Holywell: plumbing, heating and air-conditioning companies
Holywell has 5 plumbing, heating and air-conditioning companies (SIC 43220) and 12 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 CH8, summer 2026 had ≈4 nights above 18 °C there (5 times the 1991–2020 average of 0.8).
SIC 43220
Open a company
H. JONES LTD, incorporated 2000, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| H. JONES LTD | 2000 | Active | CH8 |
| PHILL CLAYTON PLUMBING & HEATING LTD | 2015 | Active | CH8 |
| TECHNICAL GAS SOLUTIONS LTD | 2022 | Active | CH8 |
| MOORE & SON (HOLYWELL) LIMITED | 2000 | Active | CH8 |
| MSG ELECTRICAL SERVICES LTD | 2021 | Active | CH8 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| ALL ROUND CONSTRUCTION LTD | 43290 · other construction installation | 2018 | Active | CH8 |
| SAFETY FIRST ELECTRICAL LIMITED | 43210 · electrical installation | 2006 | Active | CH8 |
| LMR CONTRACTING LTD | 43210 · electrical installation; 42990 | 2024 | Active | CH8 |
| SOLAR FIX NORTH WEST & WALES LTD | 43210 · electrical installation | 2026 | Active | CH8 |
| AMLEC LTD | 43210 · electrical installation | 2018 | Active | CH8 |
| ELIOT DAVIES ELECTRICAL CONTRACTORS LIMITED | 43210 · electrical installation | 2026 | Active | CH8 |
| MORRIS GRANT LTD | 43210 · electrical installation | 2023 | Active | CH8 |
| SAFE LIFTING OPERATIONS LTD | 43290 · other construction installation | 2020 | Active | CH8 |
| KINGSPAN ENERGY LIMITED | 43210 · electrical installation | 1978 | Active | CH8 |
| MVC ELECTRICAL LIMITED | 43210 · electrical installation | 2014 | Active | CH8 |
| LLAN DA ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2025 | Active | CH8 |
| MYTRA LIMITED | 43290 · other construction installation; 68209; 69201; 70221 | 2010 | Active | CH8 |
Heat and planning around Holywell
In Holywell last summer (2026) there were ≈4 nights that stayed above 18 °C — 5 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 1 postcode districts where these offices are registered.
15% of sampled postcodes in Holywell sit in a conservation area (680 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.