Cardiff: plumbing, heating and air-conditioning companies
Cardiff has 430 plumbing, heating and air-conditioning companies (SIC 43220) and 750 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 CF14, summer 2026 had ≈10 nights above 18 °C there (14 times the 1991–2020 average of 0.7).
SIC 43220
Open a company
A & N PLUMBING SERVICES LIMITED, incorporated 2008, status Active.
Postcode districts
Plumbing, heating and air-conditioning companies
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| JT PROJECT MANAGEMENT SERVICES LTD | 43290 · other construction installation | 2024 | Active | CF14 |
| TOTAL ELECTRICAL ENGINEERING LIMITED | 43210 · electrical installation | 2020 | Active | CF14 |
| VEDMORE ELECTRICAL SOLUTIONS LTD | 43210 · electrical installation; 33140 | 2024 | Active | CF14 |
| VERTEX CONSTRUCTION 01 LTD | 43290 · other construction installation; 41202 | 2026 | Active | CF24 |
| ADVANCED ELECTRICAL & FIRE LTD | 43210 · electrical installation | 2024 | Active | CF23 |
| OMNI DESIGN LIMITED | 43290 · other construction installation; 43330; 43390; 43999 | 2005 | Active | CF23 |
| J WHITE PLASTERING LTD | 43290 · other construction installation; 43310 | 2025 | Active | CF24 |
| OMEGA ELECTRICS LTD | 43210 · electrical installation | 2021 | Active | CF14 |
| SMART ELECTRICAL CONTRACTORS LIMITED | 43210 · electrical installation | 2020 | Active | CF24 |
| ELITE PROPERTY ELECTRICAL LTD | 43210 · electrical installation | 1999 | Active | CF24 |
| PROTEC SMART SOLUTIONS LTD | 43210 · electrical installation; 62090 | 2021 | Active | CF14 |
| BULLHORN BUILDERS LTD | 43290 · other construction installation; 43999 | 2026 | Active | CF24 |
| MIRIAM MODULAR BUILDINGS LTD | 43290 · other construction installation | 2025 | Active | CF24 |
| CORETECH INNOVATIONS LIMITED | 43210 · electrical installation; 46900; 47990; 77390 | 2025 | Active | CF24 |
| BE ECO ENERGY LIMITED | 43210 · electrical installation; 43290 · other construction installation; 33140; 66120 | 2024 | Active | CF23 |
| POWERFULL ELECTRICAL LTD. | 43210 · electrical installation; 43290 · other construction installation; 41202; 43999 | 2021 | Active | CF23 |
| AJW CONSTRUCTION (WALES) LIMITED | 43290 · other construction installation | 2013 | Active | CF24 |
| POWER-LEC BUILDING SERVICES LTD | 43210 · electrical installation; 41100; 41201; 41202 | 2024 | Active | CF14 |
| HEATHWOOD ELECTRICS LTD | 43210 · electrical installation | 2021 | Active | CF14 |
| S.R.T. (CARDIFF) LTD | 43290 · other construction installation; 43390 | 2017 | Active | CF14 |
| E D M ELECTRICAL LIMITED | 43210 · electrical installation | 2014 | Active | CF14 |
| O.V. BARTLETT & SONS (CARDIFF) LIMITED | 43210 · electrical installation | 1963 | Active | CF14 |
| L.H ELECTRICAL AND FIRE LTD | 43210 · electrical installation | 2024 | Active | CF14 |
| SP ELECTRICAL (SOUTH WALES) LTD | 43210 · electrical installation | 2022 | Active | CF14 |
| AM HAQ CONSTRUCTION LTD | 43290 · other construction installation; 41202; 43341; 43390 | 2024 | Active | CF24 |
| A J CREWS & CO LIMITED | 43210 · electrical installation | 1974 | Active | CF24 |
| PROTEC ELECTRICAL AND SECURITY SYSTEMS LIMITED | 43210 · electrical installation | 2009 | Active | CF14 |
| VISION ELECTRICAL SOLUTIONS(UK) LIMITED | 43210 · electrical installation | 2024 | Active | CF23 |
| VISIONSOLUTIONHOLDINGS LIMITED | 43210 · electrical installation; 41202 | 2024 | Active | CF23 |
| ST CONSTRUCTION EUROPE LTD | 43290 · other construction installation | 2023 | Active | CF24 |
