Wales
MEES 2031 exposure in Carmarthenshire
50 of the 78 industrial and warehouse buildings over 1,000 m² in Carmarthenshire with an EPC are rated C to E: 1.7m sq ft (158,347 m²) of floorspace that meets today's E minimum but falls short of the proposed EPC B standard.
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Carmarthenshire in figures
EPC register, snapshot 30 Sep 2026
- Rated C to E
- 1.7m sq ft158,347 m² in 50 buildings
- Rated F or G
- 3 buildings62k sq ft (5,726 m²), below today's E minimum
- Rated A+ to B
- 25 buildingsAlready at the proposed standard
- Share below B
- 68%Of 78 buildings over 1,000 m². England and Wales: 70%
Carmarthenshire has the 186th most floorspace rated C to E of 316 local authorities in England and Wales, and the 15th most of 22 in Wales.
EPC rating mix
Share of buildings over 1,000 m², by latest EPC rating
- Carmarthenshire78 buildings32%64%
- Wales1,738 buildings22%75%
- England and Wales38,148 buildings30%67%
Latest certificate per building from the government's EPC register, snapshot 30 Sep 2026. Industrial and warehouse uses (B2 and B8), floor area over 1,000 m² as declared on the EPC; 1 m² is 10.7639 sq ft. How we count it
What stands out in Carmarthenshire
Compared with the other 21 local authorities in Wales and with England and Wales, from the same EPC register snapshot.
- Most of its floorspace rated C to E, 59% or 997k sq ft (92,636 m²), is in 43 buildings of 1,000 to 5,000 m².
- 40 of its 53 buildings rated C to G (75%) have an EPC that has lapsed or is estimated to lapse before 2031, against 54% across England and Wales; 18 have already lapsed.
- 8 of its 22 C-rated buildings (36%) have an asset rating of 51 to 60, within 10 points of band B: 211k sq ft (19,593 m²) of floorspace. Across England and Wales it's 37%.
- 35% of its buildings are heated mainly by oil, LPG or biomass, against 6% across England and Wales.
- In the 12 months to 30 Sep 2026, 10 industrial and warehouse buildings of any size here had an EPC lodged to be let and 7 for a marketed sale, 17 in all: the 11th most of 22 local authorities in Wales.
- The recommendation lodged most often on its certificates rated C to G is “Consider installing building mounted wind turbine(s)” (EPC-R2), on 43 of 53 buildings.
Every rating, A+ to G
Carmarthenshire's 78 industrial and warehouse buildings over 1,000 m² by latest EPC rating, beside Wales and the whole of England and Wales.
By latest EPC rating
Share is of buildings over 1,000 m² in each area.
| Rating | Buildings | Floor area | Share | Wales | England and Wales |
|---|---|---|---|---|---|
| A+ | 1 | 113k sq ft10,520 m² | 1% | 1% | 2% |
| A | 3 | 40k sq ft3,691 m² | 4% | 5% | 10% |
| B | 21 | 566k sq ft52,627 m² | 27% | 17% | 19% |
| C | 22 | 605k sq ft56,227 m² | 28% | 40% | 36% |
| D | 21 | 679k sq ft63,052 m² | 27% | 26% | 22% |
| E | 7 | 421k sq ft39,068 m² | 9% | 9% | 9% |
| F | 1 | 14k sq ft1,324 m² | 1% | 1% | 1% |
| G | 2 | 47k sq ft4,402 m² | 3% | 2% | 2% |
Within 10 points of B
Rated C with an asset rating of 51 to 60. Band B ends at 50.
8 buildings
Of 22 rated C (36%), with 211k sq ft (19,593 m²) of floorspace. England and Wales: 37% of C-rated buildings.
By building size
Floor area as declared on the EPC.
| Floor area | Buildings | Rated B or better | C to E floor area |
|---|---|---|---|
| Over 1,000 to 5,000 m² | 68 | 32%22 of 68 | 997k sq ft92,636 m² |
| Over 5,000 to 10,000 m² | 8 | 25%2 of 8 | 490k sq ft45,546 m² |
| Over 10,000 m² | 2 | 50%1 of 2 | 217k sq ft20,165 m² |
Certificates and lettings
An EPC lasts 10 years, and a valid one is needed to let or sell. We estimate expiry as the lodgement date plus 10 years.
