St Asaph: plumbing, heating and air-conditioning companies
St Asaph has 23 plumbing, heating and air-conditioning companies (SIC 43220) and 28 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 LL17, summer 2026 had ≈4 nights above 18 °C there (8 times the 1991–2020 average of 0.5).
SIC 43220
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A M WILLIAMS PLUMBING AND HEATING LIMITED, incorporated 2017, status Active.
Plumbing, heating and air-conditioning companies
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| ENTERPRISE COMMUNICATION SOLUTIONS LIMITED | 43210 · electrical installation | 2000 | Active | LL17 |
| TAI ELWY LIMITED | 43290 · other construction installation; 41202; 43999 | 2012 | Active | LL17 |
| 360 WIND SERVICES LTD | 43290 · other construction installation | 2025 | Active | LL17 |
| 365 WIND LTD | 43290 · other construction installation | 2026 | Active | LL17 |
| ARTHUR HAPGOOD LIMITED | 43290 · other construction installation | 1962 | Active | LL17 |
| KHS ELECTRICAL (NW) LTD | 43210 · electrical installation | 2020 | Active | LL17 |
| P L HAMBI LTD | 43290 · other construction installation | 2026 | Active | LL17 |
| SOLAR247 LIMITED | 43210 · electrical installation | 2022 | Active | LL17 |
| WINDTECH SOLUTIONS LIMITED | 43210 · electrical installation; 35110; 43999 | 2023 | Active | LL17 |
| D O ROBERTS LIMITED | 43210 · electrical installation; 43290 · other construction installation | 2020 | Active | LL17 |
| D W JONES LIMITED | 43290 · other construction installation | 2024 | Active | LL17 |
| DAVIES CONNECTIONS LIMITED | 43210 · electrical installation | 2021 | Active | LL17 |
| E D R INTERIORS LIMITED | 43290 · other construction installation | 2007 | Active | LL17 |
| FUSETEC LIMITED | 43210 · electrical installation | 2016 | Active | LL17 |
| LIVINGSTONE ELECTRICAL LTD | 43210 · electrical installation | 2024 | Active | LL17 |
| MP ELECTRICAL NW LTD | 43210 · electrical installation | 2026 | Active | LL17 |
| MP ENERGY GROUP LTD | 43210 · electrical installation | 2026 | Active | LL17 |
| NORTH COAST HEATING AND RENEWABLES LTD | 43290 · other construction installation | 2026 | Active | LL17 |
| THOMPSON CONTRACTORS LIMITED | 43210 · electrical installation | 2015 | Active | LL17 |
| PTG ELECTRICAL LTD | 43210 · electrical installation | 2017 | Active | LL17 |
| A J CONTRACTORS (NW) LIMITED | 43290 · other construction installation | 2025 | Active | LL17 |
| AI GLOBAL ROBOTICS LTD | 43210 · electrical installation; 33200 | 2022 | Active | LL17 |
| BLACKWAL LIMITED | 43290 · other construction installation; 43390; 68100 | 2024 | Active | LL17 |
| SUMMIT CEILINGS & PARTITIONS LIMITED | 43290 · other construction installation | 2011 | Active | LL17 |
| ENVISION HOME AND GARDENS LTD | 43290 · other construction installation; 41202 | 2025 | Active | LL17 |
| P MARSHALL ELECTRICAL CONTRACTORS LTD | 43210 · electrical installation | 2019 | Active | LL17 |
| REEN PERFORMANCE ENERGY LTD | 43290 · other construction installation | 2019 | Liquidation | LL17 |
| 360 WIND LTD | 43210 · electrical installation; 42220; 43120; 43341 | 2019 | Active - Proposal to Strike off | LL17 |
Heat and planning around St Asaph
In St Asaph last summer (2026) there were ≈4 nights that stayed above 18 °C — 8 times the 1991–2020 average of 0.5 (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.
10% of sampled postcodes in St Asaph sit in a conservation area (234 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.