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ONYX PLUMBING LTD: plumbing, heating and air-conditioning company in Brentwood
ONYX PLUMBING LTD is an active limited company (no. 07078352), incorporated in 2009, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in CM15 (Brentwood), and 367 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
367 similar companies within 10 km. Brentwood
What homes around CM15 need
In CM15 last summer (2026) there were ≈11 nights that stayed above 18 °C — 6 times the 1991–2020 average of 1.9 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities).
3% of sampled postcodes in CM15 sit in a conservation area (on-record, 595 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 |
|---|---|---|---|
| A-SOURCE PLUMBING LTD | 07656869 | CM15 | under 0.1 km |
| RYT-SOURCE MECHANICAL LTD | 15534749 | CM15 | under 0.1 km |
| RAY THERM HEATING SOLUTIONS LIMITED | 07057778 | CM15 | ≈0.4 km |
| A KILIAN SERVICES LTD | 07860726 | CM15 | ≈0.4 km |
| RESOLVE HEATING AND COOLING SERVICES LIMITED | 15341925 | CM15 | ≈0.4 km |
| A.BLAKE CONSTRUCTION LTD | 16049797 | CM15 | ≈0.4 km |
| VERLANDER UTILITIES LIMITED | 16231652 | CM15 | ≈0.4 km |
| LYUS PLUMBING SERVICES LTD | 06256083 | CM13 | ≈0.4 km |
| ABACUS AC SOLUTIONS LTD | 07787318 | CM13 | ≈0.4 km |
| PHILMECH LTD | 10422018 | CM13 | ≈0.4 km |
Company record
| Field | Value |
|---|---|
| Company number | 07078352 |
| Name | ONYX PLUMBING LTD |
| Status | Active |
| Incorporated | 17 Nov 2009 |
| SIC | 43220 · plumbing, heat and air-conditioning installation |
| Registered office postcode | CM15 8NL |
| Outcode | CM15 |
| 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 07078352 |
Companies House record: ONYX PLUMBING LTD, company 07078352, 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.