Home / Installers / Witham
G J MARINER AND SON LIMITED: plumbing, heating and air-conditioning company in Witham
G J MARINER AND SON LIMITED is an active limited company (no. 05222059), incorporated in 2004, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in CM8 (Witham), and 138 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
138 similar companies within 10 km. Witham
What homes around CM8 need
In CM8 last summer (2026) there were ≈18 nights that stayed above 18 °C — 5 times the 1991–2020 average of 3.6 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities).
13% of sampled postcodes in CM8 sit in a conservation area (on-record, 923 live postcodes).
In England 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 |
|---|---|---|---|
| FJA PLUMBING & HEATING LIMITED | 13567482 | CM8 | under 0.1 km |
| SOWMAN PLUMBING AND HEATING LIMITED | 04954135 | CM8 | ≈0.2 km |
| ASSOCIATED PLUMBING LIMITED | 03639633 | CM8 | ≈0.4 km |
| CJB MECHANICAL SERVICES LTD | 16519778 | CM8 | ≈0.5 km |
| D J BATHROOMS & PROPERTY MAINTENANCE LTD | 11402853 | CM8 | ≈0.7 km |
| TESLA M&E LTD | 13919093 | CM8 | ≈0.8 km |
| IDEAL CLIMATE LIMITED | 12233542 | CM8 | ≈0.9 km |
| WE DO DRAINS LTD | 14760417 | CM8 | ≈0.9 km |
| MERIDIAN MECHANICAL LIMITED | 17310200 | CM8 | ≈1.1 km |
| JBCOOLINGSOLUTIONS LTD | 17348089 | CM8 | ≈1.1 km |
Company record
| Field | Value |
|---|---|
| Company number | 05222059 |
| Name | G J MARINER AND SON LIMITED |
| Status | Active |
| Incorporated | 3 Sep 2004 |
| SIC | 43220 · plumbing, heat and air-conditioning installation |
| Registered office postcode | CM8 1BJ |
| Outcode | CM8 |
| Nation | England |
| 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 05222059 |
Companies House record: G J MARINER AND SON LIMITED, company 05222059, 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.