Concrete Raising & Leveling

Garage Floors

Seattle Garage Floor Re-Leveling

1-866-SLABJACK provides garage re-leveling and concrete raising services in the Puget Sound. The process of fixing your garage floors is a clean, simple procedure accomplished without expensive excavation or slab removal, and is usually completed in just one day. Level off floors, sinking and broken corners, eliminate cracks and restore your garage to a fresh new look. If you have noticed that your garage floors may be sloping or sunken – give our experts a call or schedule a free estimate here on our website. We provide local services to Seattle, Bellevue, Tacoma, Bothell, Redmond, Everett and beyond.

 

Why Is My Garage Floor Sinking?

Garage floor settling is one of the most common concrete problems homeowners face in the Pacific Northwest — and it's almost always a soil problem, not a concrete problem. The most frequent causes include:

Soil erosion and washout. Heavy rainfall (something we know well in the Puget Sound) gradually washes away the compacted fill beneath your slab, creating voids that allow the concrete to drop.

Poor original compaction. Many garage slabs were poured over fill soil that was never properly compacted. Over time, that material shifts and settles under the weight of vehicles and foot traffic.

Tree root activity. Roots that grow beneath a slab and then die or are removed can leave significant underground voids.

Freeze-thaw cycles. Seasonal temperature swings cause soil to expand and contract, slowly displacing the material supporting your slab.

Whatever the cause, the result is the same — an uneven, potentially hazardous garage floor that gets worse the longer it's ignored. Early action is almost always less expensive than waiting.


How Does Garage Floor Slabjacking Work?

Slabjacking (also called concrete lifting or mud jacking) is a proven, minimally invasive technique for raising a sunken concrete slab back to its original position. Here's what the process looks like when our crew arrives at your home:

  1. Inspection and mapping. Our technicians identify the low spots, voids, and areas of instability across your garage floor.
  2. Strategic drilling. Small holes — typically the size of a golf ball — are drilled through the slab at carefully chosen injection points.
  3. Material injection. We pump a high-density polyurethane foam beneath the slab. The foam expands to fill voids, compacts loose soil, and lifts the concrete back into place with precision.
  4. Leveling and verification. Our team monitors the lift in real time to ensure proper, even elevation across the entire floor.
  5. Hole patching and cleanup. Injection holes are patched, the work area is cleaned, and your garage is ready to use again — usually within a few hours.

The entire process is completed without heavy excavation equipment, no concrete removal, and minimal disruption to your daily routine.


Polyurethane Foam vs. Traditional Mudjacking for Garage Floors

Not all slabjacking is the same. At 1-866-SLABJACK, we use polyurethane foam injection rather than traditional cement-based mudjacking slurry — and there are good reasons for that.

Polyurethane foam is lightweight (traditional mudjacking material can actually add significant weight to already-stressed soil), cures in minutes rather than days, and won't wash out or erode under the slab the way a slurry mix can over time. It's also cleaner, requires smaller injection holes, and provides a longer-lasting result.

For garage floors specifically — where vehicles are parking and the slab bears constant load — polyurethane is the better long-term investment. Learn more about Polyurethane vs. Mudjacking.

