Adapting sustainable energy features to existing condominium building stock in Sri Lanka

To achieve a sustainable future, Sri Lankan condominium buildings must be retrofitted with sustainable energy features. As the existing households account for 37% of energy consumption in the building sector considering the existing condominium stock is crucial. However, there is a lack of research on implementing energy conservation methods in Sri Lanka's existing condominiums, including social, financial, and technical challenges. Thus, this study aims to fill this gap by providing practical solutions to address the efficient energy consumption in existing condominium. Using a qualitative research approach, semistructured interviews were conducted with industry experts. Findings revealed a wide range of adaptable energy features for retrofitting, such as green roofs, LED lighting, tinted glasses, solar systems, and IT applications. Barriers for implementing sustainable energy features were identified and categorized as social, technical, financial, legal, market, and government-related barriers. Strategies to overcome these barriers include raising awareness, modifying policies, offering incentives, involving professionals, and exploring funding options. This research guides the adaptation of sustainable energy features in Sri Lanka's existing condominiums thereby enhancing the efficient energy usage within the condominium sector.