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E-mail: environment@cso.ie James O'Brien (+353) 1 498 4101 John Golden (+353) 1 498 4218
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CSO statistical release, , 11am

Non-Domestic Building Energy Ratings

Quarter 4 2017

Table A: Building Energy Ratings by Period of Construction (Non-Domestic) 1900-2017
% of row
Period of constructionEnergy rating 
ABCDEFGTotal
1900-19770730261591312,452
1978-199901137231271011,427
2000-200401643199486,895
2005-20091203616751512,666
2010-201482929168371,885
2015-20172739188215758

27% of non-domestic construction between 2015 and 2017 was rated "A"

Figure 1: Building Energy Ratings by Period of Construction (Non-Domestic) 1900-2017
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Building Energy Ratings (BER) audits were conducted for 758 non-domestic buildings constructed between 2015 and 2017 (see Table A). Over one quarter (27%) of these buildings received an “A” rating compared with 8% of non-domestic buildings constructed during 2010 to 2014. The percentage of non-domestic buildings built between 2015 and 2017 receiving a “B” rating was 39% (see Figure 1).  

There were 50,227 non-domestic BER audits conducted in the period 2009 to 2017 (see Table 1). The number of audits for 2017 was 11% lower than the number audited in 2016 (see Table 2). The profile of non-domestic BER audits conducted since 2009 was 1% awarded an "A" rating, 14% a "B" rating, and 35% with a “C” rating (see Table 3).

The most energy efficient building types audited during 2009-2017 were Schools and colleges with 24% awarded an “A” rating (see Table 3). The second most energy efficient buildings were Nursing residential homes and hostels with 7% rated “A”. The least energy efficient building types, defined by a “G” rating, were Workshops and maintenance depots (21%), Warehouses (14%) and Office buildings (13%) (see Figure 3).

The highest proportion of combined “A” and “B” ratings were in County Offaly at 21% (see Table 4). Kilkenny had the highest proportion of “G” rated buildings at 18% (see Table 4).

Dublin 15 had the highest proportion of combined “A” and “B” ratings at 26% compared with 19% for Dublin 18 (see Table 5). Dublin 15 had the lowest proportion of non-domestic buildings with a “G” rating at 4%.  The highest proportions of “G” ratings, at 16%, were located in Dublin 5, Dublin 6W and Dublin 8 (see Table 5).

The primary source of main heating systems used for non-domestic buildings constructed in the period 1900 to 1929 was Electricity at 63%. This proportion decreased to 47% for 2015 to 2017 (see Table 14). In contrast, Mains Gas usage as a main heating system for non-domestic buildings increased from 19% in 1900-1929 to 41% in 2015-2017.

A0.495
B10.87
B22.072
B33.727
C16.168
C25.915
C34.785
D15.918
D24.461
E13.001
E22.365
F3.14
G5.681
ABCDEFG
Retail01442179612
Office19312513813
Restaurant/public house0729361864
Hotel0154327943
Warehouses018331910614
Workshops/maintenance depot092323141021
Industrial process building2352616938
Hospitals and primary health care5152321141012
Community/day centre3273017959
Nursing residential homes and hostels7383016413
Schools and colleges24262218523
Sports facilities2302918859
Other216241812820
Table 1 Building Energy Ratings Certificates (Non-Domestic) 2009-2017
number
Period200920102011201220132014201520162017Total
January451941501934445906343993392,988
February1473261661569466217435535364,194
March2072282012248487408076476984,600
April1652301621788617966336654554,145
May2401892012047888836616475314,344
June3481841981637668576865974624,261
July4081931902437528415955614874,270
August2662871732135757855635874533,902
September2652212182456939986736835954,591
October2362062072898638826826406204,625
November3073032233287139645725305124,452
December3371932113095748534674364753,855
           
Total2,9712,7542,3002,7458,8239,8107,7166,9456,16350,227
Table 2 Building Energy Ratings by Year (Non-Domestic) 2009-2017
number
YearEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
200928117241385447362278278224106851401282,819
201021551812663453562873052051271221291732,572
20114666120208292237214270164110941281412,090
201237511132033753332843242501721181542172,631
2013481153505851,1231,0958681,0358154953595411,0388,467
2014431143046641,2171,1458991,2029066145126511,2819,552
2015811292575189309197198836964984015171,0047,552
2016891072424807718006388406254823764829136,845
20171021162644186686685987815763972983987866,070
               
