In most cases, you do not need planning permission to install solar panels on your home in the UK. For typical houses in places like Horley, Reigate, Redhill, Crawley, and across Surrey and West Sussex, solar is usually allowed under “permitted development”, which means it can be installed without a formal planning application.
This guide explains when planning permission is not required, when it is, and what checks you should make before going ahead.
We will cover:
- What “permitted development” means
- When solar panels do not need planning permission
- When you do need permission
- Rules for listed buildings and conservation areas
- Requirements for commercial properties
- What approvals or paperwork are still needed
- What installation involves
- Common mistakes to avoid
- Practical steps before you proceed
What does permitted development mean?
Permitted development means you can carry out certain types of work without applying for planning permission, as long as you follow specific rules.
For solar panels, this generally applies to:
- Roof-mounted systems on houses
- Some ground-mounted systems within limits
What this means for you is that most standard domestic installations can go ahead without delays from the planning process, provided the system is designed correctly.
When do solar panels NOT need planning permission?
Most homeowners do not need planning permission if their system meets standard conditions.
These include:
- Panels are fitted on the roof, not sticking out excessively
- They do not rise more than 200mm above the roof surface
- They are not installed above the highest part of the roof (the ridge)
- The system is sited to minimise visual impact where possible
In a typical semi-detached house in Crawley or a detached home in Reigate, this is usually straightforward.
As long as these rules are followed, installation can often proceed without a planning application.
When DO you need planning permission?
You may need planning permission if your installation falls outside permitted development rules.
Common situations include:
- Panels installed on a flat roof with frames that make them more visible
- Ground-mounted systems that are large or close to boundaries
- Installations on outbuildings in prominent locations
- Systems that exceed size or projection limits
For example, a large ground array in a garden in Redhill may need approval depending on its size and visibility.
If there is any doubt, it is worth checking before work starts.
What if your property is in a conservation area?
You can still install solar panels in a conservation area, but the rules are stricter.
Typically:
- Panels should not be installed on a roof that faces the road
- Visual impact is considered more carefully
In areas of Surrey and West Sussex with conservation status, this is a common situation.
You may still be able to install panels on rear-facing roofs without permission, but each property is different.
What about listed buildings?
If your property is listed, you will almost certainly need listed building consent.
This applies even if:
- The panels are on the rear of the property
- They are not visible from the street
Listed building consent is separate from planning permission and focuses on protecting the building’s character.
If you own a listed property in Horley or nearby areas, this is a key step that cannot be skipped.
Do landlords or businesses need planning permission?
The same general rules apply, but with a few differences.
For rental properties and small businesses:
- Roof-mounted solar often falls under permitted development
- Larger systems may require planning permission
For commercial buildings:
- System size and visibility are more likely to trigger planning requirements
- Flat roofs with angled frames may need approval
For example, a small business unit in Crawley installing a large array for daytime energy use may need to go through planning.
What other approvals are required?
Even if planning permission is not needed, other approvals may still apply.
These include:
– DNO approval
This means notifying or getting approval from your local electricity network operator. It ensures the grid can handle your system exporting electricity.
– Building regulations compliance
This covers structural safety and electrical standards.
– MCS certification
This is a quality standard for renewable installations. It is required if you want to receive payments under schemes like SEG (Smart Export Guarantee, which pays you for exporting electricity).
JPEC Green Energy regularly manages these steps for customers across Reigate, Redhill, and the wider Surrey and West Sussex area, making sure everything is compliant and clearly explained.
What does installation involve?
Solar panel installation is usually straightforward and completed in one to three days for a typical home.
The process generally includes:
- Scaffolding setup
- Mounting panels to the roof structure
- Installing an inverter (this converts solar electricity into usable power)
- Connecting to your consumer unit (fuse board)
- Testing and commissioning
Disruption is usually minimal, but access to your loft and electrics will be needed.
What factors affect whether permission is needed?
Several practical factors can affect your situation.
These include:
- Roof orientation and visibility
- Height and angle of the panels
- Proximity to neighbours or boundaries
- Whether your property has special status (listed or conservation area)
For example, a rear-facing roof in Horley may be straightforward, while a prominent street-facing roof in a conservation area in Reigate may need more consideration.
Common mistakes and how to avoid them
Many issues arise from assumptions rather than checking the details.
Common mistakes include:
- Assuming all properties are treated the same
- Not checking conservation area restrictions
- Installing before confirming permissions where required
- Using non-compliant installers or equipment
The safest approach is to confirm your status early and work with an experienced installer.
Practical steps before you go ahead
Before committing to solar panels, take a few simple steps:
- Check if your property is listed or in a conservation area
- Look at your roof from the street to assess visibility
- Speak to a qualified installer for an initial assessment
- Confirm whether planning permission is required
A professional survey will give you a clear answer based on your exact property.
JPEC Green Energy can assess your home or business in Horley, Crawley, Reigate, or Redhill and explain whether planning permission is needed, along with expected performance and any trade-offs.
Is it still worth it if permission is required?
Yes, but it may take longer and involve extra cost.
Planning permission:
- Adds time to the project
- May involve design adjustments
- Does not usually prevent installation altogether
In many cases, systems can be adapted to meet planning requirements while still delivering strong performance.
JPEC Green Energy can help
If you are unsure whether you need planning permission for solar panels, JPEC Green Energy can guide you through the process from start to finish.
They work across Horley, Reigate, Redhill, Crawley, and the wider Surrey and West Sussex area, providing surveys, system design, installation, and commissioning. They can also advise on planning requirements, handle approvals, and explain everything in plain English so you know exactly what to expect.
To get started, contact JPEC Green Energy to arrange a survey or discuss your options.
This guide is for general information only and does not constitute personal advice. Requirements can vary depending on your property, location, and system design. Always confirm details through a professional survey before proceeding.
