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J WILLIAMS PLUMBING AND HEATING LIMITED: plumbing, heating and air-conditioning company in St Asaph
J WILLIAMS PLUMBING AND HEATING LIMITED is an active limited company (no. 12059015), incorporated in 2019, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in LL17 (St Asaph), and 65 similar companies have a registered office within 10 km. If you need an MCS-certified air-to-air installer, MCS lists 0 installers certified for air-to-air heat pumps yet (checked 25 Sep 2026), so no company here can offer the £2,500 grant route today.
Active
Within 10 km
65 similar companies within 10 km. St Asaph
What homes around LL17 need
In LL17 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).
10% of sampled postcodes in LL17 sit in a conservation area (on-record, 234 live postcodes).
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).
Hot nights: ERA5-ARCO, June–August, minimum at or above 18 °C, 2026 against the 1991–2020 mean, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points, snapshot 25 Sep 2026. Noise limit from the decision contract, checked 25 Sep 2026.
Nearest similar companies
| Company | Number | District | Distance |
|---|---|---|---|
| BRIAN W. PROFFIT PLUMBING & HEATING ENGINEERS LTD. | 04677838 | LL17 | under 0.1 km |
| T.T. DRAINAGE AND PLUMBING SERVICES LIMITED | 04836251 | LL17 | under 0.1 km |
| A. JONES & SON (GAS SERVICES) LIMITED | 05870626 | LL17 | under 0.1 km |
| PETER WARD PLUMBING & HEATING LIMITED | 05973562 | LL17 | under 0.1 km |
| KELLY & OWEN PLUMBING & HEATING LIMITED | 07245443 | LL17 | under 0.1 km |
| CLWYD HEATING RENEWABLE ENERGY SERVICES LIMITED | 08256578 | LL17 | under 0.1 km |
| D T JONES TRADING LIMITED | 08263637 | LL17 | under 0.1 km |
| N W BIOMASS LTD | 09422292 | LL17 | under 0.1 km |
| EXCELHEAT SOLUTIONS LTD | 09767960 | LL17 | under 0.1 km |
| HYDRO PLUMBING & HEATING LTD | 13609909 | LL17 | under 0.1 km |
Company record
| Field | Value |
|---|---|
| Company number | 12059015 |
| Name | J WILLIAMS PLUMBING AND HEATING LIMITED |
| Status | Active |
| Incorporated | 19 Jun 2019 |
| SIC | 43220 · plumbing, heat and air-conditioning installation |
| Registered office postcode | LL17 0JA |
| Outcode | LL17 |
| Nation | Wales |
| Air-to-air signal | not yet observed, checked 25 Sep 2026 |
| F-Gas | not yet observed, checked 25 Sep 2026 |
| MCS air-to-air | not yet observed, checked 25 Sep 2026 |
| Retrieved | 25 Sep 2026 |
| Dataset | https://download.companieshouse.gov.uk/BasicCompanyDataAsOneFile-2026-09-01.zip |
| Companies House page | Company 12059015 |
Companies House record: J WILLIAMS PLUMBING AND HEATING LIMITED, company 12059015, status Active, 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. Snapshot 1 Sep 2026, retrieved 25 Sep 2026. The 10 km count is equirectangular to 0.1 km. MCS air-to-air confirmed in this catalogue: 0, checked 25 Sep 2026.
Better than a reviews catalogue: the Companies House record, the district hot-night count and the MCS air-to-air observation are on one page.