Southwell: plumbing, heating and air-conditioning companies
Southwell has 2 plumbing, heating and air-conditioning companies (SIC 43220) and 7 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 NG25, summer 2026 had ≈6 nights above 18 °C there (6 times the 1991–2020 average of 0.9).
SIC 43220
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GREEN SOURCE HEATING LIMITED, incorporated 2020, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| LIME ARNOLD GROUP LIMITED | 2019 | Active | NG25 |
| GREEN SOURCE HEATING LIMITED | 2020 | Active | NG25 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| MLM CONSULT LTD | 43210 · electrical installation | 2007 | Active | NG25 |
| JONATHAN ENSOR ELECTRICAL SOLUTIONS LTD | 43210 · electrical installation | 1987 | Active | NG25 |
| SCOPE M&E LTD | 43210 · electrical installation; 68209 | 2016 | Active | NG25 |
| GOLLICK ELECTRICAL LTD | 43210 · electrical installation; 71200 | 2022 | Active | NG25 |
| JAMES ALLEN INTERIORS LTD | 43290 · other construction installation; 43999 | 2019 | Active | NG25 |
| K H ELECTRICAL (SOUTHWELL) LIMITED | 43210 · electrical installation | 2017 | Active - Proposal to Strike off | NG25 |
| FLOODBOARD LIMITED | 43290 · other construction installation | 2024 | Active - Proposal to Strike off | NG25 |
Heat and planning around Southwell
In Southwell last summer (2026) there were ≈6 nights that stayed above 18 °C — 6 times the 1991–2020 average of 0.9 (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.
32% of sampled postcodes in Southwell sit in a conservation area (290 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.