Sustainability in commercial electrical projects

Sustainability is no longer a “nice to have” in commercial construction; instead, it has become an essential requirement. With tightening regulations, rising energy costs and the national drive towards net zero, commercial developments are under increasing pressure to deliver measurable environmental performance.

Electrical design and strategy is an important factor in helping businesses reduce their carbon footprints, improve energy efficiency and meet regulatory standards. From the early-stage planning stage right through to ongoing operation, sustainability in commercial electrical projects not only ensures compliance with regulations. It also helps businesses achieve better environmental performance, long-term cost savings and future-ready buildings.

Here we’ll take a look at how business can reduce their environmental impact while delivering long-term value through frameworks like BREEAM, efficient electrical design and smart controls.

Sustainability in commercial electrical projects

1. BREEAM and the drive for sustainable design

In the UK, BREEAM (Building Research Establishment Environmental Assessment Method) remains one of the most widely adopted sustainability assessment methods for commercial buildings.

This internationally-recognised certification assesses buildings across a range of categories, including energy use, materials and overall environmental impact. Many developers and clients now expect projects to achieve ratings such as Very Good, Excellent, or even Outstanding.

Electrical systems are crucial to BREEAM scores, particularly within the Energy and Management categories. Achieving a strong BREEAM rating requires early collaboration between electrical engineers, sustainability consultants and the wider design team. This helps deliver a coordinated, performance-led design that is expected to demonstrate:

• Low-energy lighting solutions, typically LED based
• Effective energy monitoring through sub-metering
• Integration of low- or zero-carbon technologies, such as solar PV
• Controls that reduce unnecessary energy use

BREEAM encourages a holistic approach, where electrical design isn’t treated in isolation but as part of a broader sustainability strategy that aligns building performance with environmental responsibility.

2. Efficient electrical design

Efficient electrical design is fundamental to reducing operational energy use in commercial buildings across the UK. It isn’t just about compliance; it’s about creating resilient, future-proof systems that adapt to changing energy demands and technologies.

Given the long life cycle of most installations, early design decisions have lasting consequences, making it essential to get it right from the start.

Key areas of focus include:

• Load optimisation: Avoiding oversized systems helps reduce unnecessary energy consumption and capital costs
• High-efficiency equipment: Selecting transformers, motors and distribution systems with low losses improves overall system efficiency
• Lighting design: Combining LED fixtures with intelligent layouts and maximising natural daylight can significantly cut energy use
• Power quality and efficiency: Measures such as power factor correction help reduce waste and improve system stability

Additionally, integrating renewable energy sources—such as solar PV—into the electrical infrastructure can further reduce reliance on grid electricity and lower carbon emissions.

There is also a growing emphasis on designing systems that support electrification, particularly as the UK transitions away from fossil fuels. This includes enabling future integration of technologies such as EV charging and heat pumps.

3. Smart Controls

While efficient design sets the foundation, smart controls bring buildings to life. They ensure that electrical systems operate efficiently in real time, adapting to occupancy patterns and environmental conditions so that energy is used only when and where it’s needed.

Examples of smart control strategies include:

• Occupancy sensors and absence detection: These ensure that lighting and HVAC systems are only active when spaces are in use
• Daylight harvesting: Automatically adjusting lighting levels based on available natural light
• Building Management Systems (BMS): Centralised platforms that monitor and control electrical systems for optimal performance
• Demand response integration: Allowing buildings to adjust energy usage during peak periods, reducing strain on the grid
• Energy analytics and reporting: Enabling facilities managers to track performance and identify opportunities for improvement

Well-implemented control systems can deliver continuous optimisation, helping buildings maintain performance. These technologies not only improve energy efficiency but also enhance user comfort and operational insight. With the rise of smart buildings, data is becoming just as important as design. Data collected from smart systems can inform ongoing improvements and support sustainability reporting.