Understanding Ireland's New BER Rating Scale: What the Changes Mean for Homeowners
- Mihai
- 21 hours ago
- 4 min read
Ireland's Building Energy Rating (BER) system has undergone one of its biggest updates in recent years. While the familiar A–G rating remains, the way these ratings are grouped has changed to align with the revised European Energy Performance of Buildings Directive (EPBD).
If you're planning to sell, rent or upgrade your home and require a BER Certificate in Dublin or a BER assessment in Dublin, it's important to understand what these new ratings mean.
Let's take a closer look at how the new BER scale compares with the previous one.
🏡 Why Has the BER Scale Changed?
The revised BER rating system has been introduced to:
Align Ireland with the revised EU Energy Performance of Buildings Directive (EPBD).
Simplify the BER scale.
Better identify the poorest-performing buildings.
Introduce the new A0 rating for Zero-Emission Buildings (ZEBs).
Support Ireland's long-term decarbonisation targets.
The calculation methodology remains largely unchanged, but the way the ratings are displayed has been simplified.
🌟 Introducing the New A0 Rating
One of the biggest changes is the introduction of the new A0 rating.
Unlike previous A1, A2 and A3 ratings, A0 is reserved for Zero-Emission Buildings (ZEBs) that satisfy the latest European performance requirements.
We've covered the A0 rating in more detail in one of our previous articles.
📊 What Happens to the Existing BER Ratings?
The previous 15-band system (A1–G) has now been simplified into 8 bands:
A0
A
B
C
D
E
F
G
Rather than simply renaming the ratings, the boundaries have been adjusted.
🏠 The New G Rating Represents the Least Efficient Homes
One of the most significant changes concerns the G rating.
Under the new system:
G now applies to dwellings with a primary energy consumption greater than approximately 375 kWh/m²/year (as illustrated in the updated BER scale).
This means the new G rating broadly corresponds to what was previously an F-rated property, representing the poorest-performing portion of Ireland's housing stock.
The intention is for the G band to identify the homes with the greatest opportunity for energy improvements.
🔄 How the Other Ratings Compare
The revised rating bands broadly map across the previous BER system.
For example:
New BER Rating | Approximately Equivalent Previous Rating |
A0 | New Zero-Emission Building (ZEB) classification |
A | Similar to previous A1–A3 range |
B | Similar to previous B1–B3 range |
C | Similar to previous C1–C3 range |
D | Approximately equivalent to previous D1 |
E | Similar to previous D2/E1 |
F | Similar to previous E2 |
G | Similar to previous F |
The exact boundaries have been adjusted to create more balanced rating bands while highlighting the least efficient dwellings.
📈 Why Were D, E and F Changed?
The middle and lower BER bands have been slightly rebalanced.
This helps create a smoother transition between the better-performing homes and the new G category.
Rather than having an extremely broad lower end of the scale, the revised bands provide a more even distribution across the ratings.
🏠 What Does This Mean for Homeowners?
If your home previously achieved:
A or B – your rating is unlikely to change significantly.
C – you will generally remain within the C band.
D or E – your rating may now fall into a slightly different band under the revised scale.
F – your property may now appear as a G under the new system.
Importantly, this does not necessarily mean your home has become less energy efficient.
Only the way the rating is presented has changed.
🔍 Will My Existing BER Certificate Change?
No.
Existing BER Certificates remain valid until they expire or a new assessment is carried out.
However, any new BER assessment completed using the updated methodology will display the revised rating scale.
👷 Need a BER Certificate in Dublin?
At MTS DNC Energy Consultants, we provide professional:
BER Certificates in Dublin
BER Assessments in Dublin
Domestic BER Assessments
Commercial BER Assessments
Heat Pump Technical Assessments
Part L Compliance
Building Energy Consultancy
Our registered BER Assessors work throughout Dublin, including:
Malahide, Portmarnock, Swords, Donabate, Lusk, Rush, Skerries, Balbriggan, Clontarf, Raheny, Glasnevin, Santry, Tallaght, Dundrum, Blackrock, Dún Laoghaire and surrounding areas.
Whether you're selling, renting, applying for an SEAI grant or planning energy upgrades, we can provide a fast and professional BER assessment.
👉 Contact us today for expert advice or to schedule your BER assessment.
For further inquiries or assistance, feel free to contact us.
Final Thoughts
The new BER rating system simplifies Ireland's Building Energy Ratings while supporting the transition towards Zero-Emission Buildings.
Although the letters on your certificate may change, the objective remains the same: helping homeowners understand their property's energy performance and encouraging improvements that reduce energy bills and carbon emissions.
If you're looking for an experienced BER assessor in Dublin or require a BER Certificate in Dublin, MTS DNC Energy Consultants are here to help.
Disclaimer:
The information provided in these posts is for informational purposes only and should not be considered design advice, specifications, or a calculation template. We assume no responsibility or liability for the use of the information presented. For professional advice or design services, please contact us via our contact form.
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