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Extra information
Methodology Previous Releases
International comparison:
See also:
YouTube Video
For more information on this release:
E-mail: environment@cso.ie Berna Lawlor (+353) 1 4984210 Gerry Brady (+353) 1 4984201
For general information on CSO statistics:
information@cso.ie (+353) 21 453 5000 On-line ISSN 2009-7441
CSO statistical release, , 11am

Domestic Building Energy Ratings

Quarter 2 2015

% of row
Period of constructionEnergy rating
ABCDEF-G
1700-19770318252033
1978-1999043837147
2000-200408582483
2005-2009136481131
2010-201540535100

Limerick City and Tipperary have lowest proportion of BER A or B Energy Ratings

BER by Period of Construction Q2 2015 Figure 1
go to full release

Limerick city at 5% and Tipperary at 6% have the lowest proportion of A or B rated Domestic Building Energy Ratings (BER) in Ireland. Other counties with a low proportion of A or B ratings include Offaly, Waterford City, Galway City, and Roscommon which all have 7% of dwellings with an A or B BER rating.

In Dublin 18, 36% of dwellings have an A or B rating followed by Dublin 20 (25%) and Dublin 11 (23%).

Areas with higher proportions of new dwellings and of apartments tend to have higher ratings. For example, 40% of all dwellings built during 2010-2015 with a BER rating were awarded an A. Mid-floor apartments are more energy efficient and 29% of all mid-floor apartments have an A or B BER rating. Basement dwellings perform poorly with only 3% of all BER rated basements receiving an A or B rating. Some of the most highly-rated dwellings use Wood Pellets and Chips as their main space heating fuel.

This release contains a new experimental analysis of the 139 Eircode routing keys. The Eircode routing keys correspond with An Post’s principal postal towns. The Background Notes in this release contains a table with an indication of the main county locations of each routing key. Table 16 shows the proportion of A-B, C-D, and E-G BER ratings in each routing key for properties that have already been assigned an Eircode (around 61% of dwellings with a BER rating were assigned an Eircode in preparation for the launch of Eircodes). The routing keys allow energy efficiency to be examined at a more detailed level than county. Around 26% of dwellings in routing key T45 (Glanmire and Carrigtwohill) in County Cork had an A or B rating. There are 2,152 dwellings in T45 in the subset of the SEAI file with pre-assigned Eircodes (this represents 28% of the number of dwellings pre-assigned an Eircode in the 2011 Census of Population in this area).

Conversely D03, D06, D07, and D12 all have around 50% of dwellings with an E to G BER rating. Outside of the traditional Dublin Postal Districts, areas E34 (Tipperary Town), E41 (Templemore/Thurles), and R42 (Birr/Banagher) all have relatively high levels of E to G BER ratings.

Table 16 also shows: the number of dwellings with a BER rating that were pre-assigned an Eircode in each routing key area; the average age of those dwellings (this is an important determinant of the rating); and the number of dwellings from the 2011 Census of Population that have been pre-assigned an Eircode (around 95% of Census occupied and vacant dwellings). The relative coverage in each routing key varies widely and this should be taken into account in interpreting the table. For example, an area with a high proportion of rental, recently built, or for sale dwellings would have a higher proportion of BER ratings. Conversely an area with a high proportion of older family farms may have a lower percentage of dwellings with a BER rating and hence the profile may not be fully representative of the whole area.

Table 1 Domestic Building Energy Ratings Certificates 1
number
Period2009201020112012201320142015Total
January4,1004,6678,5596,5226,9677,0006,61644,431
February6,3215,6129,0186,2948,5227,5347,80551,106
March8,7636,1538,9366,5068,2048,3787,40454,344
April8,0315,4827,7774,4398,2958,7337,69850,455
May7,9225,4778,8695,8728,6468,7287,80453,318
June8,7295,7327,4604,8647,2628,2187,76650,031
July8,7715,9757,2545,5367,0969,393 44,025
August7,2716,4577,5315,0506,9748,163 41,446
September7,5187,4258,8734,9788,2789,915 46,987
October6,5978,4069,5726,6878,98410,776 51,022
November6,98111,6199,6268,8249,61010,913 57,573
December6,3518,0429,4836,3706,9427,788 44,976
         
