Harleston: plumbing, heating and air-conditioning companies
Harleston has 6 plumbing, heating and air-conditioning companies (SIC 43220) and 13 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 IP20, summer 2026 had ≈7 nights above 18 °C there (4 times the 1991–2020 average of 1.7).
SIC 43220
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FURLONG CONSTRUCTION AND PLUMBING SERVICES LTD, incorporated 2023, status Active.
Plumbing, heating and air-conditioning companies
| Company | Incorporated | Status | District |
|---|---|---|---|
| FURLONG CONSTRUCTION AND PLUMBING SERVICES LTD | 2023 | Active | IP20 |
| HUNT HEATING AND PLUMBING LTD | 2024 | Active | IP20 |
| PAUL SHELLEY PLUMBING & HEATING LTD | 2012 | Active | IP20 |
| THERMOTECH PLUMBING & HEATING LTD | 2026 | Active | IP20 |
| PREM E AIR LTD | 2025 | Active | IP20 |
| STOCKWELL PLUMBING & HEATING LIMITED | 2023 | Active | IP20 |
Electrical and other installation companies
| Company | SIC | Incorporated | Status | District |
|---|---|---|---|---|
| H REEVES ELECTRICAL LTD | 43210 · electrical installation | 2024 | Active | IP20 |
| G DUNN ELECTRICAL LIMITED | 43210 · electrical installation | 2019 | Active | IP20 |
| GRB ENERGY LTD | 43210 · electrical installation; 43290 · other construction installation | 2025 | Active | IP20 |
| NORFOLK & SUFFOLK ELECTRICIANS LTD | 43210 · electrical installation | 2006 | Active | IP20 |
| OULTON ELECTRICAL LIMITED | 43210 · electrical installation | 2015 | Active | IP20 |
| POCHIN ELECTRICAL SERVICES LTD | 43210 · electrical installation | 2024 | Active | IP20 |
| SB ELECTRICAL (EAST ANGLIA) LIMITED | 43210 · electrical installation | 2023 | Active | IP20 |
| THEGROUNDWORKSCO. LTD | 43290 · other construction installation; 41201; 41202; 42220 | 2023 | Active | IP20 |
| SJ & L MARJORAM LIMITED | 43210 · electrical installation; 69201 | 2009 | Active | IP20 |
| ABSOLUTE MECHANICAL LTD | 43290 · other construction installation | 2007 | Active | IP20 |
| JRA INSTALLATIONS LIMITED | 43210 · electrical installation | 2009 | Active | IP20 |
| EASTERN DEMOLITION LIMITED | 43290 · other construction installation; 43110; 43120; 43910 | 2020 | Active | IP20 |
| SJB ELECTRICAL SERVICES LIMITED | 43210 · electrical installation; 33140 | 2020 | Active | IP20 |
Heat and planning around Harleston
In Harleston last summer (2026) there were ≈7 nights that stayed above 18 °C — 4 times the 1991–2020 average of 1.7 (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.
15% of sampled postcodes in Harleston sit in a conservation area (323 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.