Alice Williams, VP digital energy Schneider Electric UK&I looks at how retrofit can work.
Building owners and estate managers across the UK are facing a difficult balancing act. They are expected to reduce energy consumption, improve occupant comfort, meet sustainability targets and extend the life of existing assets, all while operating within increasingly constrained budgets.
Most understand that retrofitting buildings is a critical part of the solution. Yet many projects never move beyond the planning stage. Teams become caught between competing priorities, uncertain where to start or concerned about the disruption and investment required.
The challenge is particularly acute across large property portfolios. Buildings often contain a mixture of ageing plant, varying control systems and inconsistent levels of operational data. Some sites have modern building management systems and detailed performance information, while others rely on little more than manual checks and reactive maintenance. Faced with such variation, it can be tempting to delay action until a comprehensive survey has been completed and a long-term roadmap agreed.
The problem is that waiting for perfect information often becomes an excuse for inaction.
Meanwhile, buildings continue to waste energy, equipment performance deteriorates and maintenance costs increase. By the time major failures occur, organisations are often forced into expensive capital replacement programmes that could have been avoided or deferred.
The most effective retrofit strategies take a different approach. Rather than waiting for complete visibility, they start with the level of readiness that already exists, demonstrate measurable outcomes quickly and then scale proven approaches across the wider portfolio.
A practical three-tier approach
One reason retrofit programmes stall is the assumption that every building must be treated the same way. In reality, different assets require different levels of intervention depending on their current state.
A practical approach is to categorise buildings into three broad groups.
The first group consists of buildings with limited operational data and little existing digital infrastructure. These sites often represent the biggest uncertainty, but they should not be ignored. Temporary monitoring, targeted assessments and basic performance reviews can quickly identify significant opportunities for improvement. Even relatively simple actions, such as correcting schedules, addressing out-of-hours operation or resolving obvious control issues, can deliver measurable savings.
The second group includes buildings that already have some degree of connectivity and controls capability. Here, the focus shifts towards optimisation. Existing systems can often be tuned to perform more effectively, while analytics and fault detection tools can identify hidden inefficiencies that would otherwise remain unnoticed. In many cases, substantial energy reductions can be achieved without major capital investment.
The third group comprises assets that are already being considered for larger-scale upgrades or refurbishment projects. These buildings may justify investment in new equipment, advanced controls or broader decarbonisation measures. However, decisions should be informed by operational evidence gathered from the earlier stages rather than assumptions about performance.
This tiered approach enables organisations to take immediate action across an entire portfolio instead of waiting until every building reaches the same level of readiness.
Turning insight into action
Collecting data is important, but data alone does not improve building performance.
Many organisations have invested in dashboards, analytics platforms and monitoring tools only to find that energy performance remains largely unchanged. The reason is simple: insight creates value only when it leads to action.
Fault detection software may identify inefficient plant operation, but savings will not materialise unless maintenance teams receive clear priorities and work orders are generated. Analytics may reveal opportunities to optimise set points or operating schedules, but someone still needs responsibility for implementing those changes and verifying the results.
Successful retrofit programmes create a direct connection between building insights and operational workflows.
This means integrating performance information into the day-to-day activities of facilities teams. It means ensuring that identified faults are prioritised according to their business impact. It means measuring whether corrective actions have delivered the expected outcomes. Most importantly, it means treating building performance as an ongoing operational discipline rather than a one-off project.
When this connection is established, organisations move beyond simply identifying problems and begin creating a continuous cycle of improvement.
Creating a model that scales
Perhaps the biggest challenge facing portfolio managers is moving from isolated successes to portfolio-wide transformation.
Many organisations can point to individual buildings where energy savings have been achieved. Far fewer have developed a repeatable process capable of delivering consistent results across dozens or hundreds of sites.
The answer lies in standardisation.
Rather than creating unique strategies for every building, organisations should establish a small set of common performance indicators and decision-making rules. These might include metrics related to energy intensity, comfort performance, maintenance responsiveness and asset health.
By applying the same framework across the portfolio, teams gain a consistent basis for prioritisation and investment decisions. Performance becomes easier to compare. Opportunities become easier to identify. Business cases become easier to justify.
Importantly, standardisation also makes retrofit programmes more fundable. When building owners can demonstrate a repeatable methodology and a proven record of delivering outcomes, securing future investment becomes significantly easier.
Over time, this creates a virtuous cycle. Early projects generate measurable savings and operational improvements. Those results build confidence and support additional investment. Each subsequent phase benefits from the lessons learned previously.
Progress over perfection
The pressure on building owners is unlikely to ease. Expectations around energy efficiency, sustainability and occupant experience will continue to grow, while many estates will be required to achieve more with limited resources.
In this environment, the greatest risk is often not making the wrong retrofit decision. It is making no decision at all.
The organisations achieving the strongest results are not waiting for perfect surveys, complete datasets or fully developed masterplans. They are starting with the information available today, taking practical action where they can and building momentum through measurable outcomes.
Retrofit success is rarely achieved through a single transformational project. More often, it comes from a series of incremental improvements that accumulate over time.
For portfolio managers and heads of estates, the message is clear: stop waiting for perfect conditions. Start where you are, prove what works and scale from there.