Total87,35581,047102,95871,94295,780105,53945,093589,714
         
1Includes all Certificates for Dwellings
Table 2 BER Ratings by Period of Construction
% of row
Period of ConstructionEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
1700-18990011234710910153814,024
1900-19290012234710910143828,702
1930-194900124569131010142626,821
1950-1966001246812141111131841,914
1967-19770012691216171199856,148
1978-198200138121519181065439,008
1983-19930013812152019954363,865
1994-19990014914192115754267,878
2000-200400171521221595321100,916
2005-200914112223179642110102,330
2010-201540301583211000009,608
               
Total113711131313127557551,214
               
Table 3 BER Ratings by Type of Dwelling
% of row
Dwelling TypeEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Apartment12101312710111166574,294
Ground-floor apartment01371010911141187732,172
Mid-floor apartment151112111212129533339,871
Top-floor apartment0149989121510761033,150
Basement Dwelling  125275612111139132
Maisonette0281113109101474575,463
House12391214141311544839,002
Detached house1127111314141265510140,048
Semi-detached house111510141616137655140,035
End of terrace house11151013131312777938,785
Mid-terrace house11281213121212866878,262
               
Total113711131313127557551,214
               
Table 4 BER Ratings by County
% of row
CountyEnergy Rating Average Age
AB1B2B3C1C2C3D1D2E1E2FGTotal
Carlow0127121414151165577,77728
Dublin 01-2412479111113138777122,73135
Dublin County42581113131311655538,37427
Kildare21381214151512644520,40323
Kilkenny0127121313141275599,39633
Laois012910141412966698,37829
Longford0127111212151176795,02725
Louth13481315141310644614,11730
Meath12391416151310543515,66324
Offaly0124812121112989117,21234
Westmeath013810121414116561010,29328
Wexford0125914151513855818,61327
Wicklow11371012131312866915,27332
Clare0016913151413865816,22730
Cork City11481112121312755812,01741
Cork County124111414121110544751,35131
Kerry01371113141412755818,90127
Limerick City0013111415151575678,89035
Limerick County00261114151514755718,87431
Tipperary01149121314138671119,30138
Waterford City0124101215181575465,44534
Waterford County0126111314161474569,52132
Galway City012471216181596557,47924
Galway County01261114151312765825,54726
Leitrim00261214131211667124,04830
Mayo11258141614136561014,88929
Roscommon00151114161211756116,38830
Sligo112791112141396699,44729
Cavan012914161312965588,07725
Donegal01261315141311645815,90526
Monaghan0138121112151375585,65033
                
Total113711131313127557551,21431
                
Table 5 BER Ratings by Dublin Postal District
% of row
CountyEnergy Rating Average Age
AB1B2B3C1C2C3D1D2E1E2FGTotal
Dublin 1036791011121396575,66428
Dublin 2147681011131296673,20135
Dublin 31025779111310911145,34453
Dublin 401479910141498887,09142
Dublin 5001469111715119974,91141
Dublin 61234667111310910175,67555
Dublin 6W112688913138910102,84747
Dublin 700125881214101012177,16054
Dublin 803687891112888119,01941
Dublin 9103689911141091096,20945
Dublin 10  25141613111176782,31640
Dublin 111281212111111965657,05229
Dublin 1201345791214101012125,59550
Dublin 1331412111111131276543,83929
Dublin 14125889101313107875,75238
Dublin 15225101315151612532112,06817
Dublin 161159111212161475435,05427
Dublin 17 181015211514842213,22324
Dublin 18271215151399932216,24417
Dublin 20 59118781213117541,40229
Dublin 220014813141820106434,01925
Dublin 241125121414161486529,04620
                
