The construction sector, which is a key contributor to worldwide resource consumption and generation of waste, is rapidly embracing circular economy ideas to reduce its environmental footprint and improve sustainability. The building industry shift towards a circular economy is not only critical for decreasing carbon emissions and the loss of natural resources, but it also introduces significant difficulties and hurdles, given the sector diverse and conservative nature. Key problems in this sector involve structural complexity, a lack of consistent norms and procedures, and minimal incentives, all of which impede material recovery and widespread adoption. Furthermore, limited innovations in technology and infrastructure for handling and recycling construction debris, offer logistical and operational challenges. Regardless of these limitations, various opportunities for promoting circular practices in building have emerged. Material science innovations, such as the creation of biodegradable and renewable building materials, present exciting opportunities. Policy measures, such as stronger waste management legislation and grants for circular practices, can encourage globally change. The building sector could move to a healthier and circular future by harnessing technology breakthroughs, encouraging collaborative efforts, and enacting supportive legislation, thereby lowering its ecological impact and increasing efficiency of resources. This chapter illustrates the intricacies and potential of circular practices in the building sector, offering a fair picture of the challenges and opportunities associated with this change.