Unveiling the Future of Energy Performance: Key Changes to EPCs and RdSAP 10 Effective June 15th 2025

The world of energy performance certificates (EPCs) is on the verge of a substantial shift with the rollout of RdSAP 10, effective June 15th, 2025. Staying informed about these changes not only benefits homeowners and landlords but also guides energy assessors in their crucial roles. With rising worries about energy efficiency and environmental sustainability, understanding these updates is essential for making responsible property decisions.

Understanding Energy Performance Certificates (EPCs)

Energy Performance Certificates (EPCs) are essential for assessing a building's energy efficiency. They inform homeowners and potential buyers about energy use, estimated costs, and carbon emissions. The grading system ranges from A (most efficient) to G (least efficient), helping people make informed and eco-friendly choices.

As the industry prepares for the RdSAP 10 transitions, the grading system will become more accurate, reflecting real-world energy efficiency more effectively. This enhancement aligns with national energy goals and encourages better energy performance among properties.

What is RdSAP 10?

RdSAP, or the Reduced Data Standard Assessment Procedure, is the method for producing EPCs for existing homes. The forthcoming RdSAP 10 aims to enhance accuracy, streamline data collection, and provide a clearer picture of a building's energy performance.

This new version will empower assessors to evaluate properties with greater detail, making it easier for homeowners and prospective buyers to understand energy-efficient options.

Key Changes Under RdSAP 10

Enhanced Data Accuracy

RdSAP 10 emphasises precise data collection. The new version incorporates a more detailed approach for assessors, enabling them to gather comprehensive information about properties. For instance, measures like inputting local climate data can improve accuracy.

Homeowners can expect EPC assessments to better mirror their properties' actual energy performance, leading to more effective upgrades.

Improved Building Assessment

The new methodology focuses on thoroughly evaluating the building's thermal performance. Assessors can now analyse walls, roofs, floors, and windows using advanced tools that consider material types, insulation levels, and installation quality.

For example, homes with upgraded insulation can see energy use decrease by up to 30%, encouraging homeowners to consider necessary renovations to improve overall efficiency.

Introducing Decarbonisation Measures

Decarbonisation is a key focus of RdSAP 10. This version will motivate assessors to suggest strategies for lowering carbon emissions in existing homes.

For example, the new EPCs may highlight the benefits of adopting renewable technologies like solar panels or heat pumps. In fact, homes using solar energy can reduce electricity costs by 70% and even qualify for government incentives.

Enhanced Recommendations for Improvement

The new RdSAP version will provide tailored energy improvement suggestions, moving away from generic recommendations. Assessors will create customised improvement plans according to individual properties' needs.

This personalised approach not only aids homeowners in making informed energy decisions but may also enhance their properties' market value, with energy-efficient homes selling for an average of 10% more than their less efficient counterparts.

Why These Changes Matter

The updates brought by RdSAP 10 are vital for achieving national and global commitments to reduce carbon emissions and combat climate change. Buildings constitute a significant portion of greenhouse gas emissions. By enhancing energy efficiency, we can make a meaningful impact.

Additionally, as these changes roll out, the real estate market will be affected. Properties with higher energy performance ratings are likely to attract more buyers, leading to increased selling prices and a higher demand for sustainable homes.

Compliance and Preparation

With RdSAP 10 on the horizon, homeowners, landlords, and property managers need to prepare for these changes. Familiarising yourself with new requirements can help ensure compliance and bolster property desirability.

Starting efforts to upgrade insulation, improve heating systems, or implement renewable energy options should be prioritised. Proactive steps can maximise energy performance and reduce future heating and cooling costs.

Training for Energy Assessors

To successfully implement RdSAP 10, energy assessors must receive comprehensive training. Developing proper programs will equip assessors with the skills necessary to adapt to the new methodologies.

This training will ensure that the assessment process remains consistent and trustworthy, providing homeowners with accurate and useful insights into energy performance.

Moving Forward in Energy Efficiency

The upcoming RdSAP 10 changes signify a major leap toward better energy efficiency and sustainability across the housing sector. Enhancements in data precision, more thorough building fabric evaluations, and emphasis on decarbonisation prepare us for a future where energy performance is central to property decisions.

As June 15th, 2025 approaches, it is essential for stakeholders—homeowners, landlords, energy assessors, and policymakers—to stay informed and ready for this critical shift. Adopting these changes will create a more sustainable, energy-efficient environment, benefiting property owners and the planet alike.

Vibrant green landscape showcasing modern energy efficient buildings

By actively embracing these new standards, individuals can take charge of energy performance, contributing to a healthier planet while making smart property choices.