Have you received an EPC report that doesn’t reflect your property’s true energy efficiency? Missing insulation details, incorrect boiler data, or overlooked heating controls can cause a lower EPC rating, which may negatively impact your property’s sale or rental value.

The good news? You can challenge an EPC rating in the UK and correct inaccuracies.

In this guide, we’ll explain:

  • How to correct EPC data

  • The process to challenge an EPC rating

  • How to prevent EPC mistakes in the first place

Can You Challenge an EPC Rating in the UK?

Yes. If you believe your EPC contains missing, incorrect, or outdated information, you can:

  1. Request a correction from the original EPC assessor.

  2. Commission a new EPC survey with accurate data.

  3. Lodge a formal complaint if the original assessment was negligent.

➡️ Need a second opinion on your EPC? Book an expert assessment with EPCrate.

Common EPC Data Errors That Need Correction

  • Insulation upgrades not recorded (walls, lofts, floors)

  • Incorrect boiler model or heating system efficiency

  • Unverified glazing specifications

  • Overlooked programmable thermostats or heating controls

  • Mechanical ventilation systems (MVHR) omitted

  • Property dimensions inaccurately measured

➡️ Learn how missing data can silently lower your EPC rating.

Steps to Correct an EPC with Missing or Incorrect Information

1. Contact the Original Assessor

Start by discussing discrepancies with the EPC assessor who issued the report. Provide any missing documentation (e.g., insulation certificates, heating system manuals) and request a corrected EPC submission.

🔔 Important: Assessors are required to amend EPCs if provided with valid evidence post-assessment.

2. Request an EPC Correction via the Accreditation Body

If the assessor refuses or disputes the correction:

  • Identify their accreditation scheme (listed on the EPC report)

  • File a formal complaint with the scheme, providing evidence of inaccuracies

  • The scheme will investigate and may instruct the assessor to update the EPC

3. Commission a New EPC with a Detailed Survey

If the original assessor’s correction process fails:

  • You can commission a new EPC assessment with a different, experienced assessor.

  • Ensure you provide all relevant documentation upfront.

➡️ Book a corrective EPC assessment with EPCrate to ensure accuracy.

4. Document Everything

Keep a record of:

  • Emails with the assessor

  • Evidence provided (certificates, photos)

  • Complaint correspondence with accreditation bodies

This ensures you have a paper trail if escalation is needed.

How EPCrate Ensures Data Accuracy in Your EPC

At EPCrate, we:

  • Conduct thorough inspections to minimise default assumptions

  • Review all available documentation to ensure accurate data input

  • Offer EPC correction surveys for properties affected by assessor errors

➡️ See our full EPC assessment services
➡️ View transparent EPC pricing

How to Avoid EPC Mistakes from the Start

a) Prepare Documentation Before Assessment

Ensure you have:

  • Cavity wall insulation records

  • Boiler installation certificates and manuals

  • Window/glazing specifications

  • MVHR commissioning certificates

b) Choose Experienced Assessors Who Understand Defaults

Opt for assessors who:

  • Actively minimise ‘Unknown’ entries

  • Go beyond basic visual inspections

  • Understand how to input non-standard materials correctly

➡️ Hire EPCrate for a data-accurate EPC survey.

Conclusion: Don’t Let EPC Errors Devalue Your Property

Incorrect or incomplete EPC data can unfairly lower your property’s rating, impacting its market value, mortgage options, and rental compliance.
You have the right to challenge an EPC rating in the UK and ensure your property’s energy performance is accurately reflected.

For professional EPC correction surveys and expert guidance, EPCrate is here to help you correct EPC data quickly and reliably.

➡️ Contact EPCrate to fix EPC inaccuracies.