Commercial building solar panels in Cwmbrân
For a landlord in Cwmbrân, a roof array is increasingly a question about the EPC rating as much as the electricity bill. The survey starts with the membrane and the deck: how many years the covering has left, what the roof can carry in ballast, and where plant and its shade rule panels out.
903 kWh per kWp a year at this latitude, so a 210 kWp array models at about 190,000 kWh. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
Book a roof survey in CwmbrânIllustrative layout for a flat commercial roof of this size, with plant, shade and access kept clear. Your own figures come from the roof survey.
- 47,090
- people in the Cwmbrân built-up area (ONS Census 2021)
- 600
- office properties on the rating list in Torfaen (VOA, March 2025)
- 700
- retail properties, 20 of them large-format (VOA, March 2025)
- 0
- named commercial rooftop schemes on the planning record nearby (REPD, Q1 2026)
Solar for offices and retail across Newport
How much sun a Cwmbrân roof gets
Modelled irradiation here is 1,159 kWh per square metre a year on a low-tilt array, which works out at 903 kWh for every kWp installed (EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss). That is within a few percent of the mean across the towns we cover, so the weather is not what decides the case here. Opening hours are.
The rating list for Torfaen
The Valuation Office Agency's rating list puts 600 office and 700 retail properties in Torfaen, covering about 85,000 and 126,000 square metres of floorspace respectively. By office stock the district sits in the bottom quarter of the 318 districts in England and Wales; by retail stock it sits in the bottom quarter of the 318 districts in England and Wales.
20 of those retail properties are superstores, large food stores, large shops or retail warehouses, together about 36,000 square metres. Single storey boxes of that size are where most commercial rooftop solar actually gets built, because the roof is big, flat or shallow, and uninterrupted.
The same list carries 120 hotel, leisure and assembly properties in the district. Leisure centres and hotels run seven days a week, which puts weekend generation to use that an office would export.
Source: Valuation Office Agency, Non-domestic rating: business floorspace, 31 March 2025 (published December 2025), counts and floorspace by special category code and local authority district, England and Wales.
The built-up area holds about 47,090 people, so the stock here runs to high street premises, a supermarket or two and the odd hotel (ONS Census 2021 built-up areas).
Surveys run across NP postcodes, NP44 outward.
Cwmbrân ranks 3 of 4 towns we cover in Newport on modelled yield, against a national mean of 886 kWh per kWp. The county runs from 887 to 910, a spread of 23 kWh per kWp. Within Newport that difference is small enough to ignore: where the building sits is not what decides this scheme, your consumption pattern is.
All solar on record near NP44
Every scheme in this postcode district in the government's Renewable Energy Planning Database, Q1 2026, ground and roof mounted, commercial or not. None of them is ours. Together they are a fair guide to how the local network has been treating export applications.
| Scheme | Operator | Capacity | Mounting | Status |
|---|---|---|---|---|
| Cwrt Henllys Farm | Lightsource Renewable Energy | 5 MW | Ground | Operational |
| Ty Coch Hollybush Way | Torfaen CBC | 3 MW | Ground | Awaiting Construction |
| EFG Food And Technology Park | Eurofoods UK | 0.5 MW | Roof | Awaiting Construction |
| Pentre Bach Solar Farm | Elgin Energy EsCo Ltd | 20 MW | Ground | Application Submitted |
| The Grange University Hospital, Caerleon Road - Solar Car Ports | Vital Energi Utilities Ltd | 0.72 MW | Ground | Awaiting Construction |
Send us the postcode
Tell us where the building is, roughly how big the roof is, and whether you own it or lease it. We come back with what it can carry, what it would generate against your consumption, and the three ways to pay for it.
Lenzie Consulting Ltd arranges the survey and passes your details to our MCS-certified installation partner so they can quote.
Questions about solar in Cwmbrân
- Is there enough sun in Cwmbrân for a commercial roof array?
- Modelled at 903 kWh per kWp a year for a low-tilt array at this latitude, a 210 kWp system comes out at roughly 190,000 kWh a year before shading. It needs about 1,390 m² of flat roof once the edge strip, plant and walkways are kept clear. Source: EU PVGIS v5.2, SARAH3, 10 degree pitch, 14 percent system loss.
- Is planning permission needed for panels on a Cwmbrân office or shop?
- Wales has its own permitted development rules for non-domestic roofs (Part 43 of the Welsh GPDO). Since April 2019 there is no output limit and no prior approval step, but the right does not apply within 3 km of an airport or aerodrome, on a wall or roof slope fronting a highway in a conservation area, National Park, AONB or World Heritage Site, or on a listed building or its curtilage. On a flat roof panels may stand no more than 1 metre above the roof and must sit at least 1 metre from its edge. We confirm the route with Torfaen before the design is fixed.
- Will rooftop solar improve the EPC rating of a let building in Cwmbrân?
- It can. A non-domestic EPC is an asset rating, and on-site generation counts in the calculation, so an array usually lifts the score. Let property in England and Wales must be EPC E or better today. The government's interim response of 18 June 2026 proposes EPC B, where cost effective, from 2031 for let buildings over 1,000 m², and drops the EPC C step once planned for 2027. How far solar moves a particular building depends on its fabric and services, which is why the EPC assessor models it before anything is fitted.