Cosman Construction

4.6(38 reviews on Google)

Fence and Deck Company listing in Boulder, CO

About Cosman Construction

Cosman Construction is a boutique design-build general contractor in Boulder led by Alex Cosman, who stays on each job from the first conversation to the final walkthrough. It builds, repairs and replaces custom decks designed for Colorado snow load, UV exposure and wildfire-area requirements, and installs and repairs fences. Home additions and kitchen, bathroom, interior and exterior remodeling are also part of the work. It serves Boulder, Longmont, Broomfield, Louisville, Westminster, Erie, Thornton and Lyons. Rated 4.6 from 38 Google reviews, 34 of them five stars.

What reviewers mention: beautiful design (8), attention to detail (8), fence install (7), timeliness (4), craftsmanship (4), friendly crew (3), responsive team (3), structural issues (2), quick completion (2), material options (2)

Services and details

  • Builds fences or decks

    Yes

  • Fence installation

    Yes

  • Deck building

    Yes

  • Deck repair and refinishing

    Yes

  • Fence repair

    Yes

No information yet on wood and cedar fences, vinyl fences, chain link fences, ornamental iron and aluminum fences, composite decking, pergolas, gates, commercial work, free estimates, warranty, financing. The website did not say; call and ask.

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Listing compiled from public sources on 2026-11-05. Report a correction or request removal. Back to fence and deck companies in Boulder.