Energy & Sustainability
Decarbonisation of an estate, portfolio or building's energy use and carbon emissions is a key step in net-zero pathways, reducing running costs and decreasing carbon emissions. Through expert analysis, dynamic simulation and consultation our team can create a full decarbonisation plan for your assets.
Vision Energy provide building decarbonisation strategies for existing residential, commercial and mixed-use buildings across the UK. Our assessments combine dynamic thermal modelling, EPC analysis and real building performance data to identify practical, cost-effective pathways to reduce energy use, operational carbon emissions and running costs.
Unlike standard energy audits based purely on benchmarks and assumptions, our approach uses calibrated modelling wherever possible to better reflect how the building actually performs in operation. This allows us to provide more reliable recommendations and clearer investment guidance for building owners, developers, charities, asset managers and commercial occupiers.
Our decarbonisation strategies can support:
EPC improvement and MEES compliance Net zero carbon planning Refurbishment and retrofit projects Operational energy reduction Capital investment decisions Long-term asset management planning Funding and grant applications ESG and sustainability targets
Vision Energy tailor each decarbonisation strategy to the building, its use and the client’s objectives. Assessments can range from targeted energy studies through to full dynamic building modelling and phased retrofit roadmaps.
Site Survey & Building Review
We carry out a detailed review of the building fabric, glazing, heating and cooling systems, controls and overall operation of the building. Where available, we also review existing EPCs, utility data, maintenance records and previous reports to establish a clear baseline understanding.
Dynamic Thermal Modelling
Using IES VE dynamic simulation software, we model the building based on its real operation, occupancy patterns and heating requirements. Where energy bills are available, the model can be calibrated against actual energy consumption to improve the accuracy of the analysis.
Scenario Testing & Energy Analysis
A range of improvement measures can then be tested, including:
Glazing upgrades Insulation improvements HVAC upgrades Controls optimisation Renewable technologies Lighting improvements
This allows us to understand the likely impact of each measure on:
Energy consumption Running costs Carbon emissions Occupant comfort EPC performance Cost, Carbon & Payback Assessment
Each option is reviewed against indicative capital costs, operational savings and carbon reduction to provide a clear understanding of likely payback periods and investment value. For larger projects, embodied carbon and whole-life carbon impacts can also be assessed.
Recommendations & Roadmap
The final strategy provides clear, prioritised recommendations showing which measures are likely to deliver the greatest benefit, alongside suggested phasing and next steps for implementation.
Our building decarbonisation studies can include:
Many building energy assessments rely heavily on standard assumptions and benchmark data. While suitable for compliance calculations, these methods do not always reflect how a building performs in real operation.
Dynamic thermal modelling allows Vision Energy to simulate:
This provides a more realistic understanding of energy performance and allows improvement measures to be assessed with greater confidence.
A building decarbonisation strategy is a structured assessment of how an existing building can reduce its energy use, operational costs and carbon emissions over time. This typically includes reviewing the building fabric, heating and cooling systems, controls, occupancy patterns and overall energy performance to identify practical improvement measures.
We can carry out decarbonisation assessments for a wide range of existing buildings, including:
An energy audit is usually a high-level review of energy use and potential savings opportunities. A decarbonisation strategy goes further by using building modelling and detailed analysis to assess upgrade options, capital costs, operational savings, EPC improvements and long-term carbon reduction pathways.
Yes, wherever possible we use actual utility data such as gas and electricity bills to better understand how the building performs in operation. This allows us to calibrate our modelling and provide more reliable recommendations rather than relying purely on standard assumptions.
Dynamic thermal modelling is an advanced simulation method used to predict how a building performs throughout the year. It considers factors such as occupancy, heating setpoints, solar gains, glazing performance and ventilation to create a more realistic picture of energy use and comfort conditions.
Standard EPC and SBEM calculations are primarily designed for compliance and use standardised assumptions. Dynamic modelling allows us to simulate how the building actually operates, helping to identify more accurate energy savings, overheating risks and investment opportunities.
Yes. We regularly assess the impact of glazing upgrades alongside other potential improvements such as insulation, heating controls and HVAC upgrades. We compare indicative costs, energy savings, carbon reduction and payback periods to help clients understand whether replacement is likely to represent good value.
Yes. Where required, we can assess how different improvement measures are likely to affect the building’s EPC rating and whether they may support future compliance requirements such as MEES.
Yes. Our studies can include indicative capital cost ranges, estimated energy savings, carbon reductions and simple payback periods to support early-stage investment decisions.
Our assessments provide indicative cost ranges based on industry benchmarks and comparable projects. These are intended to support feasibility and decision-making at an early stage. Detailed construction costs would normally be developed later with contractors or quantity surveyors.
Yes, for more detailed studies we can assess both operational carbon emissions and embodied carbon impacts associated with replacement materials, systems and refurbishment works.
Yes. For larger or long-term projects, we can develop phased decarbonisation roadmaps to help clients understand which measures should be prioritised and how improvements can be implemented over time.
Typically we request:
However, we can still undertake assessments where information is limited.
Costs vary depending on the size of the building and the level of detail required. We offer anything from high-level energy audits through to fully modelled decarbonisation strategies with detailed scenario testing and phased recommendations.
Smaller studies can often be completed within 1–2 weeks, while larger or more detailed projects may take several weeks depending on the complexity of the building and the availability of information.
Vision Energy work with:
Whether you require an initial energy audit or a full building decarbonisation strategy, our technical team can provide practical and commercially focused guidance tailored to your project.
To discuss a building decarbonisation strategy, retrofit assessment or energy modelling project, contact Vision Energy today.