Total4958702,0723,7276,1685,9154,7855,9184,4613,0012,3653,1405,68148,598
Table 3 Building Energy Ratings by Type of Building (Non-Domestic) 2009-2017
% of row 
Building TypeEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Retail01491715101075461218,666
Office12259111114117681311,058
Restaurant/public house0124811111917117644,541
Hotel016713151417106343705
Warehouses0261012129118546146,740
Workshops/maintenance depot013687814108610211,906
Industrial process building2131210128611554381,070
Hospitals and primary health care54668881110771012816
Community/day centre34111213107975459791
Nursing residential homes and hostels78131813107793113375
Schools and colleges2479109761083323700
Sports facilities26111312881085259421
Other2456108611757820809
               
Total12481312101296561248,598
Table 4 Building Energy Ratings by County (Non-Domestic) 2009-2017
            % of row
CountyEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Carlow028101613109755313611
Dublin 01-24124712121113107561113,265
Dublin County1248151210129556103,526
Kildare3359121310108555121,940
Kilkenny13871410810955418739
Laois124121211811886414569
Longford116911121010976912363
Louth124611128148768151,340
Meath1269131211118555121,607
Offaly1371011121114744610544
Westmeath026816138111065591,086
Wexford114711139119678141,352
Wicklow1341113118128656101,433
Clare0247111191312669111,375
Cork City013512148121264614459
Cork County1248131311129646114,380
Kerry024913149119647121,238
Limerick City1134121271410751014417
Limerick County114813138139667111,750
Tipperary1149161110119657111,310
Waterford City01381514111087598576
Waterford County12691311911855514740
Galway City115511141212977513568
Galway County12581112101110658122,421
Leitrim11611121020108479211
Mayo1158121110128657141,267
Roscommon114710101012984915490
Sligo114615109111073717743
Cavan11471312812886714617
Donegal136810129148755111,215
Monaghan13491191012676716446
               
Total12481312101296561248,598
– No non-domestic unit received this BER rating in this county
Table 5 Building Energy Ratings by Dublin Postal District (Non-Domestic) 2009-2017
% of row 
Dublin Postal DistrictEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Dublin 11125131191511639151,173
Dublin 21134912111412868112,025
Dublin 322681612157841011320
Dublin 414458912151186610571
Dublin 50221013131111675516263
Dublin 6014610910913971113394
Dublin 6W12371571591061116195
Dublin 71234121312131165614588
Dublin 8113411911131076616831
Dublin 911581412121486478532
Dublin 101257816912109868218
Dublin 11247111511111110458602
Dublin 1201351211111710756101,099
Dublin 1312111512111187949169
Dublin 14026715129131053710412
Dublin 15146161816101073334992
Dublin 1614513139111463714175
Dublin 1703382112101396447315
Dublin 180649913121596448734
Dublin 2027710101010127871260
Dublin 2211791517111394346535
Dublin 241349161210129534131,062
               
Total124712121113107561113,265
– No non-domestic unit received this BER rating in this Dublin postal district
Table 6 Building Energy Ratings by Main Space Heating System Fuel (Non-Domestic) 2009-2017
% of row 
Heating System FuelEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Mains Gas23710121091086441412,603
Heating Oil1258121211161275544,842
Electricity01371313101296581229,824
LPG3411131512101075333882
Other4751089710976710447
               
Total12481312101296561248,598
Table 7 Main Space Heating System Fuel by County (Non-Domestic) 2009-2017
% of row 
CountyHeating System FuelTotal
Mains GasHeating OilElectricityLPGOther
Carlow2796121611
Dublin 01-24384570013,265
Dublin County36559013,526
Kildare26864111,940
Kilkenny27135621739
Laois24165712569
Longford9226261363
Louth30861111,340
Meath281159101,607
Offaly18196021544
Westmeath181662311,086
Wexford101468511,352
Wicklow27962111,433
Clare211857311,375
Cork City313641459
Cork County25865214,380
Kerry91569621,238
Limerick City252720417
Limerick County251063111,750
Tipperary181761211,310
Waterford City3146222576
Waterford County23106332740
Galway City1078210568
Galway County111372312,421
Leitrim6286041211
Mayo91967411,267
Roscommon12235843490
Sligo8186751743
Cavan13195882617
Donegal102755621,215
Monaghan14215743446
       
