Treharris: plumbing, heating and air-conditioning companies
Treharris has 7 plumbing, heating and air-conditioning companies (SIC 43220) and 15 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 CF46, summer 2026 had ≈4 nights above 18 °C there (24 times the 1991–2020 average of 0.2).
SIC 43220
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BCB RENEWABLES LTD, incorporated 2024, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| BCB RENEWABLES LTD | 2024 | Active | CF46 |
| W P KELLAND & SONS LIMITED | 2026 | Active | CF46 |
| STEVE KELLAND PLUMBING & HEATING LIMITED | 2012 | Active | CF46 |
| ECO PLUMB SERVICES LTD | 2020 | Active | CF46 |
| MY BOILER BREAKDOWN LTD | 2025 | Active | CF46 |
| SENW PLUMBING & HEATING LTD | 2020 | Active | CF46 |
| UHENERGY LTD | 2022 | Active - Proposal to Strike off | CF46 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| JT ELECTRICAL SERVICES (SW) LTD | 43210 · electrical installation | 2025 | Active | CF46 |
| MPS MAINTENANCE SERVICES LTD | 43290 · other construction installation | 2022 | Active | CF46 |
| POPPYBUILD DEVELOPMENTS LTD | 43210 · electrical installation; 43290 · other construction installation; 41100; 43390 | 2026 | Active | CF46 |
| GRH PROPERTY SERVICES LTD | 43290 · other construction installation; 41202; 43390; 81100 | 2026 | Active | CF46 |
| EVANS ELECTRICAL SW LTD | 43210 · electrical installation | 2025 | Active | CF46 |
| ANDREW WALKER ELECTRICAL SOLUTIONS LTD | 43210 · electrical installation | 2021 | Active | CF46 |
| APEX SPRINKLERS LTD | 43290 · other construction installation | 2024 | Active | CF46 |
| FUSION BUILDING SERVICES LTD | 43290 · other construction installation | 2021 | Active | CF46 |
| FUSION ELECTRICAL & BUILDING SERVICES ENGINEERING LTD | 43210 · electrical installation | 2013 | Active | CF46 |
| GMI ELECTRICAL LIMITED | 43210 · electrical installation | 2021 | Active | CF46 |
| JAMES WHITE BUILDING CONTRACTORS LTD | 43290 · other construction installation; 43390 | 2024 | Active | CF46 |
| JAMES WHITE CONSTRUCTION LTD | 43290 · other construction installation; 43390 | 2019 | Active | CF46 |
| JR WHITE BUILDING MAINTENANCE LTD | 43290 · other construction installation; 43390 | 2024 | Active | CF46 |
| SHAWFIX CONTRACTORS LTD | 43290 · other construction installation | 2021 | Active | CF46 |
| FOX ELECTRICAL AND BUILDING MAINTENANCE LTD | 43210 · electrical installation; 41202; 43390 | 2026 | Active | CF46 |
Heat and planning around Treharris
In Treharris last summer (2026) there were ≈4 nights that stayed above 18 °C — 24 times the 1991–2020 average of 0.2 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities). The figure is the household-weighted mean of 1 postcode districts where these offices are registered.
8% of sampled postcodes in Treharris sit in a conservation area (349 live postcodes across 1 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.