Llanelli: plumbing, heating and air-conditioning companies
Llanelli has 37 plumbing, heating and air-conditioning companies (SIC 43220) and 60 electrical and other installation companies registered here (Companies House, 1 Sep 2026); 0 are MCS-certified for air-to-air yet. If the office is in SA14, summer 2026 had ≈6 nights above 18 °C there (9 times the 1991–2020 average of 0.7).
SIC 43220
Open a company
ALPHA ENERGY GROUP LTD, incorporated 2020, status Active.
Plumbing, heating and air-conditioning companies
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| MARK HOWARD LIMITED | 43290 · other construction installation | 2003 | Active | SA14 |
| JP BATHROOM SERVICES LTD | 43290 · other construction installation; 68100 | 2026 | Active | SA14 |
| P.A.I. GROUP LIMITED | 43210 · electrical installation | 1999 | Active | SA14 |
| VAUGHAN SOUND INSTALLATIONS LIMITED | 43210 · electrical installation | 1987 | Active | SA14 |
| BECKER (SLIDING PARTITIONS) LIMITED | 43290 · other construction installation | 1986 | Active | SA14 |
| POWER ON DEMAND LTD | 43210 · electrical installation | 2012 | Active | SA14 |
| ECOTHERM INSTALLATIONS LTD | 43290 · other construction installation | 2025 | Active | SA14 |
| SOPHSVOLT ENERGY LIMITED | 43210 · electrical installation; 27200; 46520; 46690 | 2025 | Active | SA15 |
| GWYN TOWNS INSTALLATIONS LTD | 43290 · other construction installation | 2026 | Active | SA15 |
| GOWER TARMAC LTD | 43290 · other construction installation | 2025 | Active | SA14 |
| ELEXOR ENGINEERING LTD | 43210 · electrical installation | 2022 | Active | SA14 |
| COPA INSTALLATIONS LTD | 43210 · electrical installation; 62090 | 2022 | Active | SA14 |
| PROMETHEUS ELECTRICAL LTD | 43210 · electrical installation | 2017 | Active | SA14 |
| NEW DOCK ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2026 | Active | SA15 |
| REVOLT ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2024 | Active | SA14 |
| GREENWAYS ELECTRICAL LTD | 43210 · electrical installation | 2014 | Active | SA14 |
| GREENWAYS ELECTRICAL TESTING LIMITED | 43210 · electrical installation; 33140 | 2018 | Active | SA14 |
| FROSTY ELECTRICAL LTD | 43210 · electrical installation | 2020 | Active | SA15 |
| BESPOKE ELECTRICAL HOME SERVICES LIMITED | 43210 · electrical installation | 2020 | Active | SA15 |
| EJS ELECTRICAL & RENEWABLES LTD | 43210 · electrical installation | 2025 | Active | SA15 |
| JENX PLANT LIMITED | 43290 · other construction installation; 01610; 43120; 81300 | 2014 | Active | SA14 |
| METRO ELECTRICAL (WALES) LTD | 43210 · electrical installation | 2014 | Active | SA15 |
| YMLAEN LIMITED | 43290 · other construction installation | 2014 | Active | SA15 |
| DOWN TO EARTH (WALES) LTD | 43210 · electrical installation | 2014 | Active | SA15 |
| SUNNIEOD ENGINEERING LIMITED | 43290 · other construction installation | 2025 | Active | SA15 |
| MENTRUS TRUSS & JOIST LTD | 43290 · other construction installation | 2019 | Active | SA14 |
| TLPORTER ELECTRICAL CONTRACTOR LTD | 43210 · electrical installation | 2018 | Active | SA15 |
| CLAY CONSTRUCTION LIMITED | 43290 · other construction installation | 2022 | Active | SA15 |
| G&L WATER SERVICES LTD | 43290 · other construction installation; 42210; 43120; 43999 | 2026 | Active | SA15 |
| CCW ELECTRICAL LIMITED | 43210 · electrical installation; 33130; 33140 | 2015 | Active | SA15 |
| DME ENGINEERS LTD | 43210 · electrical installation | 1998 | Active | SA15 |
| TOWY ELECTRICAL COMPANY LIMITED | 43210 · electrical installation | 1980 | Active | SA14 |
| ALLSPARK ELECTRICAL SERVICES LIMITED | 43210 · electrical installation | 2011 | Active | SA14 |
| PAROUSIA ELECTRICAL CONTRACTOR LTD | 43210 · electrical installation | 2023 | Active | SA14 |
