Foundation, Crawlspace & Concrete Contractors in Renton, WA

Seth with TerraFirma came out to look at my problem. He wasn't able to help with my issue but was very friendly and helpful to guide me to who to call. Was on time for our meeting and gave me a call to let me know he was on the way. All in all I'm very happy with TerraFirma and Seth. Thank you!

They did a great job! They kept in touch throughout the entire work.

***Please note -- I updated my review from 1 to 5 stars. Terra Firma took the initiative to reach out 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.

We had a good experience with Terra Firma. We had 6 different estimates and went with their company because they did not try to sell us on something we didn’t need. After reviewing all the estimates, and talking to Bailey, the system design specialist, we realized that we did not need our foundation lifted to fix our sinking kitchen floor but instead, we needed stabilizing and lifting of the floor joist under our kitchen. TerraFirma also installed a new beam in our family room and lifted our settled concrete in our front walkway. They also buried a downspout which was draining into our front yard next to our walkway. Every Terra Firma employee who came to our house; Bailey, Jorge, Robert and the rest of their team, were on-time, polite and did their job efficiently. They answered our questions, kept us updated on the work they were doing and cleaned up after themselves. I would definitely recommend this company.

When we first bought our 1900s fixer upper, we had no idea what lurked behind the walls of the illegal basement apartment. Once we opened up the space we were in for quite the surprise. All the wooden post holding up the main beam of the house were rotted through at the base. You could stick a pencil through the old, soft wood. Working with TerraFirma to fix the issue was an easy choice. Eric came out to assess our problem. He was friendly and professional as he walked me through the process that was needed to fix our foundation. It wasn't going to be cheap. Don't expect this kind of work to be inexpensive (especially on older homes). We needed concrete to be cut, 2ft cubic footers poured, and six shiny new steel posts. (And while they were coming out anyway, we had them do seismic retrofitting too). There's all kinds of math and engineering that goes into determining what's needed to structurally support a home. TerraFirma handles it all. And they are experienced enough to know what it's going to cost. One of the best parts of working with them (besides the friendly employees and professional workers) is that the price they quote you is going to be the price. Full stop. There are no unexpected add ons at the end. I can sleep well at night knowing TerraFirma's work is holding up our home. A few months later when the rains started in earnest and our basement flooded (an issue we guessed had been going on for a while, hidden by those illegal apartment walls and leading to the rotting of the old wood posts) we knew who to call. Eric came out again to look at options for a sump pump system and even worked on adjusting those plans (while he was on winter vacation with his family!!) when we discovered that a third wall was seeping water and we needed a much larger amount of fixing than originally thought. We no longer have to worry during downpours. While our old fixer upper still needs a lot of work and love, we know that we are (literally) starting from a strong, solid foundation thanks to TerraFirma.

Seth came out to my house and was awesome! He was on time, polite and professional. The information was presented in a clear manner and helped us understand what our options were to achieve our house objectives. Definitely glad we had TerraFirma come out to give us a bid.

We've been working with RHD for over a year now. They are an awesome company to work with and all their customers have always spoke very highly of their product. Not many fabrication shops around can produce like these guys!

Charlie was our technician. He did a fantastic job, great with communication, and was VERY professional! Took before and after pictures and explained exactly what he completed! A++

Great; competitive price, installation went great, friendly and responsive staff in person and office. They made a drainage system for our crawl space with a sump pump.

Kudos to Riley, a TerraFirma System Design Specialist. Riley is a smart guy. Honest and communicative. He's focused on problem-solving instead of just selling products. You don't find that skill very often these days. I had an excellent experience getting a crawlspace encapsulation estimate from him.

Seth came out for an inspection of two buildings for me. He was incredibly thorough, patient, and kind. He explained every single detail and picture….totally honest about everything. I highly recommend Seth and the company.

Knowledgeable, polite and extremely efficient.