This construction technology report analyzes various aspects of building construction and maintenance. It begins by examining traditional low-rise domestic buildings, covering foundations, structural systems (masonry walls), enclosure systems, and interior finishes. The report then delves into the reasons for building deterioration, including concrete corrosion, salt crystallization, frost damage, and microbiological growth. It differentiates between planned and reactive maintenance, outlining the advantages and disadvantages of each approach. The report further explores commercial and industrial construction systems, focusing on foundation types and necessary building materials like concrete and metals. The report provides insights into building materials, construction methods, and maintenance strategies, offering a comprehensive overview of construction technology principles.