Why farm workshop solar makes economic sense around Cardiff
The farms around Cardiff run from Vale of Glamorgan dairy and mixed arable to upland sheep and beef in the valleys and the Brecon Beacons. The region's working farms — many tenanted from institutional landlords like Welsh Government rural estate plus National Trust Wales — typically run multi-building holdings with significant on-farm electrical demand. Farm Workshop installations near Cardiff benefit from year-round daytime baseload that aligns well with PV generation: Welder, compressor, machine-shop loads spike during day — good PV match. What a particular building would save depends on its half-hourly electricity use, the tariff it pays and its export arrangement, so the figures come from the farm’s own bills rather than an area average; the farm solar cost guide shows how to build that estimate from the official DESNZ figures.
Typical farm workshop install specification for the Cardiff region
A representative farm workshop install for a working farm near Cardiff delivers around 20 kW of capacity across roughly 120 square metres of roof area. Class J, Part 14 GPDO permitted development. Workshop electrical certification (BS 7671) coordinated with PV inverter integration. Diesel storage/COMAH-lite considerations for any pipework routing.
Indicative farm workshop install around Cardiff
- System size range
- 20–150 kW
- Panel count
- 37–275
- Roof area needed
- 120–900 sqm
- Annual generation
- 18,000–138,000 kWh (modelled)
Cardiff-area planning and grid context
Farm Workshop solar installations near Cardiff fall under the Welsh order, not the English one: Part 43 Class A of the Town and Country Planning (General Permitted Development) Order 1995 as it applies in Wales, subject to its conditions. The Wales section of planning permission for solar on farm buildings. The distribution network operator (DNO) is the company that owns the local network, set by the site’s location rather than the electricity supplier. It sets its own G99 study timescales and any reinforcement cost, so ask it for current figures in writing before relying on a programme; the process is covered in the guide to DNO grid connection for rural farm solar.
Farm Workshop solar in Cardiff — key features
- Welder, compressor, machine-shop loads spike during day — good PV match
- Machinery storage barns often have simple steel-portal frames ideal for retrofit
- Often the lowest-disruption install on a working farm — no livestock biosecurity
- Frequently paired with EV charging for farm fleet electrification
Combined re-roof and PV for older Cardiff-area farm workshop buildings
Many buildings of this age carry asbestos cement sheets. Installers will not normally fix through them, so the roof is overclad or replaced before the panels go on. HSE says most work on asbestos cement is non-licensed provided the people doing it are informed, instructed and trained, and its task sheet A14 asks whether the sheets can be overlaid with non-asbestos material instead of removed. The options and what to ask for are in overclad or strip an asbestos cement farm roof, and the legal position is on solar panels on asbestos cement farm roofs.
What a feasibility study should cover for farm workshop solar in Cardiff
A project normally starts with a desk-based feasibility study from half-hourly meter data and building dimensions, which should give an indicative system size, generation forecast and self-consumption ratio before anyone visits. Ask each installer what the study includes, what it costs, who carries it out and what the structural and electrical survey covers. This site is independent guidance, not an installer: send your details through the quote form and we reply by email.
See more detail on our farm workshop solar page or our wider Cardiff farm-building solar coverage.
Nearby cities — farm workshop solar
Nearby cities with a farm workshop solar page:
For the full UK coverage map, see all farm workshop solar installations or browse every location page.
Frequently asked questions
How much does a farm workshop solar install cost in Cardiff?
There is no single price for an install of this kind. The official DESNZ series for 2025/26 gives a mean installed cost of £1,266.84 per kW for 10–50 kW systems (£1,167.29 for non-domestic installations in that band), but it covers MCS installations up to 50 kW across all building types, so larger farm systems are priced from written quotes. The farm solar cost guide sets out the series and what moves a farm quote.
How long does a farm workshop install take in Cardiff?
The programme depends on the grid connection study, the structural survey and whether the roof needs work first, so ask each installer for a written programme that names those dependencies. No area-wide timescale is published for this page.
What grants are available for Cardiff-area farm solar?
No scheme specific to this area is claimed here. The current national position on capital allowances, the Smart Export Guarantee and open schemes is on the grants and funding guide, which is checked against primary sources.
Do I need planning permission for farm workshop solar in Cardiff?
Cardiff is in Wales, so the English Class J rules do not apply. Rooftop solar on a non-domestic building is permitted development under Part 43 Class A of the Welsh General Permitted Development Order, subject to its conditions: no more than 20 cm proud of a wall or pitched roof, 1 m above a flat roof, at least 1 m from the roof edge, not within the curtilage of a listed building and not within 3 km of an aerodrome. A stand-alone yard array is limited to 9 m² under Class B.
Can we install solar on asbestos cement roofs near Cardiff?
Not directly: installers will not normally fix through asbestos cement sheets, so the roof is replaced or overclad first. HSE says most work on asbestos cement is non-licensed provided the people doing it are informed, instructed and trained, and its task sheet A14 asks whether the sheets can be overlaid with non-asbestos material instead of removed. The options are set out in the guide to overcladding or stripping an asbestos cement farm roof.
How long does a G99 grid connection take?
The distribution network operator (DNO) is the company that owns the local network, set by the site’s location rather than the electricity supplier. It sets its own G99 study timescales and any reinforcement cost, so ask it for current figures in writing before relying on a programme; the process is covered in the guide to DNO grid connection for rural farm solar.