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DIAMOND PLUMBERS LIMITED: plumbing, heating and air-conditioning company in London
DIAMOND PLUMBERS LIMITED is an active limited company (no. 12652586), incorporated in 2020, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in NW9 (London), and 1,956 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
1,956 similar companies within 10 km. London
What homes around NW9 need
In NW9 last summer (2026) there were ≈12 nights that stayed above 18 °C — 8 times the 1991–2020 average of 1.6 (ERA5 reanalysis, grid ≈30 km, lower than street temperatures in cities).
4% of sampled postcodes in NW9 sit in a conservation area (on-record, 1,479 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 |
|---|---|---|---|
| TIMMS PROPERTY MAINTENANCE & MANAGEMENT LTD | 13259666 | NW9 | ≈0.2 km |
| NEXGEN ENERGY SOLUTIONS LTD | 16335408 | NW9 | ≈0.2 km |
| KAY'S WORKSHOP LTD | 12024653 | NW9 | ≈0.2 km |
| FIRST CALL EMERGENCY 247 LTD | 14441339 | NW4 | ≈0.3 km |
| S&M TOP LTD | 09606894 | NW9 | ≈0.4 km |
| PLUMBING & HEATING NETWORK LTD | 17121234 | NW9 | ≈0.5 km |
| BS GAS AND HEATING LTD | 06220262 | NW4 | ≈0.5 km |
| MARSH PLUMBING & HEATING SUPPLIES LTD | 16175179 | NW4 | ≈0.5 km |
| LUNAR WAT£R LTD | 16842631 | NW4 | ≈0.6 km |
| ECO AIRCON LTD | 08387088 | NW4 | ≈0.6 km |
Company record
| Field | Value |
|---|---|
| Company number | 12652586 |
| Name | DIAMOND PLUMBERS LIMITED |
| Status | Active |
| Incorporated | 8 Jun 2020 |
| SIC | 43220 · plumbing, heat and air-conditioning installation |
| Registered office postcode | NW9 5XX |
| Outcode | NW9 |
| 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 12652586 |
Companies House record: DIAMOND PLUMBERS LIMITED, company 12652586, 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.