Total12479111113138777122,73135
                
Table 6 BER Ratings by Main Space Heating Fuel
% of row
Fuel TypeEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Mains Gas1251115151413105443210,477
Bulk LPG126172118139632118,018
Bottled LPG0138121412121544510732
Heating Oil012611151616126555214,850
Electricity11113581318131091879,275
Coal  00011414151317353,292
Smokeless Fuel   0001315181315353,055
Peat 0  011310111416421,255
Wood Pellets & Chips2714231313105421221,058
Wood Logs2122334913991033535
Solid Multi-Fuel00000127141413163321,618
               
Total113711131314127557544,165
               
Table 7 BER Ratings by Main Water Heating Fuel
% of row
Fuel TypeEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Mains Gas1251115151413105442209,086
Bulk LPG126172118139632117,963
Bottled LPG013812141411155459767
Heating Oil012612151616126555213,237
Electricity11113581317121092083,532
Coal0001112515151518273,174
Smokeless Fuel   0001417201416272,801
Peat   0011411121417401,294
Wood Pellets & Chips3715231313105422211,064
Wood Logs21233351013991128484
Solid Multi-Fuel00000128141514162920,763
               
Total113711131314127557544,165
               
Table 8 Main Space Heating Fuel by County
% of row
CountyFuel TypeTotal
Mains GasHeating OilElectricitySolid FuelLPG
Carlow36479627,770
Dublin 01-247262110118,496
Dublin County7712101037,605
Kildare4639103120,301
Kilkenny30528829,371
Laois304681518,363
Longford261191434,964
Louth553653113,978
Meath424593115,656
Offaly95692417,107
Westmeath16531414310,250
Wexford1691513318,516
Wicklow434296115,182
Clare11611412316,198
Cork City7110172011,892
Cork County4140134251,017
Kerry1661910518,814
Limerick City562020408,758
Limerick County2848149118,793
Tipperary1366812119,238
Waterford City611421405,436
Waterford County255213729,470
Galway City174236327,404
Galway County767167325,475
Leitrim067151264,046
Mayo372149314,857
Roscommon373111036,387
Sligo26223959,430
Cavan96910848,009
Donegal08186415,769
Monaghan8747835,613
       
Total39391562544,165
       
Table 9 Main Space Heating Fuel by Period of Construction
% of row
Period of ConstructionFuel TypeTotal
Mains GasHeating OilElectricitySolid FuelLPG
1700-189930382110113,653
1900-192931391910128,296
1930-19494238910126,777
1950-1966454267141,783
1967-1977375147155,716
1978-1982355248138,843
1983-19933347118263,456
1994-19993238235167,415
2000-200438362042100,183
2005-20094828192499,134
2010-2015582315128,909
       
Total39391562544,165
       
Table 10 Main Space Heating Fuel by Type of Dwelling
% of row
Dwelling TypeFuel TypeTotal
Mains GasHeating OilElectricitySolid FuelLPG
Apartment43450124,036
Ground-floor apartment477431230,759
Mid-floor apartment401581136,864
Top-floor apartment422531231,610
Basement Dwelling309602 122
Maisonette53736235,389
House187045338,982
Detached house1572562139,963
Semi-detached house4740481139,842
End of terrace house592487138,636
Mid-terrace house602297177,962
       
Total39391562544,165
       
Table 11 Average Floor Area by Period of Construction and Type of Dwelling
m2
PeriodApartmentGround-floor apartmentMid-floor apartmentTop-floor apartmentBasement DwellingMaisonetteHouseDetached houseSemi-detached house End of terrace houseMid-terrace houseAll dwelling types
1700-18996954455555105148158142115105117
1900-19296351445342881191241199590100
1930-1949525945505276110120109848197
1950-19667063535557621161251128786103
1967-19776664595475601321391078483109
1978-19826463635410069137142968482109
1983-1993585755574571146150948280108
1994-19996763586759771521611018383110
2000-20047570697770901651771039591114
2005-200981727178959616919110710198110
2010-20158677737586101193212122118111140
             