Before and After
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  • Can’t rave enough about Slabjack. Our experience with them was top notch start to finish. They are incredibly timely and professional with their communication and the crew that came out (Steven, Donny, and Justin) were all very kind and hardworking. They did a careful and beautiful job lifting our brick porch and back patio slabs. They answered all our questions and left everything clean and looking fantastic. Highly recommend this company, worth every penny!!
    Kiki in Bellingham
  • Everything, from initial inspection, scheduling, timeliness, interactions, repair, and cleanup was top notch. Very professional and friendly at all stages. The crew raised the sunken slab and cleaned up in less than an hour.
    Rick in Snohomish
  • Terrific communication by phone, texts and email. Estimate was thorough and speedy. The crew who did the actual work were just the best bunch of guys! They were fast and efficient, and they made the experience educational for me which I appreciated very much. I’m sorry I only had one sunken driveway for them to fix! 10/10 recommend.
    Mary in Bothell
  • The crew from Slabjack did a great job leveling my cement sidewalk and repairing the cracks. The were quick, clean and professional. I would heartily recommend them.
    Carol in Puyallup
  • I had Slabjack come out and raise a sidewalk, support some concrete steps and an addition that was poorly constructed. The crew did a great job. They were polite, cleaned up after themselves, and the quality of the work was great. I thought the price matched the work provided. I wouldn't hesitate to use them again.
    Lars in Seattle
  • Technician was very friendly and appeared proficient and cleaned up. great experience.
    Tracy in Everett
  • I bought a house and the walkway had sunken down by a couple inches. Slabjack NW was super quick on getting back to me, doing a quote and raising the walkway. After the work was done, I had a question about the height of the walkway in one corner. They came back out within a week and raised that portion even further. This company was great to work with and I wouldn't hesitate to recommend them to any and everyone! Thank you Slabjack NW!!!
    Michael in Seattle
  • Working with slabjack was easy, pleasant and seamless. Matt, Kristina and Eddy were all thoughtful, friendly and helpful throughout the process. I’m really happy with the work and the customer service. Thank you for making it a great experience.
    Audrey in Seattle
  • The crew that came out to fill a void under our front porch were excellent. They got here on time, were quick with the work and were very polite and tolerant of our dog.
    Cindy in Seattle
  • A very professional experience from start to finish. Knowledge people who took the time to plan how to fix our sinking and sliding concrete patio. Job well done. Would strongly recommend them!
    Rachelle in Silverdale
  • Organized, on time, did a great job and cleaned up well. Overall a great experience!
    Charles in Tacoma
  • The crew was prompt, friendly & professional.
    Elden in Bellevue
  • Organized, on time, did a great job and cleaned up well. Overall a great experience!
    Charles in Tacoma
  • The crew was prompt, friendly & professional.
    Elden in Bellevue
  • The employees were on time, considerate and efficient. The project was done completely to our satisfaction and the work was explained as it was done. Fully satisfied.
    Nick in Bellevue
  • I had settling under my sidewalk with possibility of the settling also under the garage. The SLABJACK team successfully filled the void under the sidewalk and verified the garage did not have any voids.
    Robert in Belfair
  • Professional, thorough and mindful of the details. And they gave thoughtful answers to my questions. Excellent work.
    Richard in Bothell
  • We are very pleased with final product and the professional treatment along each step leading up to and after the repair!
    Glenn in Woodinville
  • The Slabjack crew came and repaired a set of sunken concrete stairs and patio pad. They did a great job - arrived on time, were friendly and professional, did the work efficiently (clearly knew what they were doing) and even took a moment to love on the dog. My patio stairs are now back where they're supposed to be. I'm really happy with the result.
    Barbara in Kent
  • It was a pleasure working with Slabjack. Chris Whalen was clear and concise in explaining what we had to do to prep for the work and how he would raise the concrete floor and patio. He honored the estimate we already had for the work, and the office was also easy to work with to arrange the date, time and payment.
    Raul in Seattle
  • Called SlabJack for a sinking concrete slab that my tile floors are installed over (causing cracking and breaking tile). The bidder was professional, knowledgeable and on time. The work started on time, the guys were professional and friendly and thorough. Very pleased and would recommend them to anyone needing their services.
