Local authority
EPC ratings in Carmarthenshire
Explore EPC ratings for properties in Carmarthenshire. 60,118 properties have been assessed, with an average rating of D. Browse districts below to see local energy efficiency trends, or search for a specific address to view detailed EPC data. The most common improvement recommended across Carmarthenshire is solar photovoltaic panels, 2.5 kwp, followed by solar water heating.
On average, 35% of EPC-rated homes in Carmarthenshire are band A-C and 65% are band D-G, broadly below the England & Wales average.
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Percentage of properties in each EPC band across Carmarthenshire.
District breakdown
14 districts in this authority.
SA14
Properties: 10,411
Band A-C
39%
Band D-G
61%
SA15
Properties: 12,498
Band A-C
37%
Band D-G
63%
SA16
Properties: 2,786
Band A-C
39%
Band D-G
61%
SA17
Properties: 3,344
Band A-C
43%
Band D-G
57%
SA18
Properties: 8,265
Band A-C
36%
Band D-G
64%
SA19
Properties: 2,943
Band A-C
22%
Band D-G
78%
SA20
Properties: 1,009
Band A-C
20%
Band D-G
80%
SA31
Properties: 6,416
Band A-C
47%
Band D-G
53%
SA32
Properties: 2,140
Band A-C
19%
Band D-G
81%
SA33
Properties: 4,018
Band A-C
25%
Band D-G
75%
SA34
Properties: 1,353
Band A-C
35%
Band D-G
65%
SA38
Properties: 792
Band A-C
21%
Band D-G
79%
SA39
Properties: 738
Band A-C
16%
Band D-G
84%
SA40
Properties: 572
Band A-C
17%
Band D-G
83%
Common improvements in Carmarthenshire
Top recommended actions across districts in this authority.
- 1
Solar photovoltaic panels, 2.5 kWp
68370 occurrences
- 2
Solar water heating
62436 occurrences
- 3
Low energy lighting for all fixed outlets
40727 occurrences
- 4
Floor insulation (solid floor)
34165 occurrences
- 5
Internal or external wall insulation
18568 occurrences
Check a property in this area
Enter your postcode to view a specific EPC report within Carmarthenshire.
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For journalists, researchers and local groups
Use these statistics
Free to reuse with a link to this page. Figures cover homes with an EPC on the official register, counted by their latest certificate. Homes that have never had an EPC are not included, so the figures describe certified homes, not every home in Carmarthenshire.
Summary
In Carmarthenshire, 35.0% of homes with an EPC are rated band C or above, based on the latest certificate for 60,118 homes on the official register (statistics updated June 2026). That is 12.7 percentage points below the England and Wales figure of 47.7%.
Citation
EPC Advisor (2026). EPC ratings in Carmarthenshire. Statistics updated June 2026. Analysis of the MHCLG Get Energy Performance Data register (Open Government Licence v3.0). https://epcadvisor.co.uk/browse/carmarthenshire
- Band C or above:
- a current rating of A, B or C.
- Homes counted:
- 60,118
- Statistics updated:
- June 2026
- Source:
- The MHCLG Get Energy Performance Data register, published under the Open Government Licence v3.0. How we calculate these figures · All EPC data downloads