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N3: plumbing, heating and air-conditioning companies in London
N3 (London) has 32 plumbing, heating and air-conditioning companies registered here (SIC 43220) and 68 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, N3 had ≈12 nights above 18 °C in 2026 (8 times the 1991–2020 average of 1.6).
N3
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24 - 7 EMERGENCY DRAINAGE LIMITED, incorporated 2023, status Active - Proposal to Strike off.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| 24 - 7 EMERGENCY DRAINAGE LIMITED | 2023 | Active - Proposal to Strike off | N3 |
| AIR TECHNOLOGY PRODUCTS LTD | 2021 | Active | N3 |
| ALEPH HEATING LTD | 2020 | Active | N3 |
| BATHKITCHEN RENOVATION LTD | 2025 | Active | N3 |
| BEFIX LIMITED | 2023 | Active | N3 |
| BESPOKE HEAT PUMP SYSTEMS LTD | 2021 | Active | N3 |
| BRIAN CHICK LIMITED | 2003 | Active - Proposal to Strike off | N3 |
| CONNAUGHT PLUMBING AND HEATING LTD | 2024 | Active | N3 |
| DANPLUMBING LTD | 2025 | Active | N3 |
| DEENE PLUMBING HEATING & GAS LIMITED | 2014 | Active | N3 |
| GOLDEN PIN LIMITED | 2015 | Active | N3 |
| GT PLUMBINGS & HEATING LTD | 2020 | Active | N3 |
| HEROES ON HAND LIMITED | 2020 | Active | N3 |
| HIGH EFFICIENCY PLUMBING AND HEATING LTD | 2014 | Active | N3 |
| HITGAS LTD | 2011 | Active | N3 |
| KAS COMMERCIAL LIMITED | 2016 | Active | N3 |
| KAS RESIDENTIAL LIMITED | 2016 | Active | N3 |
| LOCAL PLUMBER NEAR ME LIMITED | 2018 | Active - Proposal to Strike off | N3 |
| LONDON PLUMBING AND HEATING SOLUTIONS LIMITED | 2020 | Active - Proposal to Strike off | N3 |
| MAINTRADE ENTERPRISES LIMITED | 2003 | Active | N3 |
| MULTI PLUMBERS LIMITED | 2013 | Active | N3 |
| ONISE PLUMBING LIMITED | 2025 | Active | N3 |
| OPTIMALLIA LTD | 2025 | Active - Proposal to Strike off | N3 |
| PEACHTREE PLUMBING LTD | 2011 | Active - Proposal to Strike off | N3 |
| R W PLUMBING AND HEATING LIMITED | 1987 | Active | N3 |
| RAPID RESPONSE 24 LIMITED | 2019 | Active - Proposal to Strike off | N3 |
| RITEAIR LIMITED | 2018 | Active | N3 |
| SMART INSTALLATIONS SOLUTIONS LTD | 2023 | Active | N3 |
| THAMES PLUMBING & GAS LIMITED | 2016 | Active | N3 |
| TIP TOP LOFT CONVERSION LIMITED | 2023 | Active | N3 |
| WATERHOUSE M&E LTD | 2020 | Active - Proposal to Strike off | N3 |
| YKS GROUP LIMITED | 2023 | Active | N3 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| AB ROONEY SERVICES LTD | 43210 · electrical installation | 2017 | Active | N3 |
| ABBY.IR LIMITED | 43210 · electrical installation; 33140 | 2025 | Active | N3 |
| ABLE CANOPIES LIMITED | 43290 · other construction installation; 43390 | 2005 | Active | N3 |
| ADRIAN KORNECKI LTD | 43290 · other construction installation; 73110; 90020 | 2017 | Active | N3 |
| AIM GROWTH LTD | 43290 · other construction installation; 41202; 43390 | 2022 | Active | N3 |
| AKAM SOLUTIONS LTD | 43210 · electrical installation; 33120; 43390; 81222 | 2026 | Active | N3 |
| ALFAKOBANS LIMITED | 43290 · other construction installation; 43341 | 2026 | Active | N3 |
| APL ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2019 | Active | N3 |
| ASTRA ELECTRICS LTD | 43210 · electrical installation | 2017 | Active - Proposal to Strike off | N3 |
| AZRA IT TECHNOLOGY LTD | 43210 · electrical installation; 62020; 62090 | 2019 | Active - Proposal to Strike off | N3 |
| BASK CONSTRUCTION LTD | 43290 · other construction installation; 41201 | 2018 | Active | N3 |
| BC MAINTENANCE AND DEVELOPMENTS LIMITED | 43210 · electrical installation | 2024 | Active | N3 |
| BEECHCROFT SERVICES LIMITED | 43210 · electrical installation | 2019 | Active - Proposal to Strike off | N3 |
| BERCO LTD | 43290 · other construction installation; 41201; 41202; 43999 | 2019 | Active | N3 |
| BERLIN ENERGY TRADING (UK) LTD | 43210 · electrical installation; 42220; 46190; 46900 | 2025 | Active | N3 |
| BESTER ELECTRICAL LIMITED | 43210 · electrical installation | 2021 | Active | N3 |
| BPE SMART SOLUTIONS LTD | 43210 · electrical installation; 41100; 43120; 43390 | 2021 | Active | N3 |
| BULLSMOOR MANOR LTD | 43290 · other construction installation; 41201; 41202; 68100 | 2024 | Active | N3 |
| CLACKSTONE LTD | 43210 · electrical installation; 61100 | 2017 | Active - Proposal to Strike off | N3 |
| CLADDING CONSULTING LTD | 43290 · other construction installation; 43390; 43999; 74901 | 2021 | Active | N3 |
| CLASSY COUTURE LIMITED | 43210 · electrical installation; 47990 | 2019 | Active | N3 |
| COMPARTMENTATION SOLUTIONS LIMITED | 43290 · other construction installation; 43390; 43999; 74901 | 2025 | Active | N3 |
