This is general guidance based on standard permitted development rights in England. Rules differ for listed buildings, conservation areas, and properties with Article 4 directions. Always confirm with your local planning authority before starting work.
Do I Need Planning Permission for Solar Panels in South Downs National Park?
Installing solar photovoltaic (PV) panels or solar thermal panels on your roof or within your property's grounds. Solar panels have specific permitted development rights under Part 14 of the GPDO.
Planning in South Downs National Park
92%
of planning applications granted
85%
decided within the statutory or agreed time
41%
of householder applications decided within 8 weeks
In the year to December 2025, South Downs National Park decided 1,656 planning applications. 810 of these were householder projects such as extensions, loft conversions and outbuildings, of which 94% were granted.
Planning statistics: MHCLG planning application statistics, the year to December 2025. Conservation area and Article 4 data: planning.data.gov.uk, © Historic England / Crown copyright. Open Government Licence v3.0.
Important: Additional Restrictions May Apply in South Downs National Park
South Downs National Park has 127 conservation areas. These include Abbots Worthy, Alciston, Alfriston, Arundel, Avington, Bepton. If your property is in a conservation area, some or all permitted development rights may be restricted. For example, you may need planning permission for changes that would normally be permitted, including alterations to the roof, cladding, or extensions visible from a public highway.
South Downs National Park has Article 4 directions in force. Article 4 directions remove specific permitted development rights in defined areas. If your property is covered by an Article 4 direction, you may need planning permission for work that would normally be permitted. Contact South Downs National Park planning department to check whether an Article 4 direction applies to your property.
Check with South Downs National Park planning department before starting work to confirm whether your property is affected by any special designations.
Permitted Development Rules for Solar Panels
Generally permitted under Part 14, Class A (roof-mounted) of the GPDO. Solar panels on a roof are PD provided they do not protrude more than 200mm beyond the roof plane and do not exceed the highest part of the roof (excluding the chimney). Standalone panels in the garden are PD under Part 14, Class B with additional conditions.
Conditions
- 1Must not protrude more than 200mm beyond the roof plane
- 2Must not be higher than the highest part of the roof (excluding the chimney)
- 3Must not be installed on a wall or roof slope forming the principal elevation and fronting a highway (in designated areas)
- 4Panels must be removed when no longer needed for energy generation
- 5Standalone ground-mounted panels: must not face a highway and must not exceed 4m in height or 9 square metres in area
Size and Dimension Limits
- Roof-mounted: must not protrude more than 200mm from roof plane
- Must not exceed highest part of roof (excluding chimney)
- Ground-mounted: maximum 4m height, 9 square metres area
When Permitted Development Does Not Apply
- Listed buildings require listed building consent
- In conservation areas, AONB, National Parks, etc., panels on principal or highway-facing elevations are not PD
- Standalone panels must not be within 5m of the boundary of the curtilage in designated areas
- Flat roof installations must not exceed 1m above the highest point of the flat roof
What About Building Regulations?
Building regulations approval is not usually required
Building Regulations do not normally apply to solar panel installation on an existing roof, provided the roof structure can support the additional load. If structural alterations to the roof are needed, Building Regulations may apply. Electrical work must comply with Part P and should be carried out by an MCS-certified installer to qualify for Smart Export Guarantee (SEG) payments.
Building regulations are separate from planning permission. Even if your project is permitted development, you may still need building regulations approval. Contact South Downs National Park building control or use an approved inspector.
How to Apply in South Downs National Park
If you need planning permission for your solar panels, you can apply through South Downs National Park's planning department or via the national Planning Portal.
If your project is permitted development and you want written confirmation, you can apply for a Lawful Development Certificate (LDC) from South Downs National Park. This provides proof that your project does not need planning permission, which can be helpful when selling your property.
What Happens If I Build Without Permission?
Low risk for standard roof-mounted panels on non-listed, non-designated-area properties. In conservation areas or on listed buildings, enforcement can require removal of panels installed without consent.
Frequently Asked Questions
Do I need planning permission for solar panels in South Downs National Park?
Does solar panels in South Downs National Park need building regulations?
How do I apply for planning permission in South Downs National Park?
How long does planning permission take in South Downs National Park?
What percentage of planning applications does South Downs National Park approve?
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