All7666667056871471561049088109
             
Table 12 Average Primary Energy Use by Period of Construction and Type of Dwelling
kWh/m2/year
PeriodApartmentGround-floor apartmentMid-floor apartmentTop-floor apartmentBasement DwellingMaisonetteHouseDetached houseSemi-detached house End of terrace houseMid-terrace houseAll dwelling types
1700-1899435423394490400468417413394423373406
1900-1929473433416511395449415421394431385412
1930-1949367353290421485450378403344382335367
1950-1966419338308403511303341357314347306332
1967-1977388326282385346328292299286284261289
1978-1982331293247300309307246253260246225251
1983-1993342310258304280284229234250251228242
1994-1999282286243289243262208209234258234227
2000-2004253247210247324220189193216224198207
2005-2009170190162193228164152163175171157168
2010-201516410886112132891029580848091
             
All228254200261362232234245247268258246
             
Table 13 Average Carbon Dioxide Emissions by Period of Construction and Type of Dwelling
kgCO2 /m2/year
PeriodApartmentGround-floor apartmentMid-floor apartmentTop-floor apartmentBasement DwellingMaisonetteHouseDetached houseSemi-detached house End of terrace houseMid-terrace houseAll dwelling types
1700-18991029687112851101071079610187100
1900-19291129993115861081071109510390102
1930-1949858063931071069710481897889
1950-19669975678811264869172797079
1967-1977937359848575747467666170
1978-1982806753667772626362575261
1983-1993827157696265575859595258
1994-1999666555655559515154605354
2000-2004585446547248464751504348
2005-2009374034414934363941373438
2010-2015362217233018242217171620
             
All515644577951586158625959
             
Table 14 Dwellings with Multiple BER Ratings
% of total
Earliest YearLatest YearTotal
A2A3B1B2B3C1C2C3D1D2E1E2FG
A1    0         0
A20    0        0
A3 0000         0
B1 0000000 0    1
B2  001000000 0 1
B3 00111000000  4
C1 00023100000007
C2  0013210000008
C3 000123210000011
D1  00123321000013
D20000122232100014
E1 000111122100010
E2000011111211009
F 000111111111010
G0001111112111214
                
Total00141217161413105332100
                
Table 15 BER Ratings Weighted to National Level
% of row
Dwelling TypeEnergy Rating Total
AB1B2B3C1C2C3D1D2E1E2FG
Apartment126910101011128669163,122
Detached house1127101213131265611675,401
Semi-detached house11149131516138666434,139
Terraced house1126101212121287811262,277
               
Total1126101213141276691,534,939
               
Table 16 BER Ratings by Eircode Routing Key (only includes dwellings pre-assigned an Eircode)
       
