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Technical6 min read
Planning Permission for Commercial Solar: What You Need to Know
Most commercial roof-mounted solar does not need planning permission, but there are important exceptions. Learn the rules and when to seek advice.
Solar Panels For Businesses Team
12 November 2025
Permitted Development Rights
Most commercial solar installations benefit from permitted development rights, meaning no planning application is required. However, specific conditions must be met.
When Permission is NOT Needed
- Roof-mounted systems on commercial buildings
- Panels do not protrude more than 200mm from roof surface
- Panels do not extend above highest part of roof
- Building is not in a conservation area
- Building is not listed
When Permission IS Required
- Listed buildings (all installations)
- Conservation areas (may need application)
- Ground-mounted systems (usually required)
- World Heritage Sites
- National Parks and AONBs (may vary)
Planning Application Process
| Stage | Typical Timeline |
|---|---|
| Pre-application advice | 2-4 weeks |
| Application submission | 1 week |
| Validation | 1-2 weeks |
| Consultation period | 3 weeks |
| Decision | 8 weeks (minor) |
Tips for Success
- Engage early with planning department
- Consider visual impact from public viewpoints
- Use heritage-sensitive panel colours if needed
- Provide clear technical documentation