In fact, incentives can be increased up to 75% in case of improvement of one seismic risk class and up to 85% if an increase of two risk classes are achieved: in both cases, the maximum retrofitting expenditure amounts to €136,000 per property unit. Moreover, the Italian government has proved to be a pioneer in Europe, offering the possibility of combining tax incentives for seismic and energy upgrading in case of combined interventions. This research study is still ongoing and next steps will deal with the calibration of the proposed methodology.Īccording to these observations, the Italian 2019 Financial Law, confirmed the so-called “Sisma Bonus” and “Eco Bonus”: the former allows incentives granted in the form of tax credits ranging between 50% and 85% of the total cost, on a total amount of retrofitting expenditure not exceeding €96,000 per property unit (apartment, single family house, etc.) the latter, incentives between 50% and 75% of the total cost not exceeding €40,000 per property unit. Finally, the system proposes a ranking of the best combined retrofit scenarios. For this purpose, the DSS calculates suitable performance indices and relative costs. This study presents a new methodology for the selection of the optimal building renovation scenario through a DSS, which is conceived as a tool to allow a quick, simple and effective identification of the best retrofit strategy, based on a priority scale (e.g., costs and duration of intervention, disruption to the occupants, environmental sustainability, energy savings, thermal comfort, structural safety). A Decision Support System (DSS) may help in evaluating and comparing different combined renovation scenarios, thus promoting the regeneration of the building stock. In fact, the lack of information and/or awareness of the involved parties and the consequent difficulty for condominiums to approve the retrofit works are often insuperable obstacles. However, although a combined renovation is highly recommended, and despite relevant tax incentives which are currently available, the building retrofit market is still struggling to take off. Consequently, most existing buildings show inadequate structural and energy performance. In Italy, as in many other European countries, a large part of the real estate was built before the issue of restrictive regulations regarding seismic resistance and energy efficiency.
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