Eircode Routing KeyEnergy Rating (%)Number of BER Dwellings with an EircodeAverage Age (years)Number of 2011 Census Dwellings with an Eircode
A-BC-DE-G
A41623253712394
A42405468217857
A45603466814496
A631760222,7872410,871
A671059311,9072710,468
A75136818720226,596
A81166816602265,848
A821472152,0561720,778
A8326685487105,377
A842663111,051134,944
A8512835902136,185
A86127810565173,252
A911369175,0823127,223
A921471156,5672435,428
A941354335,4294120,227
A961453336,4104221,303
A98960313,2043616,074
C151273154,5162028,199
D011059313,3673414,466
D021157322,056388,141
D03543514,1076217,070
D041057335,7594420,216
D05656384,3484319,507
D061143464,1845819,993
D6W1054372,8104710,947
D07448496,2185625,715
D081346426,3204827,504
D09951405,1044822,427
D10665292,171427,780
D111858245,7823123,778
D12846475,2935122,588
D132058214,9402820,848
D141254334,7524016,829
D1517731011,0381838,389
D161764195,0362619,727
D17682132,266317,008
D182762116,3891920,900
D2045837855374,619
D221366214,0242417,219
D241368188,8102036,055
E2186725487324,688
E2586824594275,023
E3247125792336,027
E3426235961398,661
E41460362,0433016,385
E45966251,8182611,226
E5385735836275,274
E91768252,3573314,982
F121174161,0471515,396
F23582131,6791911,044
F26769242,2152222,339
F281362261,0642113,030
F31125830281183,312
F3517821289143,946
F4287121756169,384
F45378187011412,237
F52186714507156,207
F56167113425124,568
F911062275,1232328,841
F92977143,2171830,129
F931176132,4561830,647
F941368201,2991923,662
H121269191,6721713,192
H1487517401154,755
H16166915193212,905
H181066241,1792711,404
H2336136261521,716
H53566291,2342214,545
H54773211,2871712,034
H6268014851166,592
H6513798755135,358
H7125939283152,755
H916742013,1032170,566
K32187392,6371610,948
K341170191,015304,416
K362265132,6872110,451
K456886507163,061
K5615769670193,549
K671078123,7271916,905
K78217094,3951616,551
N371064263,0832618,150
N391266222,8681620,212
N41873191,2921514,207
N911266213,6252024,277
P12236413507237,473
P1422512741371,101
P17155827791285,479
P241661231,182295,962
P252070102,4731812,628
P312268102,231188,427
P327712114301,423
P361160291,093217,634
P431772112,115199,047
P47264430266275,214
P512362153,1592130,289
P56157213449195,309
P61177013951246,726
P67127215439263,742
P72186616829267,369
P75116128524278,877
P81116029669289,606
P85106327555306,171
R14975161,681239,356
R2176924303253,408
R321763214,7872029,744
R35660332,0372615,418
R4255243962269,331
R4555737639263,844
R5147422931226,329
R5697319584254,169
R931171184,1972221,978
R951268214,8882829,921
T1215622313,4283652,685
T231164248,1134331,254
T345347 127111,185
T45266952,152157,795
T5633642281102,242
V14773201,423304,233
V1545739720278,128
V23186319253265,436
V3186428859239,458
V351149408362210,791
V4267420897186,194
V92867254,3182632,027
V931170192,9072026,572
V946741916,5563076,638
V95772215,6992132,935
W121173161,992209,351
W231569154,4172122,700
W34246313395162,624
W911372154,8321832,682
X35970201,215297,449
X4246729192182,943
X91872208,6693239,701
Y14571242,1392810,890
Y21667282,6132320,775
Y25772212,1731615,096
Y34273251,6232510,000
Y35668263,9582624,352
       

Background Notes

Domestic Building Energy Ratings

 

Introduction 

A Building Energy Rating (BER) is an indication of the energy performance of a dwelling (represented in units of kWh/m2/annum). Actual energy performance will depend on how the occupants operate the dwelling. A BER is based on the characteristics of major components of the dwelling including: wall, roof and floor dimensions; window and door sizes and orientations, as well as the construction type and insulation, ventilation and air tightness features; the system for heat supply (including renewable energy), distribution, and control; and the type of lighting. 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 energy use is calculated on the basis of a notional family with a standard pattern of occupancy - hence data in this release giving average primary energy use or carbon dioxide emissions are not based on actual data. A BER only covers electricity used for heating, lighting and ventilation with associated pumps and fans. Electricity used for cooking, refrigeration, laundry and other appliance use are not included.

Since 1st January 2009, a BER certificate and advisory report is compulsory for all homes being sold or offered for rent. A BER is also required for new dwellings that apply for planning permission on or after 1st January 2007. A BER certificate is required to avail of the grants for energy-efficiency improvements to the home that are provided under the Better Energy Homes scheme.

Access to Microdata 

Further information on the BER scheme (including links to a microdata research tool) is available on the Sustainable Energy Authority of Ireland website at http://www.seai.ie/BER/ 

Revisions 

The figures will be updated on a quarterly basis. While the changes to previous quarters will mainly relate to the most recent quarter, previous periods are also subject to revision mainly arising from some dwellings having another BER audit undertaken.