| CTQ CONSTRUCTION & MAINTENANCE LTD | 43290 · other construction installation | 2021 | Active | N3 |
| D A L SERVICES LIMITED | 43210 · electrical installation | 2007 | Active | N3 |
| DANY TIN LIMITED | 43210 · electrical installation | 2016 | Active | N3 |
| DAY1 SOLAR LIMITED | 43210 · electrical installation | 2025 | Active | N3 |
| DIRECT ELECTRICIANS LONDON LTD | 43210 · electrical installation | 2019 | Active | N3 |
| DR LIFT SERVICES LTD | 43290 · other construction installation; 71129 | 2023 | Active | N3 |
| E.K.W ELECTRICAL SERVICES LIMITED | 43210 · electrical installation | 2010 | Active | N3 |
| ELCOM PROJECTS LIMITED | 43210 · electrical installation | 2009 | Active | N3 |
| ELDI LIFT INSTALLATIONS LTD | 43290 · other construction installation | 2020 | Active | N3 |
| ELECS TECHNOLOGY LTD | 43210 · electrical installation; 42220; 46520; 71122 | 2021 | Active | N3 |
| ELECTRICORAL LTD | 43210 · electrical installation; 33140 | 2024 | Active | N3 |
| EMPRICS GROUP LTD | 43210 · electrical installation | 2019 | Active | N3 |
| ENTPROTECH LTD | 43210 · electrical installation | 2018 | Active | N3 |
| EV POINT LTD | 43210 · electrical installation | 2021 | Active | N3 |
| GRANEX MARBLE LTD | 43290 · other construction installation; 43330 | 2014 | Active | N3 |
| HIGHLIGHTS FLOODLIGHTING LIMITED | 43210 · electrical installation | 1999 | Active | N3 |
| HITECHNO LTD | 43210 · electrical installation; 80200 | 2024 | Active | N3 |
| HOME COMFORT ENTERPRISES LTD | 43210 · electrical installation; 46130; 47990 | 2021 | Active | N3 |
| HYGIENIK SYSTEMS LIMITED | 43290 · other construction installation | 2002 | Active | N3 |
| INSPIRED DESIGNS (BUILDING) LIMITED | 43210 · electrical installation; 70229 | 2009 | Active | N3 |
| KSI SOLAR LTD | 43210 · electrical installation; 46180 | 2022 | Active | N3 |
| LAND LOGICAL AGGREGATES LIMITED | 43290 · other construction installation | 2012 | Active | N3 |
| MAXFRI SYSTEMS LIMITED | 43210 · electrical installation | 2023 | Active | N3 |
| NOALIFT INSTALLATIONS LTD. | 43290 · other construction installation | 2016 | Active - Proposal to Strike off | N3 |
| OKTA CONSTRUCTION LIMITED | 43290 · other construction installation; 41201; 41202 | 2020 | Active | N3 |
| OMKA ENERGY LTD | 43210 · electrical installation; 43290 · other construction installation | 2019 | Active | N3 |
| PATRIOT DB SERVICES LTD | 43290 · other construction installation; 41202; 43110; 43330 | 2014 | Active - Proposal to Strike off | N3 |
| PPK SALES & MARKETING LTD | 43290 · other construction installation; 43330; 43910; 43991 | 2014 | Liquidation | N3 |
| PRO 2 CONSTRUCTION LTD | 43290 · other construction installation | 2018 | Active | N3 |
| PRO D BUILDERS LTD | 43290 · other construction installation | 2022 | Active | N3 |
| PRO D ELECTRICAL LTD | 43210 · electrical installation | 2025 | Active | N3 |
| RED AND BLACK SERVICES LTD | 43210 · electrical installation | 2023 | Active | N3 |
| RED PHASE ELECTRICAL LTD | 43210 · electrical installation; 33140 | 2026 | Active | N3 |
| ROAD MARKING SOLUTIONS LTD | 43290 · other construction installation | 2023 | Active | N3 |
| ROSS SOLUTION PROJECTS LIMITED | 43290 · other construction installation | 2013 | Active | N3 |
| RSCZ2 LIMITED | 43210 · electrical installation | 2011 | Active - Proposal to Strike off | N3 |
| RSCZ3 LIMITED | 43210 · electrical installation | 2011 | Active - Proposal to Strike off | N3 |
| SMART SCENERY AND RIGGING LTD | 43290 · other construction installation | 2024 | Active | N3 |
| SOLAR ELECTRICAL LTD | 43210 · electrical installation | 2019 | Active | N3 |
| SPARKZ ELECTRICALS LTD | 43210 · electrical installation; 71129 | 2022 | Active | N3 |
| SUREWALL LIMITED | 43290 · other construction installation; 43999 | 2020 | Active | N3 |
| TARGETDAMPANDMOULD LTD | 43290 · other construction installation; 43390; 71111; 81222 | 2026 | Active | N3 |
| THEYDON ELECTRICAL LIMITED | 43210 · electrical installation | 2012 | Active | N3 |
| UNICONTROL LIMITED | 43210 · electrical installation | 2016 | Active | N3 |
| WINCHMORE ELECTRICAL SERVICES LIMITED | 43210 · electrical installation | 2016 | Active | N3 |
| WIREWISE ELECTRIC LIMITED | 43210 · electrical installation | 2024 | Active | N3 |
What homes around N3 need
In N3 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).
4% of sampled postcodes in N3 sit in a conservation area (on-record, 628 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 N3, June–August, minimum at or above 18 °C, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points in N3, snapshot 25 Sep 2026.
Better than a town-wide list: these are the registered offices in N3, with that district's hot nights and planning rule.