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1 Year In Business

Company Details

  • Verified Licenses


552 South P Street
Livermore, CA 94550


  • Mon: 7:00 AM - 6:00 PM
  • Tue: 7:00 AM - 6:00 PM
  • Wed: 7:00 AM - 6:00 PM
  • Thu: 7:00 AM - 6:00 PM
  • Fri: 7:00 AM - 6:00 PM
  • Sat: 8:00 AM - 1:00 PM
  • Sun: Closed
View All Details & Credentials


Service Details

  • Residential Work
  • Commercial Work
  • Small Jobs Welcome

Areas of Expertise

  • Drainage
  • Excavation
  • Retaining Walls
  • Trenching
  • Grading
View All Offerings and Cities Served

Cost Information

  • Free Estimates
  • Warranty Offered


12 Verified Reviews
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
Showing 1-10 of 12 results
5.0 Deborah S. Moraga, CA

Matt and Dan tackled my hillside retaining wall project with enthusiasm, solid project management experience, and excellent communication skills. They made sure I knew their schedule for the day, what part of the project they were working on, and what they were going to accomplish. They were very respectful, cleaned up the work area every day, and when finished, left me with a beautiful stone, retaining wall. The quality of their work was outstanding and they paid attention to details. I would definitely hire them for another outdoor project. I highly recommend them without hesitation. They were a pleasure to work with!

5.0 Bart B. Berkeley, CA

Matt Mahoney with Solves All Engineering put my mind at ease immediately. A general engineer by profession, Matt started talking solutions from the get-go, not trying to “sell” me his service. (He also worked within my budget and didn't eye me like a dollar sign, either.) Matt proposed a multipronged solution, digging a trench alongside and below the foundation wall, sealing gaps and waterproofing the outside of the foundation, placing a sump pump inside the trench to drain underground water away from the house, and then filling the trench with porous rocks compatible with existing landscaping. Matt and his crew showed up on time, completed the job on schedule, took care to clean up the work area, and stayed on budget. As proof of concept, Matt took a garden hose and flooded the rock-covered trench to simulate a heavy rain. As the trench started to fill with water, the electric sump pump turned on automatically, piping the water onto our driveway where it ran to the street. Perfect!

5.0 Jamie G. Danville, CA

Matt and his team overall did a fantastic job. Attention to detail with providing the initial survey to ensure the drainage ditch had sufficient slope for water flow. Matt is easy to work with and we appreciated his follow-up to ensure the water flow during the recent storms.

5.0 Gary G. Alamo, CA

Matt & Dan are very friendly, hardworking & professional. They bid the job I wanted done, were very fair in their bid, explained exactly how they would accomplish it and allowed me to ask questions as work proceeded. Very happy with the results. If you need a retaining wall replaced or built, hire these guys!

5.0 Nenita D. Antioch, CA

Matt and Dan are absolutely a joy to have . They are very friendly, hardworking and professional. They ask you what and how you want it done. They are so easy to talk to. They did a great job on my retaining wall that gave me a lot more space to use in my backyard. I will definitely recommend this dynamic duo to any of my friends and relatives . I really appreciate them for a job well done

5.0 Celine A. Pleasanton, CA

Matt and his crew have an unusual combination of qualities for a contractor. Not only are they extremely knowledgeable, professional, and do quality work, they are RESPONSIVE, HONEST and TRUSTWORTHY. The jobsite was always kept impeccably clean. Matt genuinely cares about the quality of work he leaves behind. A lot of contractors take their final check and go - but Matt is as responsive now (even though the job is complete) as he was before the job started. I trust Matt and his team in my home and with my family. I will be hiring him again and would not hesitate to refer him to family and friends.

5.0 Jeremy G. Concord, CA

Matt ripped out my old patio and built a deck for me last summer. They were quick and did a great job

5.0 John M. San Francisco, CA

Matt put in a retaining wall for me in 2021 on a slope that was creeping towards my house. He did an exeptional job. He was prompt, responsive and fair. I would hire him again and have recommended him to others in the neighborhood.

5.0 Keagan M. Grass Valley, CA

Great experience with Matt and crew. Talented operator and did a great job cleaning up when job was finished.

5.0 Katherinne H. Livermore, CA

Matt put in a French drain for us where our yard would get swampy after heavy rain. We havenâ t had any issues since so what else can you ask for?


Solves All Engineering
Retaining wall
Stone wall and veneer

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