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W1J: plumbing, heating and air-conditioning companies in London
W1J (London) has 4 plumbing, heating and air-conditioning companies registered here (SIC 43220) and 13 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, W1J had ≈12 nights above 18 °C in 2026 (8 times the 1991–2020 average of 1.6).
W1J
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4UNIMATE BOILERS AND BATHROOMS LIMITED, incorporated 2025, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| 4UNIMATE BOILERS AND BATHROOMS LIMITED | 2025 | Active | W1J |
| IGNITE CONTRACTORS LTD | 2025 | Active | W1J |
| LONDON ELECTRIX LTD | 2019 | Active - Proposal to Strike off | W1J |
| THE FLUSH ROYALE LIMITED | 2025 | Active | W1J |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| ARDENT ELECTRICAL & FACILITIES LTD | 43210 · electrical installation | 2021 | Active | W1J |
| DOMNA RENEWABLES LIMITED | 43290 · other construction installation | 2026 | Active | W1J |
| ENERGO TRADE LTD | 43210 · electrical installation; 46520; 46690; 46900 | 2023 | Active | W1J |
| GUARDIAN ANGELS PROPERTY LTD | 43290 · other construction installation; 41201; 41202; 80100 | 2025 | Active | W1J |
| KM ELECTRIC AND GAZ LIMITED | 43210 · electrical installation; 35210 | 2022 | Active | W1J |
| LONDON LIFT INSTALLATIONS LIMITED | 43290 · other construction installation | 2016 | Active - Proposal to Strike off | W1J |
| MAGISTRI CONSTRUCTION PLC | 43290 · other construction installation; 41201; 41202; 42110 | 2018 | Active | W1J |
| MJA PROJECTS LIMITED | 43210 · electrical installation | 2017 | Active | W1J |
| RANGE CONTRACTS LTD | 43290 · other construction installation | 2017 | Liquidation | W1J |
| RAPID DESIGN & CONSTRUCTION CONSULTANCY LIMITED | 43290 · other construction installation; 41100; 41201; 96090 | 2017 | Active - Proposal to Strike off | W1J |
| RETAIL READY LTD | 43290 · other construction installation; 41100; 43390 | 2015 | Active - Proposal to Strike off | W1J |
| SCANCON ENERGY SUPPLY LIMITED | 43290 · other construction installation; 25210; 42990 | 2014 | Active | W1J |
| SIMICUS CONSTRUCTION LTD | 43210 · electrical installation; 41100; 43390 | 2019 | Active | W1J |
What homes around W1J need
In W1J last summer (2026) there were ≈12 nights that stayed above 18 °C — 8 times the 1991–2020 average of 1.6 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities).
100% of sampled postcodes in W1J sit in a conservation area (on-record, 662 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 W1J, June–August, minimum at or above 18 °C, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points in W1J, snapshot 25 Sep 2026.
Better than a town-wide list: these are the registered offices in W1J, with that district's hot nights and planning rule.