Total2610612148,598
– No non-domestic unit indicated the usage of this main space heating fuel type for this county
Table 8 Main Space Heating System Fuel by Type of Building (Non-Domestic) 2009-2017
% of row 
Building TypeHeating System FuelTotal
Mains GasHeating OilElectricityLPGOther
Retail174781118,666
Office327601111,058
Restaurant/public house282441524,541
Hotel453012121705
Warehouses321155206,740
Workshops/maintenance depot251357421,906
Industrial process building302737331,070
Hospitals and primary health care30135511816
Community/day centre35263352791
Nursing residential homes and hostels403015133375
Schools and colleges42262363700
Sports facilities4394252421
Other30115342809
       
Total2610612148,598
Table 9 Main Ventilation System by Type of Building (Non-Domestic) 2009-2017
% of row 
Building TypeMain Ventilation SystemTotal
Air ConditioningMechanical VentilationNatural Ventilation
Retail4744918,666
Office3565911,058
Restaurant/public house3411554,541
Hotel26866705
Warehouses146806,740
Workshops/maintenance depot145811,906
Industrial process building1912691,070
Hospitals and primary health care20674816
Community/day centre7786791
Nursing residential homes and hostels0793375
Schools and colleges6886700
Sports facilities301555421
Other19675809
     
Total3466148,598
Table 10 Average Floor Area by Type of Building and County (Non-Domestic) 2009-2017
              m2
CountyRetailOfficeRestaurant/ public houseHotelWarehousesWorkshops/ maintenance depotIndustrial process buildingHospitals and primary health careCommunity/ day centreNursing residential homes and hostelsSchools and collegesSports facilitiesOtherAll building types
Carlow4553383742,5889316793,231239216255988707853616
Dublin 01-243671,1283384,0721,3615882,7276433841,3181,7771,410930892
Dublin County2735023555,3981,3621,2683,7914014401,7642,4961,0111,456674
Kildare2303723774,2239886247,1067122682,1741,4661,399507632
Kilkenny2872762812,5591,1576741,4863062351,269710544178506
Laois3352462735,7959035444,7246462501,5162,2611,4891,639604
Longford3822642581,1671,2436796,3774244362,019574707206665
Louth3205533154,7421,2096214,2483032061,3781,5132,212893690
Meath2414012944,1748815081,7885512801,5461,749958246544
Offaly3104532282,1611,0055741,6741773121,5852,654258105597
Westmeath3075542422,2211,4826293,3328192641,1061,8391,177326598
Wexford3014712722,7637936222,0743183401,2261,431689770524
Wicklow2143102882,2907244352,0935413141,4541,691778280466
Clare2224892982,2639264402,387211259641980503460582
Cork City3786562114011,2744292,705172132774948525554
Cork County2896012723,5849784843,1524583471,3211,496830592582
Kerry2652862662,7146963113,4734052697601,077467328488
Limerick City2564012717,6309663681,4545394671,5218546773,383537
Limerick County2914552854,7631,2004473,3939804211,7172,4881,141523679
Tipperary2953452472,5091,7314553,4104113271,1151,105609161608
Waterford City2844573593,7858107471,918141659592591342929524
Waterford County6763242743,3951,3176693,8621721541,6101,212754341816
Galway City2953392174,0506003143,4803006561,4902,677447629547
Galway County2864002663,6431,0884741,8203402391,8901,3391,026444587
Leitrim2428902721,2806055858784338691,16955492
Mayo2642722853,7579986691,9149602511,380560624555490
Roscommon2794382461,9448285494,4757895731,3794376341,064499
Sligo3283982791,2269393673,0201,0372682,1371,510778883542
Cavan2343682502,8066344041,7093833553,0521,136621398425
Donegal2533943082,2601,2165012,7495534101,0301,031667582566
Monaghan2921573504,8119157201,6561425231,4841,8521,0111,450570
               
