Beyond Smart
Smart buildings are often presented as the answer to many of the built environment’s most pressing challenges. They promise lower energy use, better comfort, improved visibility, more responsive services and a clearer route towards Net Zero. Yet smart building performance does not always match the ambition set out at design stage.
This should concern everyone involved in creating, managing or occupying commercial buildings. When a building underperforms, the consequences are practical and measurable. Energy is wasted, occupants experience poor comfort, facilities teams inherit avoidable complexity, and owners and operators struggle to demonstrate the outcomes they expected from their investment.
The issue is rarely a lack of technology. Many buildings already contain sophisticated systems, sensors, meters and connected devices. The problem is that capability only becomes useful when systems are properly integrated, commissioned and optimised. As highlighted in the BCIA’s white paper, ‘Comfort, Efficiency and Health: The Untapped Potential of Building Energy Management Systems’, advanced building controls can reduce energy use by 22% to 30% while maintaining comfortable conditions.
This is why building controls must be treated as a central part of the performance strategy, not as a technical package added at a late stage.
Smart building performance depends on integration
A smart building is only as effective as the systems that connect, interpret and control it. HVAC, lighting, metering, sensors and other building services may each be technically capable, but they will not deliver consistent results if they are designed and operated in isolation.
Building controls and building energy management systems (BEMS) provide the operational layer that enables systems to communicate, respond and adapt. They turn separate technologies into a coordinated building environment.
Late-stage integration of controls remains one of the most common reasons why smart buildings fail to perform as expected. By the time controls specialists are involved, key decisions may already have been made about plant selection, zoning, metering, interfaces and occupancy assumptions. The controls strategy is then forced to work around decisions rather than help shape them.
The result is a building that is technically smart but operationally compromised. Systems may be connected but not aligned. Data may be available, but not useful. Automation may exist but not reflect the way the building is actually used.
The building performance gap is often a controls gap
The building performance gap is usually described as the difference between design intent and real-world operation. In practice, that gap is often exposed through controls.
A building may be designed with efficient plant, but if control strategies are poorly configured, systems run unnecessarily. Heating and cooling can overlap, ventilation may not reflect occupancy, and lighting can remain on in underused areas.
The scale of the opportunity is significant. BCIA modelling shows that upgrading to advanced BEMS across offices, schools and hospitals could deliver around 7.4% annual emissions reduction across UK commercial and public sector buildings. These issues directly affect energy efficiency, comfort, maintenance costs and confidence in smart building investment.
Controls must therefore be part of early project conversations. Project teams need to understand how the building will respond to occupancy, how systems will be monitored, who will use the data and how performance will be reviewed after handover. These are fundamental performance questions, not technical details.
Commissioning proves whether the strategy works
Commissioning is where assumptions are tested and design intent meets operational reality. For smart building controls, this goes beyond confirming that systems are connected. It requires validation of control sequences, interfaces, sensors and system responses, alongside clear communication with facilities teams so they understand how the system should be used.
Insufficient commissioning can leave buildings with hidden problems from day one. A space may appear comfortable during handover but perform poorly in different conditions. Sensors may be incorrectly calibrated, or control strategies may fail under real operating demands.
Commissioning should be seen as a performance process, not an administrative milestone. It is one of the most important safeguards against long-term underperformance.
Data only creates value when it drives optimisation
Smart buildings generate data, but data alone does not improve performance.
The value of BEMS lies in how that data is interpreted and acted upon. Occupancy patterns change, space use evolves and equipment performance shifts over time. Without ongoing optimisation, even a well designed building will drift away from its intended performance.
Building automation enables a more proactive approach. Rather than responding to faults or complaints, facilities teams can use BEMS insight to identify trends, refine settings and improve performance over time.
Regular reviews of building systems can highlight plant running outside occupied hours, persistent comfort issues or energy use that does not reflect demand. This allows teams to move from reactive maintenance to informed operational management.
Controls expertise needs a seat at the table
If the UK is serious about improving smart building performance, controls expertise must be involved earlier and more strategically.
This is not only a technical issue, but one of coordination and accountability. Smart buildings rely on specialist knowledge across design, installation, commissioning and operation. When that expertise is introduced too late, performance can be compromised.
The wider economic case is also clear. Improved internal environments enabled by advanced BEMS could generate £5.29 billion in annual GVA, rising to £12.75 billion by 2050, alongside reducing millions of sick days each year.
For clients, consultants and contractors, the takeaway is straightforward: engage BEMS specialists early, define the controls strategy around outcomes, commission thoroughly, train users properly and treat optimisation as an ongoing discipline.
Better smart building performance starts with controls
Smart buildings underperform when the systems intended to make them intelligent are not properly integrated, commissioned, understood or optimised. Building controls are the link between smart capability and real-world outcomes. They determine how buildings respond, how energy is managed, how comfort is maintained and how useful operational data becomes.
If smart buildings are to deliver on their promise, controls must be recognised as a core part of building performance from the outset. For the BCIA, this is central to the sector’s role.
Better outcomes depend not only on better technology, but on the expertise needed to make that technology work in practice.
