Climate resilience in commercial buildings: what should be reviewed alongside decarbonisation?

For several years, commercial property advice has focused heavily on energy efficiency, EPC improvement and decarbonisation. That remains important, but it is no longer enough on its own.

A building can be lower carbon and still be poorly prepared for hotter summers, heavier rainfall, electrical capacity constraints or plant operating conditions beyond those originally allowed for.

Climate resilience is therefore becoming a practical asset management issue. It affects comfort, lettability, tenant satisfaction, maintenance cost, operational continuity and future capital expenditure.

Why this matters now

Recent UK climate reporting confirms that higher temperatures and more frequent extremes are becoming part of normal operating conditions. Government departments are also being asked to plan for a minimum of 2°C warming by 2050.

For building owners, landlords and managing agents, the question is not whether climate risk exists. The useful question is which buildings are most exposed, what can be improved through sensible interventions, and where capital expenditure should be prioritised.

This is particularly relevant for:

• commercial offices with high glazing ratios

• older buildings with limited ventilation control

• assets relying on ageing cooling plant

• naturally ventilated schools and public buildings

• healthcare and care environments

• retail units with high internal gains

• comms rooms, security rooms and other critical spaces

• buildings being considered for heat pump conversion or wider electrification

  
  

Decarbonisation and resilience need to be considered together

A common mistake is to treat EPC improvement, decarbonisation and overheating as separate workstreams.

For example, replacing gas boilers with heat pumps may reduce carbon emissions, but it can also increase electrical demand. Adding comfort cooling may improve summer conditions, but it can increase peak load, operating cost and network connection risk. Improving airtightness may support energy performance, but it may also increase overheating risk if ventilation and controls are not properly considered.

The strongest asset strategy reviews these issues together.

What should a climate resilience review include?

A practical review should focus on the building as it is actually operated, not only on theoretical design intent.

Key areas include:

Overheating exposure

This should consider solar gain, façade orientation, glazing performance, shading, internal gains, occupancy, operating hours, ventilation strategy and existing cooling provision.

Ventilation and controls

Poor control can make a capable system perform badly. The review should check time schedules, temperature setpoints, zoning, BMS operation, night purge potential, demand control and tenant override arrangements.

Cooling plant and distribution

Existing cooling plant should be reviewed against present and likely future demand. This includes condition, age, refrigerant risk, available spare capacity, resilience, maintenance access and whether terminal units can actually deliver the required output.

Electrical capacity

Electrification is now central to many decarbonisation strategies. Before committing to heat pumps, EV charging, electric domestic hot water or additional cooling, the incoming electrical capacity and peak load profile need to be understood.

Critical rooms

Comms rooms, server rooms, security rooms, risers, plantrooms and lift motor rooms often fail before occupied areas become unmanageable. These spaces should be reviewed separately from general comfort conditions.

Water and drainage resilience

Heavier rainfall, local flood risk, drainage capacity, plant location, basement services and attenuation should be reviewed where relevant, particularly for refurbishments and acquisition due diligence.

Maintenance and operational readiness

Some resilience improvements are not major capital projects. They may involve controls tuning, recommissioning, filter regimes, access improvements, BMS alarms, seasonal changeover procedures or clearer operating instructions.

What this means commercially

For landlords and asset managers, climate resilience is becoming part of protecting asset value.

The commercial risks include:

• tenant complaints and reduced satisfaction

• increased service charge pressure

• plant failures during hot weather

• higher reactive maintenance cost

• reduced letting appeal

• future capex shocks

• insurance and operational continuity concerns

• difficulty implementing decarbonisation measures where electrical capacity is constrained

  
  

The opportunity is to move from reactive problem-solving to planned improvement.

A proportionate review can help identify low-cost operational changes, medium-term planned maintenance actions and longer-term capital works. It also gives owners better evidence when setting budgets or explaining priorities to occupiers and stakeholders.

How J-WEBS can help

J-WEBS provides practical climate resilience reviews for commercial buildings, public buildings and mixed-use assets.

Our reviews can be standalone or included within:

• technical due diligence

• planned preventative maintenance reviews

• EPC improvement studies

• decarbonisation strategies

• refurbishment feasibility studies

• landlord asset reviews

• MEP condition surveys

  
  

The aim is not to produce a theoretical climate report that sits on a shelf. The aim is to identify realistic engineering actions that improve building performance, reduce risk and support better capital planning.

For building owners and managing agents, the next sensible step is to identify which assets are most exposed and review them before the next period of extreme weather turns a known risk into an urgent problem.