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"David and his team did an amazing job. The work was done as he promised and on time. The crew was a great group of guys. Would hire again for all my future needs!! GREAT JOB!"

"Their work was excellent and completed in 2 days. They were professional, polite and kept in constant communication with me. I highly recommend them."

"Mr. Griego went out of his to help out. Squeezed us in during a busy time period to help us out. They are super friendly and did a fantastic job. We will definitely use him again when the time comes!"

"We love our patio, and we love Arturo. He is very patient and he LISTENS! Price seemed fair and reasonable, and Arturo and his crew came when they said they would and did what they said they would do. We will definitely hire CO Concrete again if we want additional concrete work done. We definitely recommend Arturo and his team."

"I’ve got to say that GMM Concrete executed a fantastic protect with my concrete job. They had to relocate concrete planters, remove the deteriorating concrete, level and fill the area, and deal with the surprising summer heat and altitude of working in Woodland Park. The fellows were hard working and dedicated to getting the job done in an efficient and timely manner. The result was a beautiful and functional product that exceeded my expectations. And the cost was amazingly reasonable. I recommend GMM Concrete LLC without reservations or exceptions. I do not think you will find a better or more affordable company than GMM Concrete LLC. And their team of employees is competent, dedicated, efficient and friendly. You can’t go wrong with GMM Concrete!"

"All work was done on time and was of excellent quality! Friendly and courteous!"

"I hired this company to build a new deck in the beginning of July. It is now the middle of September and my deck is still not finished. While the time frame is not completely their fault due to material delivery they wouldn’t show up for days at a time when material was available to work with. There were times they would show up and only stay for a couple hours. The whole process was a nightmare. Their lack of quality shows in all areas of the deck. I drafted the plans myself and they were approved by the building department. I provided them with copies of the plans. They messed up 4 of the 5 concrete piers because they measured them wrong. Instead of redoing them. They poured square pads over them that were only poured on the surface for three of them. One of the outside piers was supposed to be 10 inches. They messed up the measurement then poured a 16 inch pier over it that is approximately 1.5 ft above ground. They also cut a sprinkler line that went through the pier instead of pouring over it like I explained to them. I had to replace one piece of siding that met with the deck. I bought matching siding to replace it. The workers broke the siding while moving it. They bought new siding that was cheaper and did not match the existing siding. They additional broke off another small piece of siding that was not fixed. They left material all throughout my yard for weeks, leading to my grass dying and my sprinklers unable to work because they were covered up. Nails and screws were everywhere until I picked them up. The posts were cut short for the railing, so they nailed pieces of extensions on top of the posts. They messed up fastener spots for the rails leaving holes in the railing. They originally used screws for the framing. They had to be replaced with nails even telling them before they started nails had to be used and it was in the plans from the building department as well. They used facia board for the steps until I explained to them what the facia boards were for. Leading me to be short on facia boards for the rest of the deck. They also started the deck flooring using a facia board, realized the mistake and replaced. But at that point the facia board could not be used elsewhere as it was notched for posts. I bought flashing for the ledger that was never used. When I questioned them about it he stated the siding and ledger were already put on. The quality of work was below average at best. They cut corners and I found it very concerning I had to explain to them parts of building a deck."

"Very professional! The quality of work is top tier! They even figured a way for my son to put his hand prints in his own cement block! So no matter where we move we can take it with us! We will use them agsin! Very soon!"

"Great job. Does what he says when he says he will do it. Good ideas to enhance project. Final stamped concrete patio turned out very well"