    Matthew in Seattle
  • Great service, installers showed up on time and did a great job. I didn’t have any additional crack due to the drilling which I thought I would. Very nice work and within my original quote.
    Betty in Bothell
  • The porch and steps are back inline like they should be and look very nice. Good job!
    Naomi in Snohomish
  • Everyone was pleasant to deal with, kept contact, and answered questions. The workers were on time, listened to my concern, and assured me they would do everything possible to solve it, which so far it appears they did.
    Allan in Kirkland
  • The crew actually arrived earlier than planned. This is extremely rare when working with contractors. They were very professional and courteous. Before any work was done the crew made sure i knew exactly what was going to be done and what expectations i should have. I was briefed on several possible outcomes of the service. When they were done the work site was completely cleaned up, even cleaner than when they arrived. I will definitely call on Slabjack again for any similar work i need.
    Leo in Poulsbo
  • Slapjack crew did a great job on our patio. They were responsive to feedback and followed through very well
    Amal in Seattle
  • We contemplated doing this for about 8 months! We had a dip on one side of the garage floor that was about 3". After all the research and cost comparison to jack hammer and re-pour a new garage floor, we finally decide to move forward with Slab Jack. Why didn't we do this 8 months ago? The team came on time, answered question I had and I watched them throughout the whole process. They were careful, efficient and cleaned up (all within an hour). Thank you Slab Jack team!
    Cindy in Seattle
  • Came right on time, did a simply OUTSTANDING job of raising some sunken pieces of driveway. Recommended a local expert to deal with cracks - saved me the cost of putting in a new driveway ten times over! Highly recommended.
    Dennis in Woodinville
  • Slabjack NW is a great service, I would recommend. Tim Freeburg was very helpful. He examined the walkway in person, came up with a couple options, and gave us clear info so we knew what to expect. The quote was 100% accurate and the installers completed the job quickly and thoroughly even though there was more erosion than we guessed under the concrete. They also make scheduling and payment very easy.
    Amy in Renton
  • Slabjack was super to work with, from the first call to schedule a free consultation to the project being completed. All employees were friendly and helpful, service was on time as scheduled. I would definitely recommend Slabjack.
    Pam in Coupeville
  • The whole Slabjack crew were very responsive and professional from the moment I called for an estimate to the day the truck arrived to level out my driveway and garage floor that had sunken. I had not used this kind of service before and they accomodated all my questions.
    Todd in Redmond
  • We hired Slabjack to raise and support several concrete slab areas (about 9 panels) over our 150ft. driveway by drilling holes, pumping the polyurethane foam underneath the slab areas, which raises the slab to make it smooth throughout. Slabs that didn't even out exactly were ground down to uniform edges. Our cars have a smooth drive in and out of the garage and our grandchildren will be able to run up and down without tripping over the 1-2 inch elevations. The three workers had great attitudes and were helpful in explanations and further suggestions. The foreman was very knowledgeable and also helped taper the entrance from the street for aesthetics purposes and smoother accessibility. This was a much appreciated addition and finishing touch to the project. Thank you Slabjack. You're the best.
    Darelle in Puyallup
  • Excellent service and friendly staff. Quality and efficient work, on time and on budget.
    Dale in Everett
  • Walkway leading up to front door and curtain area in front of garage needed leveling and stab stabilization. Great experience from quote process to concrete leveling work.
    Ronnie in Snohomish
  • The team at Slabjack was very professional and was responsive from initial appointment through job completion. I recommend!
    James in Sammamish
  • Efficient and effective work. Got the job done in 2 or 3 hours. Very polite and knowledgeable workers - Justin, Donny, and Kurt.
    Jim in Buckley
  • Tyler, Donny and Desmond arrived on time, answered all our questions and handled the repair quickly. They were very courteous and cleaned up after finishing the project.
    Florentine & James in Tacoma
  • Great people, very professional! Quality work at a fair price !
    Mark in Stanwood
  • Really impressive work done by the Slabjack team. They raised a back patio as well as a sunken pool deck. It was pretty complicated work, but they knocked it out quickly and with great quality.
