. I'm extremely happy with the service and the final result. I would definitely recommend City Construction Solutions to anyone dealing with crawl space or structural issues. 10/10 experience.

We had an extremely stressful experience working with this company on our foundation repair…read moreproject. The project caused enormous anxiety and depression for our family. Nearly 5 months after construction, our house still makes loud, concerning noises. Since construction began, many new cracks appeared throughout the house and old cracks became significantly wider. Floors shifted unevenly, causing basement flooring to pop up, tiles to lift, and grout to crack. After spending over $90,000, several areas of the foundation are still settled more than 3.5 inches. Initially, they told us they would lift the house to a practical level, but once work started they strongly discouraged lifting. Many risks and limitations were never disclosed during the inspection phase. By then, we had already spent tens of thousands on permits and deposits and could not realistically withdraw. After repeated insistence, they finally agreed to lift only the west section for an extra $1,500 to lift 3 piers, while the remaining 16 piers were stabilization only. During lifting, one hydraulic jack slipped off a pier, causing a massive bang that shook the house like an earthquake. Shortly afterward, we found a new foundation crack and existing cracks widened dramatically. The permit process was also a disaster. They ignored reviewer comments despite my reminders, causing extra review fees. Our permit alone cost nearly $5,000. Our foundation remained excavated and exposed for about 3 months before backfill due to polyurethane foam delivery delays and city concerns while we continued living in a dangerous construction site. Workmanship was poor and materials appeared substandard. Several piers were visibly installed crooked. We later hired two separate foundation repair companies to inspect the work after seeing so many new cracks, and both immediately pointed out that multiple piers were not installed straight. I suspect the cracking was caused either by improper pier angles or careless excavation planning. They excavated beneath all pier locations at once, including dangerous corner areas where excavations nearly met under the foundation. The drainage system was also poorly installed. Multiple caps were missing initially. Despite several promises to bring them later, they never did, so we bought and installed them ourselves. The drain lines contain standing water even during summer, with water levels nearly flush with the cleanouts, indicating improper slope and high clogging risk. One critical corner originally supposed to receive support coverage was ultimately left unsupported after a design change related to chimney removal, and they never informed us. That area had already been excavated for tieback installation and lacked vertical support. Had they communicated properly, we could have relocated a pier from a more stable section to support that corner. The steel parts used were raw iron with poor corrosion resistance. Heavy rust appeared on some piers within just two weeks. Costs were also far higher than represented: - Structural engineering was estimated below $3,500 but base cost alone was $4,500 plus about $1,000 per revision. - Geotechnical costs reached $6,500 plus $3,000 for special inspection. - Mid-construction they informed us of an additional $5,500 load testing fee (discounted from $7,000). Throughout the project they repeatedly demonstrated unfamiliarity with Seattle permitting and inspection processes, causing additional inspections and extra costs billed to us. At times it felt like we were paying for their tuition while our home was the experiment. This project caused severe financial, emotional, and structural damage to our home. Aware! Reviews are not all real! See my screenshot, gonna report to WACP!

I hired Groundworks to repair the foundation for my slowly sinking house. They were on time, on…read moreschedule, respectful and thorough communicating challenges and progress of their work. Very much appreciated their ability to change their approach where needed especially when it meant saving money, which they did!!! Thank you Sam, Yuri, and Ivan for your expertise and muscle and thanks to Brian and Groundworks staff for supporting me through this project.

Awful company. I got work done a year ago and decided not to leave a review however I'm STILL…read morehaving issues, so here goes. Original plan was not followed. I had to get all the way to a supervisor to get the crew to stop working. They did in fact need to change the design but never reviewed it with me. A third design had to be done and they still put the sump pump right in front of my hot water heater, they did not pitch the one side enough so water sits there, left my driveway full of small and large metal shavings (and I have 2 young kids and 2 dogs who run in the backyard), did not clean up other materials, did not remove the dirt they dug up in the basement (told me I had to pay extra, you would think for 24k it'd be included. They also went to dig up my patio to run the water line, which could have been adjusted a few feet to not dig up an entire patio- again, no one would listen until I spoke to that one supervisor again, it was unreal. There were multiple times they were scheduled to come and never showed or showed on a different day then was scheduled, at least 4 times, and the crew had no idea. Fast forward to my yearly inspection, where he recommended I get a dehumidifier, and I was confused bc I paid to get one (that was one of my main things before I got talked into upgrading to a 24k job). They NEVER installed the dehumidifier and there has been new mold growth. They were not forthcoming with pics but sent a crew to spray, the crew had no idea what they were spraying for. They finally installed the dehumidifier and now I'm waiting for them to return to fix the encapsulation which is pulling apart, for the thousands of dollars it was, it was not worth it. The entire job was not worth it (3 columns designed to hold up large buildings, used to hold up my tiny house), encapsulation, dug around the edges, put in a sump pump, and now the dehumidifier. I would NOT recommend!!!!

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.

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 love EVERYTHING about this company. Their catchy name. Their communication. Their…read moreresponsiveness and patience with my questions. (I'm very inquisitive!) Their willingness to accommodate my requests. The personalities of their employees, from their office staff to the one's who do the hard work. It's apparent that they've built a company based on honesty and integrity. There are larger companies who do foundation repairs, but I don't think there's another company who could have done a better job for us. Dave

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.

They were great in listening to our ideas, and giving us a quote. However, we ended up doing…read moresomething different with our driveway.

Jose and his team from Lara Concrete have done a few jobs for us including a foundation and floor…read morefor our garage, new front steps and porch, and finally a new driveway which is beautiful. Couldn't be happier with Jose, Lara Concrete, and the quality work that they've done for us. David S.

I had a late night emergency where water was gushing off from a dishwasher pipe…read more I called Trisha in the middle of the night (3am) and she was super kind and helpful. She understood the problem and helped me over the video call to isolate the problem, helped shut down water supply to dishwasher, stop the water damage and turn off water supply for rest of the house. She also looked up schedule and helped me plan inspection of outside sewer etc I highly recommend her and am grateful for her help to prevent water damage in my house. Any other company would easily have taken advantage of the situation and charged me thousands. Thank you Trisha for being a wonderful human being and for helping me out tonight.

I started working with Trisha years ago and she had been really great. Straightforward,…read morehardworking, fair, etc. She's had a few life events happen recently though and might be between a rock and a hard place. Hope things get better.