All3077122983,3431,1545872,8785083361,3811,539989706670
– No data is available for this building type and county
Table 11 Average Primary Energy Use by Type of Building and County (Non-Domestic) 2009-2017
kWh/m2/year
CountyRetailOfficeRestaurant/ public houseHotelWarehousesWorkshops/ maintenance depotIndustrial process buildingHospitals and primary health careCommunity/ day centreNursing residential homes and hostelsSchools and collegesSports facilitiesOtherAll building types
Carlow1,4525898356267507471,028473452248185651741969
Dublin 01-241,0605011,0376374316797374185074022811,177942599
Dublin County1,1095281,0146223466427714543674371461,046749606
Kildare1,2357828891,0044547716862733964831868571,185741
Kilkenny1,2399468935954566676344553724833061,425929775
Laois1,473833949501442792945246438457137987929832
Longford1,3689591,117726505991806347734314234627857863
Louth1,088575970662732763907452548412111764582784
Meath1,1904981,0046276309237822753474541801,711681727
Offaly8764529325535418356074334504231461,167872594
Westmeath1,0257109827495471,4155723534594121595821,438732
Wexford1,6295299698355299795027831,2666831581,191846873
Wicklow970616986802400663577381489558160789805635
Clare1,1626029426516137527281,8835696355541,319833756
Cork City1,146518969691604873469667494476965609752
Cork County1,1345299876625085975324494865761661,057871675
Kerry9987531,0016616076699505123904822361,012797773
Limerick City1,0891,0111,058502730790835365487944281766241791
Limerick County1,1257791,0506747226629384793923751937701,702825
Tipperary9867299427144299068753206313902398471,060725
Waterford City1,3845821,0207453836128564893812482901,192881756
Waterford County1,3526171,1577306185344706417813492151,051731875
Galway City1,0936891,2584855407428843153322681371,074820727
Galway County1,162693923579776726828354414370181850861769
Leitrim9627288768511,0297299714124961661,175783
Mayo1,1608119145615396557322283313953466262,696795
Roscommon2,0134581,1346376086446552947964374101,157639982
Sligo1,5939389535931,0035728843174625342501,1636881,019
Cavan9956321,044646687685809355565405251762950736
Donegal1,1055921,000658650781632342375554182745636727
Monaghan1,0745978447965651,368758575344324212929224760
               
All1,1555479926605097157404054964552101,027898693
– No data is available for this building type and county
Table 12 Average Carbon Dioxide Emissions by Type of Building and County (Non-Domestic) 2009-2017
kgCO2/m2/year
CountyRetailOfficeRestaurant/ public houseHotelWarehousesWorkshops/ maintenance depotIndustrial process buildingHospitals and primary health careCommunity/ day centreNursing residential homes and hostelsSchools and collegesSports facilitiesOtherAll building types
Carlow3441391931421771702411101025241147175228
Dublin 01-2425011423814099155170951158561255220137
Dublin County26112023213979140173100819431229173139
Kildare291183206229106180161629010941184277172
Kilkenny2942212111271061551501028311473334223181
Laois3491952251101041842235410110530189210194
Longford326229266167120227191811757357148194204
Louth2561322261511691752101041238924173136182
Meath28011623513714821518462789842387152169
Offaly2091062221221251981451031069734278205139
Westmeath242167232170127334135811038535134341172
Wexford38712323019412523211918430016137216200205
Wicklow228142231183921561358611212835173184147
Clare274141222150143172168442133143131313197176
Cork City271118224145137197110153109108213136174
Cork County26812323014711813912410311412238223203157
Kerry2361782381501431592261208811356241190182
Limerick City258236246107171188185841082256418254183
Limerick County266182246142168155221106928144180396192
Tipperary233172223160101207207751499055194255170
Waterford City32813423416690141196110775861275204176
Waterford County3201442731531431241081501767346228166204
Galway City26016329711112817621175756430232194172
Galway County27616421913118417119381988241193202181
Leitrim2291742082042471592319812137280186
Mayo27619121713112815717351798683147638188
Roscommon4791062701471441541586119310292264148232
Sligo3792212271392371382117411212460223155241
Cavan236150247149161158191821336759181209173
Donegal26314023815615418114379909342174150170
Monaghan25314220018512732317013879763819538175
               
All2731262321481181651729211510047224209161
– No data is available for this building type and county
Table 13 Building Energy Ratings by Period of Construction (Non-Domestic) 2009-2017
% of row 
Period of ConstructionEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
1900-19290013891016139710125,603
1930-19490024101291511778131,382
1950-196601251010101311878142,588
1967-197701351012111310868132,879
1978-19820225111211139968132,466
1983-19930137131291310767124,426
1994-19990149161511141064564,535
2000-20040151016151211854486,895
2005-200912711141391074351512,666
2010-201488911129810644371,885
2015-20172717129964531115758
               