    Kevin in Sammamish
  • Couldn't be happier with the quality of the work. They showed up earlier than booked, and did an awesome job. It wss just a small slab lift, 3'x6' but when they left you couldn't tell they were there. Would highly recommend!
    Sean in Oak Harbor
  • The crew was on time, respectful of the area, explained what they were doing and did a good job.
    Ina in Oak Harbor
  • Very professional with great communication. Service as promised and would use again and recommend to everyone.
    Dennis in Monroe
  • I have aggregate slabs for my walkway and they became unlevel due to tree roots. I had the roots removed and slabjack evened out the slabs so they would no longer be a tripping hazzard. The team from the receptionist to the three men that came to my house were quick to respond, on time, polite and professional.
    Elizabeth in Bellevue
  • Wednesday, Chris got us set up to level our sliding glass door step estimate/ appointment online. We had a crew at our house 10 minutes earlier than the 8am to 10am time frame on the following Monday. Excellent repair after a tree root that uplifted the step and removed by landscaper and could not be leveled by hand. Thank you for your great service. Five star!
    J Pugh in Burien
  • Jason and the team had quite a challenge with my garage/ shop floor. There were two corners of an "L" pad that had sunk about four inches and the rest of the slab was down around an inch or two below the original height. The team got it done! All but one stuborn corner are back to the orginal level. I have a few new hairline cracks, but that was totally expected. The team was professional, courteous and friendly. I am very pleased with the results. Last, but certainly not least, Chris' estimate was spot on! Highly recommended.
    Todd in Snohomish
  • Great work, raised sloping walkway to meet flush with driveway. Fast clean work. Minimal visual plugs.
    Greg in Arlington
  • The crew was great. Very meticulous and personable. I would highly recommend Slabjack.
    Robert in Bainbridge
  • I will say that I'm very pleased with the job you crew did yesterday on my sinking walkway slab of concrete. They were on time, professional, well mannered, and efficient at their task. They cleaned up well and were on their way. I would certainly recommend your service to my neighbors.
    Jay in Bellevue
  • They completed their work on time and the driveway looks great. They lifted a bigger area as well to be sure both side of the driveway looked right. Very nice work.
    John in Sammamish
  • Been using your company for 6 years ,great service pleasure working with you on many housing projects guys have always been able to solve subgrade issues keeping customers happily satisfied after their concrete fails and settles.
    Zac in Kenmore
  • I've used Slabjack NW for several condominium projects and the service has been first-rate. On time or even ahead of time arrivals with quick, efficient service.
    Jack in Seattle
  • Very easy to deal with, showed up when they said they would, excellent communication, cleaned up before they left, reasonable price. All in all, a good experience
    Cheryl in Kirkland
  • The Slabjack team did a great job of explaining what we needed and then stabilizing our 'floating' slab in our basement. Quick and professional service - we would definitely recommend them.
    Erik in Redmond
  • Experience with Slabjack was outstanding. Very prompt service, very good work, provided excellent workmanship and work crew was very experienced and friendly.
    Gary in Kent
  • Very pleased with the work.
    Eugene in Duvall
  • Your crew did a great job!
    Jennifer in Mukilteo
  • Everything looks great!
    Francis in Seattle
  • Great job!
    Mark in Sammamish
  • Great job! Thanks.
    Lynette in Bellevue
  • Very helpful and a pleasure to work with.
    Michael in Woodinville
  • Your workers were very courteous. We like the job.
    Merle in Snohomish
  • I sent a good report to Angie's list.
    Karli in Puyallup
  • Appreciated the extra effort put forth by the crew.
    Anne in University Place
  • The crew you sent to take care of my cement walkway and patio were great.
    Leta in Federal Way
  • Did an excellent job and took care to make sure the end result was as proposed.
    Larry in Everett
  • We are very pleased with the results of the concrete repair.
    Bruce & Stephanie in Shelton
  • Your guys did a great job and I am recommending your service to the rest of my neighbors who are all having the same trouble.
    Bruce in Puyallup
  • We found your estimator to be on time, polite, knowledgeable and experienced, eager to solve the problem, and very helpful. Thank you for sending a valuable employee.
    John in Olympia
  • Very pleased with the young men you sent. They were very courteous, polite, professional, and went overboard to make us pleased with the 'slab' work.
    Stan in Puyallup