Coverage 

There are three types of BER Certificates. A New Dwelling – Provisional BER is required for a dwelling that is not yet built but is offered for sale off the plans. A New Dwelling – Final BER is required for a newly-built dwelling before it is occupied. This certificate is based on data collected in a site survey carried out by a registered BER Assessor as well as drawings and specifications for the completed dwelling. An Existing Dwelling BER is required for any existing dwelling that is offered for sale or to let. An existing dwelling is one that has previously been sold or occupied. This is based on data collected in a site survey carried out by a registered BER Assessor. Both the New Dwelling – Final BER and the Existing Dwelling BER certificates are valid for 10 years from the date of issue. They become invalid if material changes are made to the dwelling during that period. This release is an analysis of Final and Existing BER certificates. To ensure that all tables are consistent with each other, records that contain missing data in any of the main classification variables used in this release have been excluded e.g. missing response for county. Records with only the main space heating fuel or main water heating fuel information missing have been included except in tables using those variables. 

National representativeness  

BERs are conducted for around 85,000 domestic dwellings each year. Hence there were 551,000 unique domestic BERs (one per dwelling) completed in the period 2009 to the end of June 2015. This compares with around 1.66 million occupied private households enumerated in the 2011 Census of Population. The 2011 Census of Population included questions on county of location of the dwelling, the period when the dwelling was built, and the type of dwelling. These questions can be used to weight the BER data to national level. Table 15 presents an initial weighting of BERs up to national level using the 2011 Census of Population. The weights were calculated by dividing the number of households in the Census by the number of unique BER households. In cases where a household had more than one BER carried out in the period 2009-2015 only the most recent BER was used. Around 7% of Census households were excluded because there were no BER households in the particular stratum e.g. detached houses in Dublin 1 that were constructed in the period 1919-1945. A stratum was classified as a unique combination of County (52 categories - Dublin postal districts were distinguished), period of construction (nine categories) and dwelling type (four categories). The BER contains more disaggregated dwelling types, e.g. mid-terrace house, but these had to be aggregated to correspond to the Census classification. 

In mid-2015 the Census and BER files were allocated Eircodes. This makes it possible to match both files at household level as postcodes are unique at letter-box level. This will create an opportunity to calculate weights in a more precise manner. For this release we have added a new Table 16 (see below for more details). 

Non-domestic Buildings  

Since 1st July 2008, a BER Certificate is required for all new non-residential buildings and from 1st January 2009 for all public service buildings and for existing non-residential buildings. The CSO is in the process of obtaining access to the non-residential file.

Definitions  

The BER rating scale is divided into categories from G (largest primary energy usage) to an A1 rating (lowest primary energy usage). The kilowatt-hour is the unit of energy used in Dwelling Energy Assessment Procedure (DEAP). The BER is measured in kWh per square metre of floor area of the dwelling per year (kWh/m2/year). The full range of categories is described in Table A. For the purposes of this release A1, A2, and A3 have been combined together because of the small number of Certificates in these categories. 

Table A: Building Energy Rating Categories 

Category

kWh/m2/year

A1

≤ 25

A2

> 25

A3

> 50

B1

> 75

B2

> 100

B3

> 125

C1

> 150

C2

> 175

C3

> 200

D1

> 225

D2

> 260

E1

> 300

E2

> 340

F

> 380

G

> 450

 

County is where the dwelling is located. 

Type of dwelling is selected from one of the following: Detached house; Semi-detached house; End of Terrace house; Mid-terrace house; Ground-floor apartment; Mid-floor apartment; Top-floor apartment; Basement apartment; and Maisonette. 

Year of construction is when the dwelling was originally built. 

The fuel used by the Main Space Heating system. The main space heating system heats the largest proportion of the dwelling. This proportion is calculated using a count of the habitable rooms. It often provides hot water as well as space heating. 

The fuel used by the Main Water Heating system. This category has similar fuel response options to the Main Space Heating system. 

The Total Internal Floor Area of the dwelling is the total area of exposed and semi-exposed floors. It excludes any unheated areas that are thermally separated from the dwelling. The total energy usage is divided by the dwelling floor area to determine the Building Energy Rating. 

Table Notes  

Table 1 presents the number of Final and Existing BERs published by month since January 2009. A household 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 and will inform the user of changes since the previous quarterly analysis. 

Tables 2-13 only include the latest BER published for each dwelling from January 2009 to June 2015; hence the total number of BER certificates is lower than the total in Table 1.

