The research explores how lifecycle modularity and delayed differentiation can change the way we build and design spaces. Lifecycle modularity means incorporating modular elements at every stage of a building’s life, making it more adaptable and sustainable. Through a review of existing studies, the research identifies the main challenges and opportunities of modularity, especially during the use phase. Emerging trends and technologies, like adaptable architecture and smart building systems, provide promising solutions to these challenges. Additionally, the study examines delayed differentiation, which involves postponing product customization until later in the supply chain. It explores how this concept can be applied to the built environment with innovative designs such as plug-in and plug-out modular architecture. These designs allow for greater customization, enabling users to tailor their spaces to their specific needs. The research includes examples of space product innovations, showcasing the potential of lifecycle modularity and delayed differentiation. These innovations offer flexible and adaptable alternatives to traditional construction methods, from prefabricated housing to mobile modular units. Furthermore, the study highlights the role of startups and innovative companies in driving these changes, using advancements in technology and design to create more responsive and sustainable built environments.