Guest Editor(s)
Prof. Soumia Mounir
Email: s.mounir@enaagadir.ac.ma
Affiliation: MECAD, National School of Architecture Agadir Engineering department, university,
Complexe Universitaire Ibn Zohr. Quartier Dakhla, Agadir, Morocco
Homepage:
Research Interests: energy efficiency, materials, sustainability in buildings, management of energy.

Prof. Manuela Almeida
Email: malmeida@civil.uminho.pt
Affiliation: Department of Civil Engineering, School of Engineering, University of Minho, Guimarães, Portugal
Homepage:
Research Interests: sustainable built environment, energy efficiency in buildings and communities, building renovation, life-cycle assessment

Summary
The building sector is undergoing a profound transformation driven by the urgent need to reduce energy consumption, greenhouse gas emissions, and resource depletion while maintaining high levels of comfort, health, and indoor environmental quality. Energy efficiency and the use of sustainable materials are two complementary pillars of this transition. Innovative building envelopes, efficient HVAC and heat pump systems, smart controls, renewable energy integration, digital simulation tools and low-carbon materials can significantly improve building performance throughout the life cycle. At the same time, circular-economy principles, bio-based and recycled materials, and life-cycle assessment approaches are increasingly important for reducing embodied carbon and supporting more resilient, sustainable construction practices.
This Special Issue welcomes original research articles and review papers on energy-efficient buildings and sustainable materials, with an emphasis on integrated strategies that combine operational energy reduction, low-carbon construction, durability, comfort, and environmental performance. Contributions may cover, but are not limited to:
· net-zero and nearly zero-energy buildings
· building renovation
· passive and active energy strategies
· HVAC optimisation, heat pumps
· smart energy management
· building energy simulation
· sustainable and smart materials
· circular economy
· life-cycle assessment
· embodied carbon
· innovative construction systems
Keywords
energy efficiency, sustainable materials, sustainable buildings, net-zero buildings, nearly zero-energy buildings, building renovation, HVAC optimisation, heat pumps, building energy simulation, smart energy management, Life-Cycle sssessment, circular economy, low-carbon construction materials, bio-based materials, recycled materials, embodied carbon, indoor environmental quality.