Table 2 shows the general impact of the age of the dwelling on the BER profile. It can be linked with changes to the Building Regulations that require new homes to be more energy efficient. 

Table 3 shows how the BER profile varies by type of dwelling. 

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

Tables 6-7 profile BERs by main space and water heating fuels respectively. Records with a missing response for main space heating fuel have been excluded from Table 6 and 8. Similarly records with a missing response for main water heating fuel have been excluded from Table 7. 

Table 8 cross-classifies county by main space heating fuel. Mains gas is not generally available in some counties. Some counties use local heating fuels such as peat e.g. County Offaly. 

Tables 9-10 cross-classify main space heating fuel by period of construction and dwelling type. 

Tables 11-13 cross-classify the BER by period of construction and the dwelling type. The latter is more precisely defined in recent years but in the earlier years more general descriptions such as House were in use. It is not possible to reclassify these to detached, semi-detached, end-of-terrace, or mid-terraced house. The average primary energy use and average carbon dioxide figures are notional figures based on assumed energy use factors and occupancy. 

Table 14 is an analysis of properties that had BER audits carried out in more than one year. The earliest and latest BER ratings are cross-classified to show trends in energy savings arising from insulation retrofitting etc.

Table 15 is an analysis of BER properties after they have been weighted to Census 2011 level. It can be compared with the Total row profile in Table 2. See the entry under National representativeness for more details.

Table 16 is a new experimental table profiling the 139 Eircode routing keys by BER rating. The table gives the percentage of A-B, C-D, and E-G energy ratings for each routing key. The number of BER dwellings with a pre-assigned Eircode and the average age of those dwellings are also given. The table only includes dwellings that have both a BER rating and a pre-assigned Eircode. The proportion of dwellings that have had a BER audit can vary across routing keys and this should be taken into account in interpreting the table. As part of the preparations for the launch of Eircode, around 95% of dwellings in the 2011 Census of Population file were pre-assigned an Eircode. The number of such dwellings in each routing key area is given in Table 16. This allows users to roughly determine the proportion of dwellings in a routing key that have a BER rating and a pre-assigned Eircode. In areas where this proportion is low, additional care should be taken in interpreting the BER ratings profile as it may not be fully representative of the routing key.

The following table contains a provisional listing of routing keys by county. The list is indicative only as it is not based on an analysis of the full Eircode database. Dwellings were assigned to an Eircode routing key based on their An Post principal postal town span of delivery rather than on the actual geographical location of the dwelling.

 

County

Main Eircode Routing Keys

Carlow

R21, R93, R95

Cavan

A81, A82, F91, H12, H14, H16

Clare

V14, V15, V94, V95

Cork City

T12, T23

Cork County

P12, P14, P17, P24, P25, P31, P32, P36, P43, P47, P51, P56, P61, P67, P72, P75, P81, P85, T12, T23, T34, T45, T56

Donegal

F91, F92, F93, F94

Dublin City

D01-D24 including D6W

Dublin County

A41, A42, A45, A94, A96, K32, K34, K36, K45, K56, K67, K78

Galway City

H91

Galway County

F42, F45, H53, H54, H62, H65, H71, H91

Kerry

P51, V23, V31, V92, V93

Kildare

A83, R14, R51, R56, W12, W23, W34, W91

Kilkenny

E32, E41, R95, X91

Laois

R14, R32, R93

Leitrim

F91, H12, N41

Limerick City

V94

Limerick County

P56, V35, V42, V94

Longford

N39

Louth

A91, A92

Mayo

F12, F23, F26, F28, F31, F35

Meath

A82, A83, A84, A85, A86, A92, C15, K32

Monaghan

A75, A81, H18, H23

Offaly

R32, R35, R42, R45

Roscommon

F42, F45, F52, N37, N39, N41

Sligo

F26, F52, F56, F91

Tipperary

E21, E25, E32, E34, E41, E45, E53, E91, V94

Waterford City

X91

Waterford County

P36, P51, X35, X42, X91

Westmeath

N37, N91

Wexford

Y21, Y25, Y34, Y35

Wicklow

A63, A67, A98, W91, Y14

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