Building Energy Rating (BER)

A BER is a measure of how energy efficient a building is. It takes into account the annual consumption of energy for space heating, water heating, ventilation, lighting and associated fans and pumps.

The BER scale runs from A-G. For example, an A-rated house is the most energy efficient, while a G-rated house is the least energy efficient.

All dwellings that received planning permission since January 1st 2007 must have a BER Certificate, and all new homes must have a certificate before they are occupied. Any other dwellings or buildings that are for sale or letting since January 1st 2009 also require a BER certificate.

If you need to get a BER certificate for your home, you can find a list of assessors that have been registered with SEAI on the SEAI website.

See this video for more information.

BER Ratings 2009 - 2017

The cumulative total of BER audits conducted from January 2009 to July 2017 was 768,788. Basements were by far the least energy efficient dwellings over this period with the highest combined "F" and "G" rating of 40% and lowest combined "A" and "B" rating of 4%In contrast, only 6% of mid-floor apartments received either an "F" or "G" rating, while 30% received a "B" rating or higher.

Detached and semi-detached houses were the most common dwelling types to be audited since 2009, each representing about 26% of the total number of audits. They also had similar energy ratings with approximately 50% of each dwelling type receiving a rating of “C” or higher. 

Dublin County had the highest combined “A” and “B” rating at 22%. In contrast, Offaly had the highest proportion of combined “F” and “G” rating at 20%.

Overall, Heating Oil and Mains Gas were the two most prevalent main space heating systems accounting for 78% of all dwellings audited (39% each), followed by Electricity at 15%.

Dwellings constructed in the period 1900-1929 had the highest average primary energy use (408 kWh/m2/year), as well as, average carbon dioxide emissions (101 kgCO2/m2/year).

Further information on BER Ratings between the period 2009 - 2017, please go to the Central Statistics Office website here.

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