Shamrock Carpentry of Bozeman, MT, are the Room Addition Specialists! For over 40 years, the carpenters at Shamrock have been building beautiful room additions and other outdoor (and indoor) structures like; patios, redwood decks, pergolas, and just about anything you can imagine. Our goal is to meet the needs of our customers and exceed them by providing quality workmanship, competitive pricing, and timely completion dates. We have great relationships with our clients and a 5-star rating. For a beautiful room addition that your family will enjoy for years to come.