Buildings and their operations sit among the biggest climate challenges of our era, but they also offer one of the most impactful levers for emissions reduction.
When we look at the UK, data shows that direct and indirect emissions from the buildings sector in the UK account for 27.7% and 9.1% of total energy-related CO2 emissions, respectively. Significantly, per capita emissions from the buildings sector in the UK are 1.2 times the G20 average, suggesting that there is an opportunity to reduce this impact.
If net zero is the destination, effective management of the built environment is one of the most important routes to get there.
From gadgets to digital ecosystems
For years, “smart building” meant a collection of clever devices, from automated blinds to motion sensors. Today, that model is outdated.
Modern smart buildings function more like digital organisms. Instead of isolated systems operating independently, a central orchestration layer brings them together, aggregating and coordinating multiple sub-systems through a unified digital framework. Lighting, HVAC, occupancy monitoring, and security systems now communicate through shared data frameworks, adjusting in real time to how a space is actually used.
Artificial intelligence sits at the core of this shift as it can analyse usage patterns, forecast demand, and make autonomous adjustments. For example, a meeting room that typically fills at 10 am can be air-conditioned just in time, or lights on an underused floor of the building can be powered down before energy is wasted.
None of this works without high-performance connectivity. Advanced networking technologies such as Wi-Fi 7 and private 5G are being deployed to ensure low latency, high capacity, and airtight security. These networks form the invisible nervous system of the building, carrying the data streams that enable continuous optimisation.
Across the Channel
In many EU countries, smart buildings are increasingly treated as essential infrastructure, rather than an optional innovation.
Countries such as France and Germany have embedded automation and monitoring requirements into climate legislation, and digital capability is becoming a matter of compliance, not just a competitive differentiator.
At the centre of this transformation is the Energy Performance of Buildings Directive. This legislation requires all new buildings to be zero-emission by 2030 and existing stock to follow by 2050. Achieving that at scale without digital systems that continuously measure and optimise performance would be nearly impossible, meaning that as member states translate the directive into national law from 2026 onwards, investment is expected to intensify.
France provides a concrete example through its Decree BACS, mandating building automation and control systems in larger non-residential properties. By 2027, any such building with output above 70kW must comply with the legislation.
Progress in the UK
The UK presents a more fragmented picture. Innovation is not the problem. Manchester’s Triangulum initiative is a standout example of smart, low-carbon urban development. By integrating energy-efficient technologies, IoT sensors, and renewable energy systems, it demonstrates how coordinated digital infrastructure can reduce emissions and create more sustainable, liveable city spaces.
The difference lies in consistency. The UK lacks a comprehensive, national framework that mandates or systematically incentivises smart building adoption at scale. Instead, progress tends to occur on a project-by-project basis.
One lesson from continental Europe is that well-designed regulation does not stifle innovation, it often accelerates it.
A strategic framework in the UK could:
• Define common standards for smart buildings and energy efficiency
• Support interoperability across regions and technologies
• Encourage investment in digital infrastructure upgrades
The next opportunity lies in coordination. A national standard for smart buildings and smart cities could provide clarity for investors and developers, while also allowing for local flexibility.
The UK’s move towards net-zero
The good news is that although the UK still lacks an overarching framework on smart buildings and cities, many existing regulations are being adapted and modernised to help reach the goal of net-zero by 2030.
For example, the Minimum Energy Efficiency Standards (MEES) currently require commercial and private rented domestic properties to have an Energy Performance Certificate (EPC) rating of at least E. The government is currently consulting on proposals to raise this standard, which would potentially require all rented commercial buildings to achieve EPC B by 2030 to remain legally lettable.
In practice, this means significant upgrades for the UK’s commercial building stock. Investment in building fabric materials, LED lighting and controls, HVAC replacement, building management systems, and smart energy monitoring will be instrumental in achieving this standard and reducing environmental impact.
Other regulatory changes, such as reform of the Energy Performance of Buildings (EPB) Regime, will also play a key role when it comes to improved data collection, new EPC metrics that better reflect operational performance, and quality assurance for EPC assessments.
Taken together, this legislation is likely to require the installation of smart technologies across UK buildings.
Smart buildings: An important opportunity
Smart buildings are a powerful tool for cutting carbon emissions. By using real-time monitoring, automation, and AI, they reduce energy waste and optimise heating, cooling, and lighting. Beyond efficiency, they provide the data and control needed to achieve large-scale emissions reductions.
Effective regulation is key to driving adoption and creating a low-carbon, sustainable built environment. If the UK is to accelerate toward net zero, smart buildings must move from isolated examples of best practice to the standard for how we design, operate, and upgrade our spaces.
Chris Derham, Business Development Director, Networks Division, Alcatel-Lucent Enterprise
- Data & AI
- Sustainability Technology