Cosman Construction

We have a new deck thanks to Cosman Construction! Alex did an excellent job from start to finish; It looks great from the black railing on top to the beautiful hardware anchoring the posts to the foundation at the bottom. In fact, the entire support structure underneath exudes strength and the details of fine craftsmanship are pleasing. We appreciate Alex's attention to detail, his patience as we decided what we wanted, and the quality of the materials used. He gave us lots of options in both design and materials. The team/crew on the job were steady workers and great to have around while the work was being done.

Extremely satisfied with our experience with Cosman Construction! Alex is fantastic to work with...very personable, professional, responsive, and transparent. The quality of the work is amazing...high standards for engineering and structural integrity plus an eye for beauty and aesthetics. We love our beautiful new deck!

Alex built us a new back deck with cable railing to better enjoy the view. The work was very high quality and completed quickly. Alex was responsive to all the minor requests and questions we had. You get what you pay for - highly recommend.

Alex and his crew were very attentive to my needs and came up with a great solution to my deck issues. It looks better than ever and I did not break the bank. Highly recommend Cosman Construction.

I used Cosman Construction for a deck install, fence install, and some other landscape work. They are not cheap but you absolutely get what you pay for. The final project is beautiful and we are completely satisfied. Alex and crew were very professional and knowledgeable. They paid meticulous attention to quality and detail and have the tools and expertise to make sure everything is done correctly - they removed an old concrete deck slab, sunk concrete for a deck, built a composite -topped deck, graded much of the yard with new dirt, and built a new privacy fence. Throughout they were great with communication - always on time and in contact. They explained all aspects of the project and went above and beyond to make sure we got exactly what we wanted.

I had an exceptional experience with Alex and the Cosman Construction team. Their pricing was reasonable, and they provided practical recommendations on what needed to be done. They collaborated with me to determine the best solutions within my budget for my deck remodel/repair. Their efficiency was impressive, and the results were excellent. Alex is very knowledgable about deck and fence construction and has a great eye for aesthetic beauty as well. I highly recommend Cosman Construction and will unquestionably enlist their services for my future projects.

Alex and crew built a small deck in front of my kitchen and office entrances. They also built planter boxes, a fence and gate, and laid a concrete pad and sidewalk for the hot tub.

The quality of their work was very high. I expect that from a Boulder contractor. The thing that was most impressive and rather surprising to me was the flexibility and positive attitude Alex displayed throughout the course of the job.

When I would change the plan, or ask him for suggestions about how to make it "more the way I imagined it" the morning they were about to start on a new aspect, Alex went with the flow, made suggestions and stayed positive in a way I've rarely if ever seen in my experiences of spending hundreds of thousands of dollars on home improvement.

Could not recommend Cosman Construction highly enough.

We hired Alex to replace a main support post that had shifted and sunk on our second-floor deck. Alex poured a new footer and replaced the support beam to re-level the deck. He showed up on time and had great communication. We would definitely use him again!

In the long process of remodeling my older home, Cosman Construction has by far been my best experience with a construction team. They were reasonable on cost and realistic on what could and should be done. They worked with me to help decide what would work best within my budget on my deck remodel/repair. They were also super quick/efficient and did an excellent job. Highly recommend them and will definitely use them again on my next project.

While searching for a contractor to repair my 17 year old composite deck I stumbled across The A-Team in Alex and Jay. Half of my deck is 8 to 10 feet above grade, contributing to structural issues underneath. The deck floor boards had remaining life, but the railing was discolored and crumbling. I decided on underneath repairs and new railing. Alex uses top of the line material and I am beyond pleased with the outcome. The goal is to get 10 more years from my deck. The new railing makes the whole deck look new.

Because of deck age and height, problems arose every step of the way. Alex was able to analyze and make solid recommendations on how to proceed. We had joists pulling out of hangers, warped joists, staircase railing needing reconfiguration, cracked and twisted deck support posts, posts that did not line up for a straight railing, and other surprises. All repairs and replacements were executed with ease and finesse.

Cosman Construction hit the mark on technical competence, teamwork and communication. Alex and Jay make a team that can deliver quality results. I would definitely use Cosman Construction for future work.

Alex's work is absolutely top-notch. His quote came in very competitively and he was able to turn the entire project around in less three days. I liked that he consulted with me on small design changes during the project, asking my opinion on what I thought would look better. I had some fence repair done by another company earlier in the year and I regret not having hired Alex for the job, as his craftsmanship is far better.