| MRG PLANT HIRE LIMITED | 43290 · other construction installation; 43330; 43999; 77320 | 2017 | Active | SA15 |
| WELSPEED ENGINEERING LIMITED | 43210 · electrical installation; 45200 | 2018 | Active | SA15 |
| SYKES ENERGY SERVICES LIMITED | 43210 · electrical installation | 2016 | Active | SA14 |
| WIRING BY WILLIAMS LTD | 43210 · electrical installation | 2024 | Active | SA14 |
| MODULAR INTEGRATED SYSTEMS LTD | 43290 · other construction installation | 2019 | Active | SA14 |
| EMPIRE CARPENTRY INTERIORS LTD | 43290 · other construction installation; 41100; 43320; 43390 | 2016 | Active | SA14 |
| DGW ELECTRICAL CONTRACTORS LIMITED | 43210 · electrical installation | 2010 | Active | SA14 |
| FFLÊR LIMITED | 43290 · other construction installation; 47190 | 2017 | Active | SA14 |
| ARHOMESERVICES LTD | 43290 · other construction installation; 43342 | 2023 | Active | SA14 |
| CELSIUS INSTALLATIONS & SERVICES LIMITED | 43210 · electrical installation | 2014 | Active | SA14 |
| N. WATERS & SONS LTD | 43210 · electrical installation | 2005 | Active | SA14 |
| A-Z ELECTRICAL INSTALL LIMITED | 43210 · electrical installation | 2015 | Active | SA14 |
| PHILLIP REES WELDING LIMITED | 43290 · other construction installation; 33170 | 2005 | Active | SA14 |
| WILLIAMS ELECTRICAL CONTRACTORS (CYMRU) LTD | 43210 · electrical installation | 2015 | Active | SA14 |
| WILLIAMS SOLAR LTD | 43210 · electrical installation | 2023 | Active | SA14 |
| SKYLINE PB LTD | 43290 · other construction installation; 43910 | 2018 | Active | SA14 |
| WEST WALES FIRE SPRINKLERS LTD | 43290 · other construction installation | 2025 | Active | SA14 |
| IWEC INTERNATIONAL LIMITED | 43210 · electrical installation | 2000 | Active | SA17 |
| CELTIC GATES LTD | 43210 · electrical installation | 2025 | Active | SA14 |
| JRM RAIL LTD | 43290 · other construction installation | 2015 | Active - Proposal to Strike off | SA15 |
| ROY INSULATIONS LTD | 43290 · other construction installation | 2024 | Active - Proposal to Strike off | SA15 |
| CMC ELECTRICAL SOLUTIONS LIMITED | 43210 · electrical installation | 2015 | Active - Proposal to Strike off | SA15 |
| STRANGE ELECTRICS LIMITED | 43210 · electrical installation | 2006 | Active - Proposal to Strike off | SA15 |
| BISBO PROPERTY LIMITED | 43210 · electrical installation; 43390; 46900 | 2017 | Active - Proposal to Strike off | SA15 |
| SOLSEN CYF. | 43210 · electrical installation | 2018 | Active - Proposal to Strike off | SA15 |
| BEN O'CONNOR ELECTRICAL SERVICES LIMITED | 43210 · electrical installation | 2019 | Liquidation | SA14 |
Heat and planning around Llanelli
In Llanelli last summer (2026) there were ≈6.6 nights that stayed above 18 °C — 11 times the 1991–2020 average of 0.6 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities). The figure is the household-weighted mean of 4 postcode districts where these offices are registered.
1% of sampled postcodes in Llanelli sit in a conservation area (2,585 live postcodes across 4 districts).
In Wales an air-source heat pump on a house can be permitted development under Class G when the conditions hold, including the MCS 020a noise limit of 37.0 dB(A) (§3.2 Step 8).
Companies House snapshot 1 Sep 2026, retrieved 25 Sep 2026. The address shown is the registered office, not a verified operating base. This catalogue is a directory of incorporated businesses, not an exhaustive installer register. Hot nights: ERA5-ARCO, June–August, minimum at or above 18 °C, household-weighted across the districts where these offices are registered, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points, snapshot 25 Sep 2026. Distances are an equirectangular approximation to 0.1 km.
Better than a town directory that only lists names: each plumbing company links to its Companies House record and the local hot-night count.