From Energy-Efficient Buildings to Energy-Conscious Occupants: Societal Implications of High-Rise Building Research in Lagos

In the bustling heart of Lagos, a city growing taller by the day, a quiet tension exists between the need for modern office space and the heavy cost of keeping those spaces cool. As the city expands vertically, filling its skyline with glass and steel towers, the energy required to run them is becoming a critical concern. This is not just about paying electricity bills; it is about how a city functions, how businesses operate, and how much strain is placed on the environment. The core of the problem lies in two distinct areas: the physical shell of the building and the people inside it. The shell, known as the building envelope, includes the walls, windows, and roof that separate the interior from the hot tropical air outside. If these elements are not designed correctly, they let in too much heat, forcing air conditioning systems to work harder. However, even a perfectly designed building can waste energy if the people inside do not use it wisely. The question facing urban planners and architects today is whether energy efficiency is solely a matter of engineering, or if it also depends on the daily habits of the occupants.

A recent study focused on four major office towers in Lagos—Heritage Place, Kings Tower, Nestoil Building, and Churchgate Tower—set out to untangle this relationship. The researcher, Edward Adeshola Oladigbolu, did not rely on guesswork. Instead, they combined two powerful tools: computer simulations that modeled how the buildings would perform physically, and a survey of 217 people working inside those towers to understand how they actually behaved. The goal was to see if knowing more about energy efficiency changed how people acted, and whether those actions actually made a difference to the building's performance. The study looked at specific design features like the size of the windows, the type of glass used, the shading on the façade, and the direction the building faced, comparing these against the daily choices of the workers, such as whether they turned off lights or equipment when not in use.

The results of the computer simulations painted a clear picture of the current reality. The four buildings consumed between 208 and 213 kilowatt-hours of energy per square meter every year. To put this in perspective, this amount is significantly higher than the targets set by international standards for efficient buildings, which aim for much lower numbers. The simulation revealed that the physical design choices made when the buildings were first planned were the primary drivers of this high energy use. Specifically, the way the glass was installed, the presence or absence of shading to block the sun, the thermal properties of the walls, and the orientation of the building relative to the sun were the most critical factors. The study suggests that these decisions, made during the design phase, lock a building into a certain level of energy demand for decades. If the façade is not treated as a functional system for controlling heat, but merely as an aesthetic feature, the building will struggle to stay cool without excessive energy consumption.

Yet, the most significant discovery of the research was not about the bricks and mortar, but about the people inside. The study found a direct and powerful link between what occupants know and how they behave. When workers understood the principles of energy efficiency, they were much more likely to adopt habits that saved energy, such as switching off equipment when it was not needed or adjusting their workstations to take advantage of natural airflow. This knowledge did not just stay in their heads; it translated into action. Furthermore, the research showed that these behaviors had a measurable impact on how the building performed. When occupants managed their use of lighting and equipment effectively, it reduced the overall load on the building's systems. This means that energy efficiency is not a static feature of a building that can be switched on or off; it is a dynamic result of the interaction between the design and the people using it.

The implications of these findings extend far beyond the four towers in Lagos. The study argues that creating energy-efficient cities requires a shift in how we think about construction and management. It is not enough to simply install efficient air conditioning units or solar panels. The design of the building must be optimized from the start to minimize heat gain, and the people inside must be educated and empowered to use the building correctly. Facility managers and building owners need to view energy performance as a continuous process that involves training staff and providing feedback, rather than a one-time technical fix. For policymakers in rapidly growing African cities, this research offers a roadmap: building regulations should encourage performance simulations before construction begins, and professional training should include the human element of energy use. The path forward is clear. A truly efficient building is one where the design sets the stage for success, but the occupants provide the performance. Without both, the potential for a sustainable, low-energy city remains out of reach.