Timothy Callahan

Timothy Callahan is a former naval architect and general contractor. He is now in his fifth decade of design-build work, with extensive experience in timber framing and natural residential construction. Tim was a part of the team that developed the 2024 International Residential Code Appendix BL "Hemp-Lime Construction" for hemplime's first appearance in US building codes. Since 1995, his work has been focused on the creation of healthy and energy-efficient homes. In an effort to develop a...See more

Timothy Callahan is a former naval architect and general contractor. He is now in his fifth decade of design-build work, with extensive experience in timber framing and natural residential construction. Tim was a part of the team that developed the 2024 International Residential Code Appendix BL "Hemp-Lime Construction" for hemplime's first appearance in US building codes. Since 1995, his work has been focused on the creation of healthy and energy-efficient homes. In an effort to develop a model for a low-carbon and non-toxic living environment, Tim led the design team for the Nauhaus Prototype in 2009; this was the first of 10 permitted hemp-lime projects which he has designed, ranging in size from 1200-9600 square feet. In 2005, Tim co-authored the book with Clarke Snell, "Building Green: A complete Guide to Alternative Building Methods." Tim lives in Asheville, NC. See less