By the PPA Funding team Last updated
Rooftop solar is the usual choice for businesses because it uses space you already have and puts generation right where the power is used. Ground-mounted solar suits sites with limited or unsuitable roofs but spare land, and can host larger arrays — though it needs the land and often planning permission.
Rooftop vs ground-mounted solar at a glance
| Consideration | Rooftop solar | Ground-mounted solar |
|---|---|---|
| Space used | Existing roof space — no land needed | Spare land or a field on your site |
| Planning | Often permitted development | Usually needs planning permission |
| Cost per kWp | Lower — no groundworks or frames | Higher — frames, groundworks and fencing |
| Main survey check | The roof must carry the extra load | Ground conditions and access instead |
| Scale | Limited by usable roof area | Can be much larger where land allows |
| Best for | Most warehouses, factories and units | Sites with land but small or unsuitable roofs |
Rooftop solar
Mounting panels on your existing roof uses otherwise dead space, keeps generation close to your demand, and often falls under permitted development. For most commercial buildings with a sound, reasonably unshaded roof, it is the simplest and most cost-effective option.
Ground-mounted solar
Where a roof is small, shaded or structurally unsuitable, a ground-mounted array on spare land can work — and can be scaled larger than a roof allows. It typically needs available land, usually requires planning permission, and involves groundworks, so suitability depends on the site.
Which is right for you
If you have a good roof, start there. If your roof is limited but you have land, ground-mount is worth exploring. Some sites combine both. We assess your roof, land, demand and connection to recommend the best mix.
This guide is general information, not financial or tax advice. Your circumstances determine what applies — please confirm with your accountant or advisor. Get a tailored proposal →
Frequently asked questions
Is ground-mounted solar more expensive?
It involves groundworks and usually planning, so the balance of costs differs from rooftop, but it can host larger systems. The right choice depends on your site — we compare the options for you.
Can I have both roof and ground-mounted solar?
Yes, some sites use both to maximise generation. We design around your roof, available land, demand and grid connection.
Related guides
- Solar vs wind for business energy
- Fixed vs index-linked PPA rates explained
- Commercial solar warranties and insurance explained
See our funding options, commercial solar and solar by industry pages.