Pwllheli: plumbing, heating and air-conditioning companies
Pwllheli has 11 plumbing, heating and air-conditioning companies (SIC 43220) and 13 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 LL53, summer 2026 had ≈5 nights above 18 °C there (12 times the 1991–2020 average of 0.4).
SIC 43220
Open a company
ARWEL W WILLIAMS CYF, incorporated 2012, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| LLYN PLUMBING & HEATING LTD | 2020 | Active | LL53 |
| M WYNN PLUMBING CYF | 2010 | Active | LL53 |
| STUART LIVINGSTONE LTD | 2026 | Active | LL53 |
| T W WILLIAMS & SON LTD | 2014 | Active | LL53 |
| DYFFRYN HEATING LTD | 2022 | Active | LL53 |
| M P PLUMBING LIMITED | 2011 | Active | LL53 |
| MELA ENERGY LTD | 2020 | Active | LL53 |
| G JONES HEATING & PLUMBING LTD | 2007 | Active | LL53 |
| ARWEL W WILLIAMS CYF | 2012 | Active | LL53 |
| O L THOMAS PLUMBING & HEATING LIMITED | 2023 | Active | LL53 |
| GWRESOGI LTD | 2023 | Active | LL53 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| O.R. WILLIAMS LTD | 43210 · electrical installation | 2011 | Active | LL53 |
| 3E SMART CONTROL LTD | 43210 · electrical installation | 2006 | Active | LL53 |
| PENINSULA SECURITY LTD | 43210 · electrical installation; 80100 | 2022 | Active | LL53 |
| PENLLYN CONSERVATORIES LIMITED | 43290 · other construction installation; 43342 | 2003 | Active | LL53 |
| ECS123 LIMITED | 43210 · electrical installation | 2019 | Active | LL53 |
| EVAN EVANS ELECTRICAL LTD | 43210 · electrical installation | 2007 | Active | LL53 |
| HS DAVIES GROUNDWORKS LIMITED | 43290 · other construction installation; 43120; 43390; 43999 | 2017 | Active | LL53 |
| DJ WILLIAMS ELECTRICAL LIMITED | 43210 · electrical installation | 2015 | Active | LL53 |
| ALWYN ROBERTS ELECTRICIANS LIMITED | 43210 · electrical installation | 2016 | Active | LL53 |
| C EVANS ELECTRICAL LTD | 43210 · electrical installation | 2011 | Active | LL53 |
| DP JONES ELECTRICAL LIMITED | 43210 · electrical installation | 2018 | Active | LL53 |
| D MARC JONES LIMITED | 43290 · other construction installation | 2019 | Active - Proposal to Strike off | LL53 |
| HUGHES A WILLIAMS CYF | 43210 · electrical installation | 2010 | Active - Proposal to Strike off | LL53 |
Heat and planning around Pwllheli
In Pwllheli last summer (2026) there were ≈5 nights that stayed above 18 °C — 12 times the 1991–2020 average of 0.4 (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 Pwllheli sit in a conservation area (812 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.