Energy Efficiency Is Not the End Goal: Socio-Economic Sustainability Lessons from Four Rural Housing Cases in Scotland

The pursuit of energy efficiency has dominated sustainable housing policy and research, yet growing evidence suggests that technical performance alone cannot guarantee positive outcomes, particularly in rural contexts where housing is embedded within complex socio-economic systems. This study addresses this gap by developing and applying a context-specific analytical framework for evaluating the socio-economic sustainability of rural housing in Scotland. Through a structured literature review of 43 peer-reviewed articles and thematic coding, four core sustainability dimensions were identified: People and Community, Land and Site, House, and Energy and Infrastructure. The framework was developed and tested through four contemporary rural housing case studies in Scotland, spanning private and social tenures across Aberdeenshire, Moray, Dumfries & Galloway, and Shetland Islands. Data were collected through semi-structured interviews, on-site observations, and documentary evidence. A multi-evidence traffic-light evaluation system was developed to cross-check assessment results across distinct data sources. The findings reveal that sustainability outcomes are conditional, sometimes uneven, and shaped by multiple factors. While all cases demonstrated strong performance in community cohesion, affordability, and non-speculative land access, some persistent challenges emerged around energy resilience, fuel poverty mitigation, transport accessibility, and participatory practices for social-house design. The study contributes a replicable analytical framework to develop and evaluate rural housing sustainability beyond energy-efficiency assessments, providing empirical insights for policy and practice in Scotland.