What is the average EPC rating in Carmarthenshire?

The analysed certificates in Carmarthenshire have an average EPC rating of D, with an average efficiency score of 63 out of 100.

How many properties does the Carmarthenshire analysis represent?

The 2020–2025 analysis contains 31,059 certificates linked to 29,413 distinct property references. A property may have more than one certificate.

Can EPCScore show the certificate for a specific home in Carmarthenshire?

No. EPCScore publishes aggregated area statistics. Use the official GOV.UK Energy Performance of Buildings Register to find an individual certificate.

Local authority energy-performance profile

Carmarthenshire EPC ratings and energy costs

Understand how homes in Carmarthenshire score, what certificate-estimated energy costs look like and how much improvement the recorded recommendations suggest.

Compare with another area →

Average EPC

D 63

5.5 points below analysed national average

Rated C or above

40.8%

of analysed certificates

Potential uplift

+20

average score points

Properties represented

29K

from 31K certificates

At a glance

What the data says about Carmarthenshire

40.8%

rated A–C

22.1%

rated E–G

£1,344

certificate-estimated annual cost

Cost figures are averages of estimates recorded on EPCs at different dates. They are useful for comparing areas, but they are not a forecast of a current household bill.

Latest official local-authority table

Updated through 30 June 2026

89,353

domestic EPC lodgements since 2008

31.7%

rated C or above

34.0%

rated E, F or G

The current MHCLG live table counts certificate lodgements, not unique homes. It complements the more detailed 2020–2025 EPCScore analysis below.

Housing market context — May 2026

Average property price

£195,515

Annual change

+4.7%

Context

Official UK HPI local-authority average

detached£279,925

semi-detached£179,851

terraced£146,869

flat£92,167

UK HPI figures are provisional and can be revised. They describe the whole local housing market; EPCScore does not infer that EPC ratings caused local price levels or changes. View the official UK HPI ↗

Average EPC score in Carmarthenshire

A92+

2.7%

B81–91

7.7%

C69–80

30.4%

D55–68

37.0%

E39–54

15.5%

F21–38

4.8%

G1–20

1.8%

EPC band distribution in Carmarthenshire

8372.7%

2,3997.7%

30.4%

9,448

37.0%

11,502

15.5%

4,799

1,5034.8%

5711.8%

Certificate-estimated energy costs

Cost Type	Carmarthenshire	National Avg	Difference
Heating	£1,021/yr	£782/yr	▲ £239
Hot water	£216/yr	£184/yr	▲ £32
Lighting	£107/yr	£95/yr	▲ £12
Total	£1,344/yr	£1,061/yr	▲ £283

These values come from certificate assessments and reflect standardised occupancy assumptions and energy prices used when each EPC was produced. They are not live tariffs.

Property types in the dataset

House

21,83370.3%

Bungalow

5,25816.9%

Flat

3,76612.1%

Maisonette

1660.5%

Park home

360.1%

Main heating fuel

Mains gas

18,48459.8%

Oil

6,97122.6%

Electric

3,73212.1%

LPG

9963.2%

Other

7232.3%

Carbon emissions and improvement potential

4.4 t

current annual CO₂ estimate

2 t

potential annual estimate

99 m²

average floor area

When the represented homes were built

Pre-1900

18%

1900–1929

16%

1930–1949

1950–1966

14%

1967–1975

12%

1976–1982

1983–1990

1991–1995

1996–2002

2003–2006

2007–2011

2012+

Average EPC score over time

2020: 60
2021: 61
2022: 62
2023: 63
2024: 65
2025: 67

What to do next

Find one property's EPC ↗

Use the official register for an address-level certificate.

Plan sensible improvements →

Read recommendations in the right order before spending.

Compare another area →

Put two postcode districts side by side.

Check the methodology →

Understand coverage, dates and limitations.