Adding an extension or conservatory can enhance your home’s space, comfort, and value. However, these building works have important implications for your property’s energy performance and Energy Performance Certificate (EPC). Understanding the planning and compliance requirements will help you avoid pitfalls and maintain or improve your EPC rating.
This article outlines key considerations when adding extensions or conservatories, focusing on EPC impacts and how to ensure smooth compliance.
Do Extensions and Conservatories Require an EPC?
Yes. When you add an extension or conservatory that involves building work, an updated EPC is generally required if you plan to sell or rent the property afterward. This ensures the entire property’s energy efficiency reflects the changes.
How Extensions and Conservatories Affect EPC Ratings
1. Building Fabric and Insulation
New walls, floors, and roofs must meet current building regulations for insulation and airtightness, which influences EPC calculations.
2. Heating and Ventilation Systems
Extensions may require extending or upgrading heating and ventilation systems. Efficient designs help maintain good EPC scores.
3. Glazing and Window Types
Conservatories often have large glazed areas. Using energy-efficient glazing (e.g., double or triple glazing, Low-E coatings) is essential to reduce heat loss and improve EPC ratings.
4. Thermal Bridging and Airtightness
Proper detailing to avoid thermal bridging and ensure airtight construction is critical to prevent energy losses that impact EPC outcomes.
Planning and Compliance Tips to Optimize EPC After Extensions
1. Consult Building Regulations Early
Ensure your extension or conservatory complies with the latest energy efficiency and building standards.
2. Work With Accredited EPC Assessors
Use assessors familiar with extension-related EPC assessments to get accurate ratings and advice.
3. Consider Energy-Efficient Materials and Systems
Invest in quality insulation, energy-efficient windows, and modern heating solutions to improve overall energy performance.
4. Document Changes for EPC Assessors
Provide detailed plans, specifications, and installation certificates to the EPC assessor for precise assessment.
How EPCRate Supports Your EPC Compliance for Extensions and Conservatories
At EPCRate, our London-based EPC assessors have extensive experience evaluating properties with recent extensions or conservatories. We ensure your updated EPC accurately reflects your building’s energy performance and compliance with regulations.
Explore our services or book an assessment with clear pricing.
Contact EPCRate for Expert EPC Services in London
Planning an extension or conservatory? Contact EPCRate via our contact page for expert EPC assessments and compliance advice tailored to your project.
