BER ratings · Castlebar, Co. Mayo
BER ratings in Castlebar: typical C2, 12% rated E to G
4,152 current BER certificates on the SEAI register are for addresses in Castlebar. The middle rating is C2; 12% are E, F or G and 35% are A or B.
C2
middle BER of 4,152 current certificates for Castlebar addresses
12%
rated E, F or G (Ireland: 12%)
35%
rated A or B (Ireland: 51%)
A 19% · B 15% · C 36% · D 17% · E 6% · F 2% · G 4%
Energy ratings in Castlebar: what the SEAI register shows
We hold a copy of the public SEAI register. For addresses in Castlebar it has 4,152 current certificates, 2,113 of them issued since 2023. The middle rating is C2. Close to the national split.
A certificate exists only where a house was sold, let or built since 2009, so the register leans towards houses that have changed hands. Average energy use across certified homes in Castlebar is about 201 kWh/m² a year.
Reading a BER as a buyer
The letter is the headline; the advisory report is the useful part. It lists what the assessor saw (walls, roof, windows, boiler) and what each upgrade would do to the rating. From 2026 the scale itself tightened, so a certificate issued before then can read one band better than the same house would today. Ask for the certificate number and check its date and validity on the SEAI register.
For a mortgage, a BER of B2 or better qualifies for green rates worth several thousand euro over the term. For an E, F or G house, price in the retrofit: SEAI grants cover part, and a One Stop Shop deep retrofit runs from €25,000 upwards after grants on a typical semi.
Check one house in Castlebar
The area tells you the odds. The report tells you about the house.
Enter the Eircode. The free snapshot shows which of the twenty-nine checks flag up. The full report (€24.99, one house, no account) fetches the exact certificate and the assessor's advisory report from the SEAI register for the Eircode, translates the rating to the 2026 scale, and flags the age-related risks (lead, asbestos, wiring) that go with the build year.
Or read the sample report first: a real house, 16 pages.
Also for Castlebar
Questions people ask
- What is the typical BER in Castlebar?
- Of 4,152 current certificates on the SEAI register for addresses in Castlebar, the middle rating is C2. 35% are A or B, 12% are E, F or G. Nationally the split is 51% A/B and 12% E/F/G.
- How much does a poor BER cost to run?
- The register's average energy use for Castlebar is about 201 kWh per square metre a year. A G-rated house uses over 450; an A2 under 50. On a 100 m² house at today's prices that gap is several thousand euro a year in heating, before any SEAI grant.
- Can I get the BER for a house before buying?
- Every advertised house must show its BER and the seller must give you the certificate and advisory report. The report on this site pulls the certificate straight from the SEAI register for the Eircode, with the assessor's advisory report attached, so you can see what the upgrade path is before you view.
Sources
Area figures, compiled from public records. They describe the town or county, not any one house. The paid report checks the exact Eircode.