Solar panels for commercial buildings in the UK
Almost any commercial building can host solar, but the right answer differs by building type, tenure and roof. This guide covers which buildings suit rooftop solar, the carport and ground-mount alternatives, and the checks that decide whether a specific building stacks up.
How different commercial buildings suit solar
Warehouses and distribution sheds
The strongest candidates in UK commercial property: large, unobstructed roofs, high daytime load and simple access. A 40,000 sq ft roof commonly supports 250-400 kWp.
Factories and manufacturing units
Continuous process loads make self-consumption high, which is what drives payback. Roof condition and crane access for maintenance need checking early.
Offices
Smaller roofs relative to consumption, but strong daytime occupancy and an EPC uplift that matters for MEES compliance and lettability. Multi-let buildings need a landlord-led structure.
Retail and supermarkets
Long trading hours and refrigeration loads give steady daytime demand. Portfolio rollouts across a store estate spread design and procurement costs.
Schools, colleges and public buildings
Excellent daytime weekday load and long-term occupation. Funding routes differ from the private sector, with capital, CIF and PPA structures all in use.
Leisure, hotels and care settings
Seven-day operation and high hot-water and HVAC demand give strong self-consumption. Guest and resident experience shapes where panels and scaffolding can go.
Roof, car park or land: where the panels go
Rooftop (the default)
Lowest cost per kWp, no land take, and most English rooftop arrays fall under permitted development. The roof needs enough remaining life to avoid lifting the array for re-roofing later.
Solar carports
Turn existing car parks into generation, with EV charging and weather protection as added benefits. Higher cost per kWp than rooftop, but no roof-condition risk and a visible sustainability statement.
Ground-mounted
Suits businesses with adjacent land. More planning involvement than rooftop, but easy access for cleaning and maintenance, and orientations can be optimised rather than inherited from the building.
Leased buildings and landlords
A large share of UK commercial floor space is leased, and solar is still entirely possible. The questions to settle early are who owns the array, who benefits from the generation, and what happens at lease end.
- Tenant-led with consent. The tenant funds the array under a licence to alter, takes the savings, and agrees reinstatement or transfer terms at lease end.
- Landlord-led. The landlord funds the array and sells power to tenants, or recovers the cost through the service charge. This suits multi-let buildings.
- PPA structures. A third party funds and owns the array on the landlord's roof; the occupier buys the power at a rate below their import price.
More detail: solar for commercial landlords and solar on a leased building.
The checks that decide whether a building stacks up
- Structural capacity. A surveyor confirms the roof can carry the array's dead and wind loads. Non-negotiable on any commercial roof.
- Remaining roof life. Re-roofing under a live array means lifting and refitting it. If the covering has under ten years left, sequence the works together.
- Shading and orientation. Nearby plant, parapets and trees move yield more than panel brand. South-facing is ideal, but east-west arrays often match business hours better.
- Grid headroom. The DNO application establishes export capacity. An export limit reduces earnings on surplus power but rarely changes the savings case.
- Consumption match. Twelve months of half-hourly data shows how much generation the building will actually use, which is what decides payback.
What to read next
Frequently asked questions
Can solar panels be installed on any commercial building?
Most can, but the roof needs enough remaining life, structural capacity and unshaded area to make it worthwhile. A structural survey and a generation model from your half-hourly data answer the question definitively before any money is committed.
Can I install solar panels on a leased commercial building?
Yes, with the landlord's consent. The lease, any licence to alter, and who benefits from the generation all need agreeing up front. Landlord-owned structures and PPAs are common solutions, and our commercial landlords page sets out the options.
Do solar panels on commercial buildings need planning permission?
Most rooftop arrays in England are permitted development. Listed buildings, conservation areas, some scale thresholds and ground-mounted schemes are the main exceptions, so a site-specific check is worth doing at feasibility stage.
How much roof space does a commercial building need for solar?
Allow roughly 6-8 m² of usable roof per kWp once walkways, plant, rooflights and set-backs are deducted. Usable area is usually 50-70% of gross roof area on a typical commercial building.
What if my commercial building's roof is not suitable?
Carports and ground-mounted arrays are the usual alternatives, and a facade system is occasionally viable. If on-site generation is genuinely constrained, a corporate PPA can still deliver renewable electricity without panels on your building.
Do solar panels affect a commercial building's insurance or value?
Insurers generally accept properly specified systems, though they expect accredited design and fire-safety compliance. On value, solar typically lifts EPC ratings, which supports lettability under MEES and can support the capital value of the asset.
Read next
Related guides & sector pages
Can I put solar panels on my roof?
Structural, planning and roof suitability checklist.
Read GuideNet Zero roadmap for UK businesses
Six-step SBTi-aligned plan with solar first.
Read GuideAre commercial solar panels worth it?
The 2026 UK business case - payback, IRR and risk.
Read SectorCommercial landlords
Multi-let estates and landlord PPAs.
ReadCheck where solar fits your commercial building
Tell us about the building, roof, tenure and available land or parking. We will assess the most credible location for solar and flag the structural, landlord and grid checks needed next. Prefer to explore numbers yourself first? Run the calculator or contact us directly.
- Roof, carport and land options considered
- Leasehold and landlord issues flagged
- Next surveys and approvals outlined