Alex is very professional and knowledgeable. He reinforced my deck that was sagging due to the weight of my hot tub. He kept me informed throughout the project.
Alex is meticulous and easy to work with. His associate, Jake compliments Alex and they work well as a team. I highly recomend Cosman Construction.

The first project Alex and team worked on for us was a wrap-around landing and staircase from our house down to our new paver patio. Alex's attention to detail was very helpful in both selecting the attractive and functional materials as well as adapting the stairs to the slight imperfections of our paver patio.

We appreciated the quality and craftsmanship of this first project so much that we immediately hired him for a second project to build a contemporary horizontal cedar fence around our yard. Alex's attention to detail and sense of design aesthetics led to several helpful and attractive ideas to adapt the fence to our yard. We couldn't be happier with the outcome!

Alex and team were a real pleasure to work with and we look forward to our next project with them.

Alex built a staircase addition to our existing multi-level deck. He did an excellent job matching the new materials and design to the existing deck, even though the original is dated. The final product is terrific. Alex is an enjoyable person to work with, was communicative and responsive, and seems like an all-around good guy. I would not hesitate to hire him again!

Alex and his crew were fantastic to work with. They were professional, timely, and their attention to detail was amazing! They kept the site pristine throughout the project and were very respectful. We are so happy with our new front deck and would highly recommend Cosman Construction.

We had Alex rebuild the curved step on our deck. He was professional, friendly and prompt, from the initial visit and estimate, continuing through the entire construction process. It's clear he cares about doing quality work and we were very pleased with the result. He left things tidy at the end of each day, and at the end of the project he cleaned up entirely. Having worked with our share of contractors, I can tell you Alex is one of the good ones, and can wholeheartedly recommend him.

I’d like to start by saying my new deck is beautiful. Alex & team did a great job replacing a really poorly built deck at a fair price.

Negative: communication was really poor after being hired and the job took about 2 weeks longer than originally quoted with no discounts or apologies.

He started about a week after he said he would. When he did start, I left my house for 4 days (the amount of time he said it would take to finish the build). I left because my job is 80% meetings and my dogs bark a lot with noise outside. I work from home. When I returned, the only things completed were the demo and the posts (which he texted me and said was done on the first day). I left my home again for another 5 days. When I returned, it still wasn’t done.

I realize that things happen, especially with crew and equipment, but that could have been better communicated especially knowing I could have just stayed at my house during that time (he was aware). Alex seemed really stressed out the whole time and unwilling to do the work without any help. It’s not a big deck. People build decks by themselves all the time, even when they don’t do it as a profession. When he did get help, it was fairly smooth (the guy helping him was a champ).

Honestly the whole process kind of left a bad taste in my mouth. I could have just spent the extra $500 and had it done in 3 days like other companies were quoting me.

Again, final product is great. If you can get him at a time where he has a crew, I would recommend. I’d just stay on top of progress updates if you aren’t physically there to supervise.

Alex and his team went above and beyond to make our experience exceptional. Once he showed us that our existing framework was failing, he immediately came up with options to rebuild the entire staircase using composite materials. His attention to detail and willingness to ask for our opinion was truly valued throughout the process. We would absolutely recommend him for projects looking for great workmanship at a fair price.

Alex did some major repair work to our deck and also installed custom built gates on our deck stairs. He does excellent, thorough work, is very knowledgeable, and was very easy to work with. I had contacted several contractors for these repairs and Alex was the only one who responded immediately and got right to work. I highly recommend him!

Three levels of decks and stairs were a challenge and now are all sturdy, safe and beautiful. My mountain neighbors and friends critique only with comments of how well everything was done. (One of these neighbors built his own house.) The old route to my front door had been complicated. Alex of Cosman Construction designed a more direct and beautiful way of entrance. The challenge, other than winter winds, was my house isn't exactly plumb. Their measurements are exact! The result is satisfactory perfection. My fortune in fate was that I found them and I most certainly recommend Cosman Construction.

I had Alex and his very competent team build two decks totaling 700 square feet, along with a 70ft. reinforced property line fence and was super impressed with the results. Timely execution, no missteps and the end result on all phases, beautiful.
I plan to work with Alex again soon on other property projects.

Alex came as a referral from a friend for whom he built a complicated set of decks. He performed as our friend said he would. He was here when he said he would and worked through snow and cold to complete our deck on time. Alex and his workers were very respectful and pleasant to deal with. He built a solid and attractive deck that should outlive us. We would highly recommend Alex to anyone who needs to have a deck built.