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SO18: plumbing, heating and air-conditioning companies in Southampton
SO18 (Southampton) has 16 plumbing, heating and air-conditioning companies registered here (SIC 43220) and 41 electrical and other installation companies (Companies House, 1 Sep 2026); 0 are MCS-certified for air-to-air yet. If the summer is the question, SO18 had ≈7 nights above 18 °C in 2026 (5 times the 1991–2020 average of 1.3).
SO18
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BLUE DIAMOND HEATING SERVICES LIMITED, incorporated 2017, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| BLUE DIAMOND HEATING SERVICES LIMITED | 2017 | Active | SO18 |
| BRENNAN PLUMBING & HEATING LIMITED | 2007 | Active | SO18 |
| CONSTRUCTIONS MAX LTD | 2017 | Active | SO18 |
| ENVIROTHERMAL HEATING SOLUTIONS LTD | 2019 | Active - Proposal to Strike off | SO18 |
| GEORGE WILLIS LIMITED | 2017 | Active - Proposal to Strike off | SO18 |
| GLC PLUMBING & HEATING LTD | 2012 | Active | SO18 |
| H HEATING AND PLUMBING LTD | 2026 | Active | SO18 |
| HAMPSHIRE PLUMBING & GAS LTD | 2015 | Liquidation | SO18 |
| INPUT BATHROOMS LIMITED | 2019 | Active | SO18 |
| M CURTIS GAS SERVICES LIMITED | 2019 | Active | SO18 |
| M D JONES PLUMBING AND HEATING LTD | 2023 | Active | SO18 |
| MAYNARDS SERVICES LIMITED | 2019 | Active | SO18 |
| PINFOLDS MECHANICAL LTD | 2017 | Active | SO18 |
| PRIORITY COOLING LTD | 2012 | Active | SO18 |
| VK PLUMBING & BATHROOMS LTD | 2021 | Active - Proposal to Strike off | SO18 |
| WESTOAK PLUMBING LTD | 2020 | Active | SO18 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| AIJ ELECTRICS LIMITED | 43210 · electrical installation | 2014 | Active | SO18 |
| ALR ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2015 | Active | SO18 |
| CHANNELL INSTALLATIONS LTD | 43210 · electrical installation; 43290 · other construction installation | 2011 | Active | SO18 |
| CONSTRUCTION CO SERVICES LTD | 43210 · electrical installation; 43341; 43999 | 2026 | Active | SO18 |
| CRM (SOUTHERN) LTD | 43290 · other construction installation | 2013 | Active | SO18 |
| D&D HOME IMPROVEMENTS LTD | 43290 · other construction installation | 2025 | Active | SO18 |
| DANIEL WATTS LIMITED | 43210 · electrical installation; 33150 | 2018 | Active - Proposal to Strike off | SO18 |
| DIVINE INSIGHT GLOBAL LIMITED | 43210 · electrical installation; 46390; 47710; 47910 | 2026 | Active | SO18 |
| DME ELECTRICAL LTD | 43210 · electrical installation | 2016 | Active - Proposal to Strike off | SO18 |
| EDGE SOUTHERN MECHANICAL & ELECTRICAL LTD | 43210 · electrical installation | 2026 | Active | SO18 |
| ELJ LTD | 43210 · electrical installation | 2011 | Active | SO18 |
| ESS 1 ELECTRICAL SOLUTIONS LTD | 43210 · electrical installation | 2017 | Active | SO18 |
| G&D 2017 LIMITED | 43210 · electrical installation; 64991 | 2017 | Active | SO18 |
| G&H ELECTRICAL LTD | 43210 · electrical installation | 2022 | Active | SO18 |
| G.S WHITE ELECTRICAL LTD. | 43210 · electrical installation | 2018 | Active | SO18 |
| GK INTERNATIONAL MARINE LTD | 43210 · electrical installation; 43999 | 2018 | Active | SO18 |
| GLC BATHROOM INSTALLATIONS LTD | 43290 · other construction installation; 43310; 43320; 43330 | 2022 | Active | SO18 |
| H.A ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2022 | Active | SO18 |
| HAMPSHIRE GLASS AND WINDOW SOLUTIONS LIMITED | 43290 · other construction installation | 2023 | Active | SO18 |
| HARRINGTON ELECTRICAL CONTRACTOR LTD | 43210 · electrical installation | 2024 | Active | SO18 |
| IGA SIGNALLING LIMITED | 43210 · electrical installation; 42120 | 2011 | Active | SO18 |
| IMAGINE ELECTRICAL LTD | 43210 · electrical installation | 2024 | Active | SO18 |
| J VOLT ELECTRICAL LIMITED | 43210 · electrical installation | 2024 | Active | SO18 |
| JB UTILITY SERVICES LTD | 43290 · other construction installation; 42210; 42220 | 2017 | Active | SO18 |
| JCM SERVICES LIMITED | 43210 · electrical installation; 59113 | 2022 | Active | SO18 |
| JEM ELECTRICAL LTD | 43210 · electrical installation | 2022 | Active | SO18 |
| JRB CARPENTRY LTD | 43290 · other construction installation; 16230 | 2019 | Active - Proposal to Strike off | SO18 |
| MAYNARDS (HOLDINGS) LTD | 43210 · electrical installation | 2015 | Active | SO18 |
| MEELEC ELECTRICAL LTD | 43210 · electrical installation | 2026 | Active | SO18 |
| MK UK PROJECTS UK LIMITED | 43290 · other construction installation; 41100; 41201; 41202 | 2024 | Active | SO18 |
| PW MNE SOLUTIONS LTD | 43210 · electrical installation | 2019 | Active | SO18 |
| R C RUSSELL ELECTRICAL LIMITED | 43210 · electrical installation | 2014 | Active | SO18 |
| RIVERSIDE ELECTRICAL & PAT TESTING LTD | 43210 · electrical installation | 2024 | Active | SO18 |
| S B HURCOMBE ELECTRICAL LTD | 43210 · electrical installation | 2014 | Active | SO18 |
| SHELLEY CONSTRUCTION SERVICES LIMITED | 43290 · other construction installation; 41201 | 2022 | Active | SO18 |
| SHS HANTS LTD | 43290 · other construction installation | 2013 | Active | SO18 |
| SJ ELECTRIC LTD | 43210 · electrical installation | 2022 | Active | SO18 |
| SOLID ELECTRICS LIMITED | 43210 · electrical installation | 2019 | Active | SO18 |
| SPARKY RENOVATIONS LTD | 43210 · electrical installation; 43341; 43999 | 2024 | Active | SO18 |
| THORNE FENCING LIMITED | 43290 · other construction installation; 46730 | 2022 | Active | SO18 |
| THOROLD ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2014 | Active | SO18 |
What homes around SO18 need
In SO18 last summer (2026) there were ≈7 nights that stayed above 18 °C — 5 times the 1991–2020 average of 1.3 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities).
1% of sampled postcodes in SO18 sit in a conservation area (on-record, 938 live postcodes).
In England 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 for SO18, June–August, minimum at or above 18 °C, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points in SO18, snapshot 25 Sep 2026.
Better than a town-wide list: these are the registered offices in SO18, with that district's hot nights and planning rule.