Mammoth Construction

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• By A. R.

  June 5, 2025

  New roof

  $98,000

  Absolutely terrible and rude. Avoid unless you're an engineer capable of construction project management, and ready to babysit David and his crew every day. Those folks should have their license revoked. They know nothing about joist span tables. They don't know which fasteners to use and will try to use lowest gauge and shortest nails. They don't know that there are different types of screws for fastening different materials. They don't know how to frame properly - some wall framing will be attached to roof's OSB rather than to rafters. Shingles will be nailed anywhere up to 5 inches above and below the nailing line. Hired them to build a new roof, ended up with water damage of the main level ceilings, and some holes in the ceiling as someone stepped on it from above. Instead of apologies I received an offer to roughly fix it with plaster and patch paint, without full repaint of the ceiling. They had to redo shingles and hired subs for pretty much anything besides framing. Mammoth doesn't hire pros but relies on friends and family to do the project. So don't be surprised if wife of David's brother will be working on your project. David will disappear once the project is half-done and will switch to another job. He will also stop responding phone calls and will tell you that your calls don't get through. I guess they can probably build you a flower bed or a fence, maybe pour concrete. Never hire them for anything more complex than that.

• By Andi J.

  January 20, 2023

  Kitchen remodel

  $43,000

  Horrible would not refer them to anyone. Had amateurs doing painting, drywall hanging doors flooring, and not being supervised or showing how to do it. They would look off of YouTube to see how to install. Put in cabinets without having any electrical , gas lines or waterlines ran . Cabinets were supposed to be custom and we’re not. In fact, the door fell off in my hand when opening. Time period of completion was suppose to be 3 weeks and was not even halfway 4 months later and with very poor craftsmanship. Also, had no water, No electricity in the entire kitchen the entire 4 months. Had to fire them. David is very rude to communicate with. The crew had to completely start over and were done in 7 weeks.

• By Justin E.

  December 3, 2021

  Bath remodel

  $14,000

  Walked off job uncompleted! Terrible communication throughout whole process. 6 week tools 6 months still not done. Had to complete job myself. Will be sending to court.