Milford Haven: plumbing, heating and air-conditioning companies
Milford Haven has 13 plumbing, heating and air-conditioning companies (SIC 43220) and 26 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 SA73, summer 2026 had ≈6 nights above 18 °C there (7 times the 1991–2020 average of 0.9).
SIC 43220
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ALL-WAYS STAINLESS SERVICES LIMITED, incorporated 2007, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| FLOTECH-WALES LTD | 2025 | Active | SA73 |
| MCGUIRES & SON LTD | 2024 | Active | SA73 |
| AT PLUMBING (PEMBS) LTD | 2024 | Active | SA73 |
| JARRED CAMPBELL PLUMBING AND HEATING LTD | 2023 | Active | SA73 |
| ALL-WAYS STAINLESS SERVICES LIMITED | 2007 | Active | SA73 |
| KT'S BATHROOM ADAPTATIONS LIMITED | 2026 | Active | SA73 |
| LEAK IN LIMITED | 2019 | Active | SA73 |
| PEMBROKESHIRE BUILDING & PLUMBING SUPPLIES LIMITED | 2012 | Active | SA73 |
| FIRST RATE HOME SERVICES LTD | 2022 | Active | SA73 |
| BRISTOW REFRIGERATION LTD | 2024 | Active | SA73 |
| MARK WILSON & SON PLUMBING LIMITED | 2025 | Active | SA73 |
| MARK WILSON PLUMBING LIMITED | 2016 | Active | SA73 |
| RK PLUMBING & HEATING LTD | 2010 | Liquidation | SA73 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| DP STOVES & FIREPLACES LTD | 43290 · other construction installation; 43390 | 2021 | Active | SA73 |
| D & M ELECTRIX LIMITED | 43210 · electrical installation | 2008 | Active | SA73 |
| WEST WALES LEISURE LTD | 43290 · other construction installation | 2025 | Active | SA73 |
| K & R PROPERTY MANAGEMENT LTD | 43210 · electrical installation; 33140; 41100 | 2014 | Active | SA73 |
| CL WICKS SAFETY LTD | 43290 · other construction installation; 84240 | 2023 | Active | SA73 |
| FUSION INSTALLS LTD | 43210 · electrical installation | 2025 | Active | SA73 |
| ELECTRIFYWALES LIMITED | 43210 · electrical installation | 2021 | Active | SA73 |
| P & H SERVICES (SOUTH WALES) LIMITED | 43290 · other construction installation | 2004 | Active | SA73 |
| THERMALVENT (WALES & WEST) LIMITED | 43290 · other construction installation | 2018 | Active | SA73 |
| KGM WELDING LIMITED | 43290 · other construction installation | 2020 | Active | SA73 |
| IRAQ ENGINEERING & CONSTRUCTION LIMITED | 43290 · other construction installation | 2003 | Active | SA73 |
| VENTFAB LTD | 43290 · other construction installation | 2025 | Active | SA73 |
| ML HV SERVICE LTD | 43210 · electrical installation | 2021 | Active | SA73 |
| HALL INSULATION LTD | 43290 · other construction installation | 2019 | Active | SA73 |
| AGL HV SERVICES LTD | 43210 · electrical installation | 2018 | Active | SA73 |
| L A HOLMES AND DAUGHTERS LTD | 43290 · other construction installation; 28110; 42910; 42990 | 2022 | Active | SA73 |
| MORGAN RICHARDS ELECTRICAL LTD | 43210 · electrical installation | 2026 | Active | SA73 |
| SWITCHED ON SOLAR LTD | 43210 · electrical installation | 2022 | Active | SA73 |
| VOLTARIS POWER LTD | 43210 · electrical installation | 2026 | Active | SA73 |
| LING ELECTRICAL LTD | 43210 · electrical installation | 2016 | Active | SA73 |
| ENERGRO LIMITED | 43290 · other construction installation | 2026 | Active | SA73 |
| NSE (WALES) LIMITED | 43210 · electrical installation | 2006 | Active | SA73 |
| PEMBROKESHIRE SOLAR LTD | 43210 · electrical installation; 43290 · other construction installation | 2024 | Active | SA73 |
| CURRY'S BUILDING & PLASTERING CONTRACTORS LTD | 43290 · other construction installation | 2019 | Active - Proposal to Strike off | SA73 |
| D A INSPECTION LIMITED | 43290 · other construction installation | 2019 | Active - Proposal to Strike off | SA73 |
| SCOTT WALTERS LIMITED | 43290 · other construction installation | 2017 | Active - Proposal to Strike off | SA73 |
Heat and planning around Milford Haven
In Milford Haven last summer (2026) there were ≈6 nights that stayed above 18 °C — 7 times the 1991–2020 average of 0.9 (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.
9% of sampled postcodes in Milford Haven sit in a conservation area (629 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.