| C&S CIVILS LTD | 43290 · other construction installation | 2017 | Active | CF14 |
| K PEPPER CONSTRUCTION LIMITED | 43290 · other construction installation | 2025 | Active | CF14 |
| FRANK VINCENT ELECTRICAL LTD | 43210 · electrical installation | 2024 | Active | CF14 |
| BRS ELECTRICAL SOLUTIONS LTD | 43210 · electrical installation | 2025 | Active | CF10 |
| FABRICOM LTD | 43290 · other construction installation | 2014 | Active | CF10 |
| GENESIS CONSTRUCTION & MAINTENANCE LTD | 43290 · other construction installation; 41201; 41202 | 2024 | Active | CF10 |
| GROUND ELECTRICAL & DEVELOPMENTS LTD | 43210 · electrical installation | 2026 | Active | CF10 |
| IEI ELECTRICAL & EMERGENCY LTD | 43210 · electrical installation | 2025 | Active | CF10 |
| PG99 ELECTRIX LTD | 43210 · electrical installation | 2026 | Active | CF10 |
| THE GOOD VERANDA COMPANY LTD | 43290 · other construction installation | 2026 | Active | CF10 |
| ANIES BUILDERS LTD | 43290 · other construction installation; 41202 | 2025 | Active | CF23 |
| MODIFI INTERIORS LTD | 43290 · other construction installation | 2024 | Active | CF14 |
| AM ELECTRICAL & TRAINING SERVICES LIMITED | 43210 · electrical installation; 85320 | 2023 | Active | CF23 |
| BGHEAT LIMITED | 43290 · other construction installation | 2002 | Active | CF10 |
| MARJ ELECTRICAL LTD | 43210 · electrical installation | 2026 | Active | CF14 |
| SINCLAIR ELECTRICAL CARDIFF LTD | 43210 · electrical installation | 2013 | Active | CF23 |
| AWEN FUTURES LTD | 43210 · electrical installation; 02100; 62020 | 2025 | Active | CF11 |
| EBIKECHARGINGSOCKETS.UK LIMITED | 43210 · electrical installation | 2022 | Active | CF11 |
| LIGHTWORK ELEC LTD | 43210 · electrical installation | 2025 | Active | CF11 |
| LOFT-INS-SPACE LIMITED | 43290 · other construction installation | 2020 | Active | CF11 |
| MH INDUSTRIAL AUTOMATION LTD | 43210 · electrical installation; 26512; 71121 | 2025 | Active | CF11 |
| R F BUILDING & UTILITIES LTD | 43290 · other construction installation; 41100; 41201; 41202 | 2020 | Active | CF11 |
| RADIUS CONTRACTING LIMITED | 43210 · electrical installation; 61100 | 2012 | Active | CF11 |
| STONE VALLEY WINDOWS LTD | 43290 · other construction installation | 2021 | Active | CF11 |
| ALTUM ORGANISATION LIMITED | 43290 · other construction installation | 2021 | Active | CF10 |
| 12 ELECTRICAL & EMERGENCY ELECTRICIAN LTD | 43210 · electrical installation | 2025 | Active | CF11 |
| RYMA BUILDING LTD | 43290 · other construction installation; 43310; 43320; 43390 | 2024 | Active | CF23 |
| AMROCK ELECTRICAL LTD | 43210 · electrical installation | 2019 | Active | CF23 |
| SJAD ELECTRICAL LTD | 43210 · electrical installation | 2017 | Active | CF11 |
| ASG ELECTRICAL INSTALLATIONS LIMITED | 43210 · electrical installation | 2010 | Active | CF23 |
| MARK THYME AUDIO VISUAL LTD | 43210 · electrical installation; 43390; 71122 | 2013 | Active | CF23 |
| CELTIC DEVELOPMENTS LTD | 43290 · other construction installation; 41201; 41202 | 2019 | Active | CF11 |
| MJD INSTALLS LIMITED | 43290 · other construction installation | 2023 | Active | CF23 |
| TREGANNA ELECTRICAL LTD | 43210 · electrical installation | 2021 | Active | CF11 |
| DAMP ARMOUR LIMITED | 43290 · other construction installation | 2015 | Active | CF24 |
| TP PEARSON & SON LIMITED | 43210 · electrical installation | 2022 | Active | CF5 |
| SONIK ELECTRICAL LTD | 43210 · electrical installation | 2012 | Active | CF24 |