When the certificates lapse
Buildings over 1,000 m², by when their latest EPC lapses, at 30 Sep 2026.
| EPC lapses | All buildings | Rated C to G | C to G floor area |
|---|---|---|---|
| Already lapsed | 20 | 18 | 573k sq ft53,219 m² |
| Rest of 2026 | 0 | 0 | 0 sq ft0 m² |
| In 2027 | 2 | 2 | 31k sq ft2,851 m² |
| In 2028 | 4 | 4 | 56k sq ft5,227 m² |
| In 2029 | 15 | 15 | 743k sq ft69,035 m² |
| In 2030 | 4 | 1 | 11k sq ft1,057 m² |
| 2031 or later | 33 | 13 | 352k sq ft32,684 m² |
New EPCs in the last year
Industrial and warehouse buildings of any size whose latest EPC was lodged in the 12 months to 30 Sep 2026, by the reason on the certificate.
- To let
- 10buildings
- Marketed sale
- 7buildings
- New build
- 1building
- Other reasons
- 7buildings
25 in all: 40% to let, against 56% across England and Wales. How the daily feed works
Uses, heating and recommendations
What the buildings are used for, how they're heated, and what assessors recommended on the certificates of those rated C to G.
By use
Use from the EPC's property type.
| Use | Buildings | B or better | C to E | F or G | C to E floor area |
|---|---|---|---|---|---|
| Storage and distribution (B8) | 42 | 15 | 27 | 0 | 759k sq ft70,521 m² |
| General industrial (B2) | 36 | 10 | 23 | 3 | 945k sq ft87,826 m² |
By main heating fuel
As recorded on each building's latest EPC.
| Main heating fuel | Buildings | Share | England and Wales |
|---|---|---|---|
| Grid supplied electricity | 25 | 32% | 37% |
| Natural gas | 25 | 32% | 53% |
| Oil | 14 | 18% | 4% |
| Biomass | 8 | 10% | 1% |
| LPG | 5 | 6% | 1% |
| Other | 1 | 1% | 4% |
What assessors recommend
The five most common on the latest certificates of its 53 buildings rated C to G, in the register's wording. A recommendation is the assessor's, not a requirement.
- 01
Consider installing building mounted wind turbine(s).
EPC-R2. On 43 of 53 buildings (81%)
- 02
Consider replacing T8 lamps with retrofit T5 conversion kit.
EPC-L5. On 40 of 53 buildings (75%)
- 03
Consider installing solar water heating.
EPC-R3. On 40 of 53 buildings (75%)
- 04
Add optimum start/stop to the heating system.
EPC-H7. On 39 of 53 buildings (74%)
- 05
Carry out a pressure test, identify and treat identified air leakage. Enter result in EPC calculation.
EPC-E7. On 36 of 53 buildings (68%)
How Carmarthenshire compares
Carmarthenshire has 0.2% of the industrial floorspace rated C to E in England and Wales. 68% of its buildings over 1,000 m² are below B, against 78% across Wales and 70% nationally.
Against the region and the country
| Area | Over 1,000 m² | Rated C to E | C to E floor area | Rated F or G | Share below B |
|---|---|---|---|---|---|
| Carmarthenshire | 78 | 50 | 1.7m sq ft158,347 m² | 3 | 68% |
| Wales | 1,738 | 1,295 | 55.9m sq ft5,191,184 m² | 54 | 78% |
| England and Wales | 38,148 | 25,619 | 1.01bn sq ft94,020,657 m² | 1,037 | 70% |
Nearby in the Wales ranking
| Rank | Local authority | C to E floor area |
|---|---|---|
| 13 | Merthyr Tydfil | 1.9m sq ft173,053 m² |
| 14 | Monmouthshire | 1.8m sq ft162,983 m² |
| 15 | Carmarthenshire | 1.7m sq ft158,347 m² |
| 16 | Vale of Glamorgan | 1.5m sq ft139,280 m² |
| 17 | Denbighshire | 915k sq ft85,039 m² |
What the 2031 proposal means
In June 2026 the government said it intends that privately rented non-domestic buildings over 1,000 m² reach EPC B from 2031, where cost effective. It needs secondary legislation, so for now it's a proposal, not law. What the proposal means
C to E: fine today, short of B
Carmarthenshire has 50 buildings over 1,000 m² rated C to E. They meet today's E minimum, but would fall short of B if the proposal becomes law while they're let.F or G: below the minimum already
3 buildings in Carmarthenshire are rated F or G. If let, they already need an improvement or a registered exemption under today's rules.Where cost effective, and only when let
The 7-year payback test and the exemptions remain. Owner-occupied buildings are counted too, as an EPC can't say whether a building is let. Local weights and measures authorities enforce the rules. MEES in plain EnglishRatings change at renewal
40 of Carmarthenshire's buildings rated C to G have an EPC that has lapsed or is estimated to lapse before 2031. Each needs a new certificate before it's let or sold, and the new rating may differ.
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