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Adding the perfect deck can give you extra space for all of your backyard needs for years to come and improve the curb appeal of your home. We are located in Boulder, Colorado, and cater to the needs of those in Boulder, Lyons, Broomfield, Louisville, Superior, Lafayette, Erie, Arvada, Lakewood & Longmont. We also specialize in servicing homes in the surrounding mountainous regions in Boulder County. Let’s setup a time to sit down with Alex Cosman to discuss the best options for both your family and home at no cost. We work with you to design and build the best decking & hand railing options with the optimal materials selected for your space, needs and budget.
Alex Cosman, owner of Cosman Construction, ensures your deck project is executed flawlessly by being present on-site throughout the entire process from consultation to build.
Your Local Boulder Deck Builder
Step 1
Design
Includes rendering, planning, engineering and permitting.
Step 2
Demo & Prep
Demo Old Deck and prepare new footings by digging holes and pouring concrete.
Step 3
Frame & Install
Choose between Kiln-dried pressure treated wood or Fortress Evolution Powder Coated Steel Framing then we’ll install your decking.
Step 4
Final Finishes
Install Railings to complete your deck's structure. Begin Relaxing on your brand new beautifully designed deck.
Why Choose Cosman Construction as your preferred deck builder?
Experience and Details Matter
We’ve been in business since 2013 and have completed thousands of projects. All of our work is professionally done and we pride ourselves on our craftsmanship. At the end of each day, our team will clean up the site, making sure everything is safe and clean for children, pets, and family alike.
We Use Highest Quality, Long Lasting Materials
We install Deckorators Voyage Mineral Based Composite on our decks. We’ve chosen to use this material for its slip resistance, heat resistance, and its 50-year structural warranty. Our Preferred Aluminum Railing comes with a lifetime warranty, guaranteed not to fade, and our Black Fortress Evolution steel framing is warrantied to last for 25 years but will last for many years beyond that.
We Give You the Power to Make Decisions
Cosman Construction gives you options. We offer multiple material choices from framing options to composite decking colors and keep you, the homeowner behind the wheel, giving you the power to design your deck. We’ll make recommendations based on your needs and our experience every step of the way.
Your Satisfaction Guaranteed!
Cosman Construction will always be one phone call away and ready to meet your needs. Alex Cosman takes pride in his work. Check out our reviews to see customer experiences. We won’t finish a job until you are satisfied.
Request A Quote
We look forward to discussing your deck & railing project. Please fill out our form and we will be in touch to schedule your free consultation appointment.