Total12481312101296561246,083
 
Table 14 Main Space Heating System Fuel by Period of Construction (Non-Domestic) 2009-2017
% of row  
Period of ConstructionFuel TypeTotal
Mains GasHeating OilElectricityLPGOther
1900-1929191563125,603
1930-1949181763211,382
1950-1966231758112,588
1967-1977251953212,879
1978-1982231658212,466
1983-1993231065114,426
1994-199928763114,535
2000-200428565206,895
2005-2009305622112,666
2010-2014301351421,885
2015-20174174751758
       
Total2610612146,083

Background Notes

Non-Domestic Building Energy Ratings

Introduction

The European Union Energy Performance of Buildings Directive (EPBD) contains a range of provisions to improve the energy performance of new and existing buildings. The EPBD obliges specific forms of information and advice on energy performance to be provided to building purchasers, tenants and users for consideration in property transactions. A Building Energy Rating (BER) is an indication of the energy performance of a building represented in units of kWh/m2/year. A BER is based on the characteristics of major components of the building. The BER certificate indicates the annual primary energy usage and carbon dioxide emissions associated with the provision of space heating, water heating, ventilation, lighting, and associated pumps and fans. The average annual primary energy use figures and carbon dioxide emissions are not based on actual energy use and emissions data.

These Background notes provide a very general overview together with some specific information on the detailed tables in the release. The SEAI website should be consulted for detailed information on the non-domestic energy assessment procedure (NEAP), see http://www.seai.ie/Your_Building/BER/Non_Domestic_buildings/Non_domestic_Energy_Assessment_Procedure_NEAP_/

Revisions

The figures in this release will be updated on a quarterly basis. Changes to data for the previous quarters will arise mainly from some buildings having another BER audit undertaken and the previous certificate being marked as expired. The difference in the number of BER certificates included in Tables 1 and 2 gives an indication of the number of buildings that have had more than one BER audit undertaken.

Coverage

Full site surveys have to be carried out for New-final and Existing building assessments. New-provisional ratings do not require a site survey as the assessment is done based on design stage plans – new provisional ratings have been excluded from this release. Some buildings are excluded from the EPBD requirements: national monuments; protected structures; places of worship; temporary buildings; industrial and agricultural buildings not intended for occupancy and below a specified installed heating capacity; and buildings with a total useful floor area of less than 50 square metres. Short-term lettings are not exempt.

A BER for new non-domestic buildings was introduced in July 2008 and for renting of existing non-domestic buildings in January 2009. New regulations came into effect in January 2013 requiring the inclusion of BER information in property sale and rental advertisements.

National representativeness

The data have not been adjusted to represent all non-domestic buildings in the State and hence the tables only represents buildings that have been assessed.

Definitions

The BER rating scale is divided into categories from G (largest primary energy usage) to an A1 rating (lowest primary energy usage). Energy consumption is expressed in kWh per square metre of floor area of the building per year (kWh/m2/year) and CO2 emissions are expressed in kilograms of carbon dioxide per square metre per annum (kgCO2/m2/year). For the purposes of this release A1, A2, and A3 have been combined because of the small number of Certificates in these categories. The certificate is valid for 10 years unless changes are made to the building.


Table Notes

Table 1 presents the number of BERs published by month since January 2009. A premises that has had BERs conducted in different years is included in each year. This table gives an overview of the number of BER assessments being performed each month.

Tables 2-14 only include the latest BER published for each building i.e. the BER is on the public register and is not expired - the number is lower than the total in Table 1 because expired and replaced certificates have been excluded.

Table 2 shows the number of BER certificates by energy rating and year.

Table 3 classifies the number of BER certificates by energy rating and building type. This relates to the current building use and it is displayed on the BER certificate. Some building types have been combined for the purposes of this release e.g. schools and colleges.

Tables 4-5 profile Building Energy Ratings by county and Dublin postal district. Table 4 is in county within province order.

Table 6 profiles Building Energy Ratings by type of main space heating system fuel. The heating system fuel options are: Mains gas; LPG; Biogas; Oil; Electricity; Coal; Biomass; Waste heat; Anthracite; Smokeless fuel; Dual fuel appliances; and Other. Categories with only a small number of responses have been amalgamated in Table 6.

Tables 7-8 cross-classify main space heating system fuel by county and building type.

Table 9 cross-classifies main ventilation system by building type.

Table 10 shows the average floor area by building type and county.

Tables 11-12 show the average primary energy use and average carbon dioxide figures by building type and county.

Table 13 shows the relationship between period of construction and building energy ratings. It can be linked with changes to the Building Regulations that require new buildings to be more energy efficient.

Table 14 cross-classifies main space heating fuel by period of construction.

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