There are many benefits of elevating your coop from the ground. It keeps you flock’s feet dry during wet weather, it lets them move freely around the coop and adds protection from predators. Build your coop at least feet above the ground.
Starecasing: With the StareCasing System three-step installation process, you just measure, cut and install. The patented tread and riser overlays fit over your existing staircase like a glove. No messy demolition. No guesswork.
If we can't refinish the stairs then this might work. DIY: How To Cut, Paint & Install Stair Treads + How To Remove Carpeting + How To Install A Stair Runner (awesome step-by-step tutorial & pictures!) - these are excellent tutorials!