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MCCARTHY PLUMBING AND HEATING LTD: plumbing, heating and air-conditioning company in Harrow
MCCARTHY PLUMBING AND HEATING LTD is an active limited company (no. 13848014), incorporated in 2022, registered for plumbing, heating and air-conditioning installation (SIC 43220), with its registered office in HA3 (Harrow), and 1,886 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
1,886 similar companies within 10 km. Harrow
What homes around HA3 need
In HA3 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 HA3 sit in a conservation area (on-record, 1,261 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 |
|---|---|---|---|
| DELTA ENGINEERS LTD | 11755353 | HA3 | under 0.1 km |
| HAWK ENERGY HUB LTD | 16315963 | HA3 | ≈0.1 km |
| ACC MECHANICAL LTD | 12048998 | HA3 | ≈0.1 km |
| GAS SAFE SERVICE LTD | 08064215 | HA3 | ≈0.3 km |
| HEATPUMPS HUB LIMITED | 09110449 | HA3 | ≈0.4 km |
| VIESSMANN ENGINEER LIMITED | 10733989 | HA3 | ≈0.4 km |
| VAILLANT ENGINEER LIMITED | 11862185 | HA3 | ≈0.4 km |
| MCPH LIMITED | 12596329 | HA3 | ≈0.4 km |
| BGA-WELD PIPE SYSTEMS LIMITED | 14367311 | HA3 | ≈0.4 km |
| WORK OF ART SERVICES LTD | 15416710 | HA3 | ≈0.4 km |
Company record
| Field | Value |
|---|---|
| Company number | 13848014 |
| Name | MCCARTHY PLUMBING AND HEATING LTD |
| Status | Active |
| Incorporated | 13 Jan 2022 |
| SIC | 43220 · plumbing, heat and air-conditioning installation |
| Registered office postcode | HA3 8DD |
| Outcode | HA3 |
| 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 13848014 |
Companies House record: MCCARTHY PLUMBING AND HEATING LTD, company 13848014, 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.