Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

This study conducted a cost prediction model that minimizes project risk and enables rational decision-making by predicting additional construction costs for insulation work. The essential factors for building energy efficiency have to evaluate in the early stages of the green remodeling project. Criteria for each building’s semi-performance for green remodeling of zero energy level defined, detailed classification items and standards established, and conditions of five groups categorized according to the semi-performance degree. The prediction model consists of three stages: 1) existing building information, 2) insulation material composition, and 3) construction cost derivation. The construction cost consists of 21 insulation items according to the legal standards of existing buildings, calculates material costs, labor costs, and cost. This prediction model constructed a more substantial construction cost calculation model from the perspective of construction and construction costs is possible to present an optimal construction cost scenario according to options such as semi-performance, structure, and region during green remodeling.