Explore Our Stunning Deck & General Contracting Gallery

Explore the artistry and craftsmanship of our Deck with Rails projects, along with our additions & remodels where we've designed and built 100s of stunning decks and home renovations across Boulder and its surrounding areas. Our portfolio showcases a diverse range of styles and solutions, providing inspiration for your own outdoor space. With every project, Alex Cosman, the owner of Cosman Construction, is personally involved from consultation to build, ensuring that your Deck, Railing, Additions & Home Remodeling is completed efficiently and to the highest standards. To learn more about what options are available for your project, be sure to check out our Decking, Railing, Additions & Remodels & Additional Options pages.