| SMALLECTRICS LTD | 43210 · electrical installation | 2025 | Active | CF14 |
| FABER CONCEPT LIMITED | 43290 · other construction installation | 2006 | Active | CF14 |
| IOLO ENERGY LIMITED | 43210 · electrical installation | 2020 | Active | CF10 |
| THE INSULATION COMPANY UK LTD | 43290 · other construction installation | 2026 | Active | CF24 |
| FROST PROJECT SERVICES LTD | 43210 · electrical installation | 2026 | Active | CF10 |
| MARKLE ENGINEERING LIMITED | 43290 · other construction installation; 33160; 45200 | 2019 | Active | CF10 |
| MLW ELECTRICAL SOLUTIONS LTD | 43210 · electrical installation | 2025 | Active | CF14 |
| CONNECT ELECTRICAL INSTALLATIONS LIMITED | 43210 · electrical installation | 2012 | Active | CF11 |
| AMP ELECTRICAL (CARDIFF) LTD | 43210 · electrical installation | 2021 | Active | CF5 |
| A.R.B. ELECTRICAL LTD | 43210 · electrical installation | 1996 | Active | CF14 |
| CELTIC PRECAST LTD | 43290 · other construction installation | 2021 | Active | CF5 |
| FOCUS MEP LIMITED | 43210 · electrical installation | 2020 | Active | CF5 |
| NUVOLT LTD | 43210 · electrical installation | 2021 | Active | CF5 |
| CAG ELECTRICAL LTD | 43210 · electrical installation | 2020 | Active | CF11 |
| LIVVINGALE LIMITED | 43210 · electrical installation | 2018 | Active | CF5 |
| A CONNORS ELECTRICAL LTD | 43210 · electrical installation | 2022 | Active | CF24 |
| ACREVALE INSTALLATIONS LIMITED | 43290 · other construction installation | 2025 | Active | CF24 |
| JNJ PROJECT & FINANCIAL CONTROLS SERVICES LIMITED | 43290 · other construction installation; 70229; 81222 | 2018 | Active | CF24 |
| PHYSICAL ADAPTATION SOLUTIONS LIMITED | 43290 · other construction installation | 2017 | Active | CF24 |
| SPARKS & CO (SOLAR FORCE) LTD | 43210 · electrical installation | 2018 | Active | CF24 |
| TERRAFIRMA PAVING & RESIN LIMITED | 43290 · other construction installation | 2025 | Active | CF24 |
| HUW JONES LIGHTING LTD | 43210 · electrical installation | 2021 | Active | CF5 |
| CARDIFF ELECTRICAL HOME REWIRE LTD | 43210 · electrical installation | 2023 | Active | CF14 |
| THE SOLAR HOUSE (ENGLAND & WALES) LTD | 43210 · electrical installation | 2018 | Active | CF14 |
| AW MILLER LIMITED | 43290 · other construction installation; 41201; 41202 | 2022 | Active | CF11 |
| AYAZ DEVELOPMENTS LIMITED | 43290 · other construction installation; 43390 | 2024 | Active | CF11 |
| ZM ELECTRICIAN LTD | 43210 · electrical installation; 96090 | 2024 | Active | CF5 |
| AJWELSH ELECTRICAL LIMITED | 43210 · electrical installation | 2016 | Active | CF14 |
| FLAVOUR OF THE MONTH LIMITED | 43210 · electrical installation; 82990 | 2010 | Active | CF14 |
| KT ELECTRONICS LIMITED | 43210 · electrical installation | 2005 | Active | CF14 |
| N.D.LEE LTD | 43210 · electrical installation | 2015 | Active | CF14 |
| ILLUMELEC LTD | 43210 · electrical installation | 2021 | Active | CF14 |
| ORACLE ELECTRICS LTD | 43210 · electrical installation | 1998 | Active | CF14 |
Heat and planning around Cardiff
In Cardiff last summer (2026) there were ≈10.1 nights that stayed above 18 °C — 13 times the 1991–2020 average of 0.8 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities). The figure is the household-weighted mean of 10 postcode districts where these offices are registered.
7% of sampled postcodes in Cardiff sit in a conservation area (9,584 live postcodes across 10 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.