A question we’re often asked is ‘Do you need planning permission for solar panels?’ And usually it’s a straightforward answer: for most residential properties, you will not need planning permission to install solar panels.

But uncertainty about this can deter people from even getting a quote. The prospect of additional costs, lengthy waits and administrative hassle can seem daunting, so let’s shed some light on planning permission and when you might have to get it in order to install solar at your home.

Solar panels = permitted development

In most cases, solar panels will be classed as ‘permitted development’. Under UK planning law, permitted development is a set of rules that allow you to make certain changes to your home without the need to apply for planning permission. The rules try to ease the administrative burden on someone who wants to make changes to the home they own while balancing the needs of the surrounding community.

Adding solar panels falls into this category – and for good reason. The government actively encourages renewable energy adoption as part of the UK’s net-zero commitments, and solar installations are seen as beneficial environmental improvements rather than changes that require planning scrutiny.

You normally won’t need planning permission if…

• The panels are installed on a pitched (sloping) roof and sit flush or close to the roof surface: In practice, this means panels mounted parallel to your roof’s slope using standard mounting rails. Modern solar installations are designed to sit as close as possible to the roof, typically just 5-10cm above the tiles
• The system does not protrude more than 20cm from the roof: This rule exists for two reasons – visual impact and structural safety. Panels that stick out significantly can look obtrusive and are more vulnerable to wind damage. Standard residential installations easily meet this requirement, with most systems protruding less than 10cm
• The panels are positioned to minimise visual impact: While there’s no rigid definition of ‘minimising visual impact’, it generally means avoiding unnecessarily prominent placements when alternatives exist

For the majority of houses in the South East, roof-mounted solar panels will fall comfortably within these rules. And if you have any concerns, don’t worry – during our initial visit, we’ll assess your property and confirm whether planning permission is needed. We’ll do this before providing a quote to give you complete certainty from the start. The Planning Portal is also a good resource and it’s where you’ll be able to find your local planning authority in case you need to contact them.

When do you need planning permission for solar panels?

There are some circumstances where you will need to seek planning permission for solar panels. These include:

• Listed buildings. If your property is listed, you will usually need consent, even if the panels are discreetly installed
• Conservation areas. If you live in a designated conservation area, national park, or Area of Outstanding Natural Beauty (AONB), you may need to get permission, and may not be able to fit them on structures that face a public highway. However, panels on other roof slopes (rear or side) often still qualify as permitted development
• Ground-mounted / standalone solar panels. Ground-mounted or standalone solar panels (for example, in a garden) must meet size, height, and positioning limits, and larger systems may require permission
• Flats and apartment blocks. Solar installations on blocks of flats or shared buildings can be more complex and may require planning approval and permission from the leaseholder

How to check your property’s status

Before worrying about planning permission, it’s worth checking whether any special designations apply to your property:

• Listed building status: This is a matter of public record, so search you can search your address on the Historic England website or your local council’s planning portal
• Conservation areas: Your local council’s website will have maps showing designated conservation areas, and these boundaries are clearly defined
• National parks and AONBs: Check the government’s MAGIC map service, which shows all designated landscapes across England

If you’re still unsure, simply ask us during your consultation. We routinely check these factors for every property we assess.

Ground-mounted solar panels: planning permission requirements 

Ground-mounted systems can be an excellent solution if your roof isn’t suitable due to shading, structural limitations, or orientation. We’ll assess whether ground mounting makes sense for your property and confirm the planning requirements. Ground-mounted or stand-alone solar panels installed within the grounds of a house are often still classed as ‘permitted development’, provided they meet the following criteria:

• The panel array does not exceed 9m²
• The system is no taller than 4m
• It’s located within 5m of the property’s boundary
• They are not installed within the boundary of a listed building
• Your property is not located within a national park or conservation area

If you’re unsure about your planned ground-mounted solar array, check with your local authority before any work begins.

Other considerations

Even when planning permission isn’t required, all solar installations must comply with building regulations. These cover critical safety and structural considerations:

• Structural integrity: Your roof must be capable of safely supporting the additional weight of the solar panels and mounting equipment. We carry out structural calculations for every installation, ensuring the load is properly distributed across your roof’s timber framework.
• Electrical safety: All electrical work must meet current wiring regulations and safety standards. As MCS-certified installers, we follow strict protocols to ensure your system is safe and compliant.
• Fire safety: Installations must not compromise your roof’s fire resistance or create new fire risks. Modern solar equipment includes built-in safety features, and our installation methods preserve your roof’s existing fire protection.

The good news is, we’ll handle these aspects for you as part of our installation process. With a wealth of experience in construction, our knowledge of the planning system is extensive, and we have used our expertise to install solar systems in a wide variety of locations and settings. We’ve even navigated the planning process in order to fit solar panels on an historic Grade II-listed church. If you have any concerns at all about needing planning permission to add solar to your home, we’re here to help make the process as smooth as possible.

What if you do need planning permission for your solar panels?

If your property does require planning permission, it’s not the end of the road. Solar panel planning applications have high success rates, particularly when applicants demonstrate thoughtful design choices and minimal visual impact.

The process typically takes 8-12 weeks from submission to decision. You’ll need to provide details of the proposed installation, including panel specifications, mounting methods, and visual impact assessments. We support our customers through this process, providing the technical documentation planning officers need and advising on how to strengthen applications.

The short answer

For most residential solar installations in the South East, you won’t need planning permission. Typical homes can proceed under permitted development rights, allowing you to move forward with confidence.

That said, every property is different, and rules can vary depending on location and building type. The best approach is to get expert advice specific to your home – which is exactly what we provide during our initial consultation.

Don’t let uncertainty about planning permission delay your solar investment. Get in touch with us today for a quote. We’ll assess your property, confirm the planning position, and design a system that works for your home, whether that’s a straightforward installation or requires a more considered approach.