Mill Hill: plumbing, heating and air-conditioning companies
Mill Hill has 1 plumbing, heating and air-conditioning companies (SIC 43220) and 1 electrical and other installation companies registered here (Companies House, 1 Sep 2026); 0 are MCS-certified for air-to-air yet. If the office is in NW7, summer 2026 had ≈12 nights above 18 °C there (8 times the 1991–2020 average of 1.6).
SIC 43220
Open a company
HAMILTON AIR CONDITIONING LTD, incorporated 2011, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| HAMILTON AIR CONDITIONING LTD | 2011 | Active | NW7 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| TOWN & COUNTRY RESTORATIONS LIMITED | 43290 · other construction installation | 2021 | Active | NW7 |
Nearest plumbing companies within 25 km
9,331 plumbing companies (SIC 43220) have a registered office within 25 km. The nearest 10 are listed.
| Company | Number | District | Distance |
|---|---|---|---|
| D.S.W. TECHNICAL SERVICES LIMITED | 01143546 | NW7 | ≈0.1 km |
| LONDON ELECTRICIAN 24/7 LIMITED | 08292061 | NW7 | ≈0.1 km |
| MC PLUMBING & HEATING LIMITED | 08421955 | NW7 | ≈0.1 km |
| GAS MECHANICAL SERVICES LIMITED | 11045006 | NW7 | ≈0.1 km |
| EMERGENCY ELECTRICS & HEATING 24/7 LIMITED | 12660951 | NW7 | ≈0.1 km |
| HEATING AND AIR CONDITIONING LTD | 09454560 | NW7 | ≈0.1 km |
| CLEAN AIR ZONE AIR CONDITIONING LTD | 11480505 | NW7 | ≈0.1 km |
| REGAL HEATING AND PLUMBING LIMITED | 08216986 | HA8 | ≈0.3 km |
| G.A.D PLUMBING AND HEATING LTD | 09400689 | HA8 | ≈0.3 km |
| MOORE & SONS HEATING AND PLUMBING LIMITED | 13657594 | HA8 | ≈0.4 km |
Heat and planning around Mill Hill
In Mill Hill 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). The figure is the household-weighted mean of 1 postcode districts where these offices are registered.
12% of sampled postcodes in Mill Hill sit in a conservation area (800 live postcodes across 1 districts).
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).
Companies House snapshot 1 Sep 2026, 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. Hot nights: ERA5-ARCO, June–August, minimum at or above 18 °C, household-weighted across the districts where these offices are registered, retrieved 25 Sep 2026. Conservation-area share: sampled postcode points, snapshot 25 Sep 2026. Distances are an equirectangular approximation to 0.1 km.
Better than a town directory that only lists names: each plumbing company links to its Companies House record and the local hot-night count.