Do you need planning permission for solar panels?

Most domestic solar panel installations in England do not require full planning permission, often falling under Permitted Development Rights (PDR) if specific conditions are met. However, rules become stricter for listed properties, homes in conservation areas, or for ground-mounted systems, frequently requiring explicit consent or a full planning application. Understanding these regulations is crucial for a smooth installation and to avoid potential legal issues.

Understanding permitted development rights for solar panels

PDR allow homeowners to make certain changes to their property without needing to apply for full planning permission from their local authority. For solar panels, these rights aim to simplify the process of installing renewable energy technology.

What are permitted development rights?

PDR are a set of national rules that grant automatic planning permission for specific types of development. The Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended) outlines these rights for solar panels, meaning many homeowners can install them more straightforwardly than expected.

Key conditions for roof-mounted solar

To qualify as permitted development, roof-mounted solar panels must meet several conditions:

• Protrusion: Panels should not protrude more than 200mm from the roof surface on a pitched roof. On a flat roof, the highest part of the solar equipment cannot be more than 600mm higher than the highest part of the roof (excluding the chimney).
• Height: The panels must not extend above the highest part of the roof, excluding the chimney.
• Siting: Equipment should be sited, as far as practicable, to minimise its effect on the external appearance of the building and the amenity of the area.
• Protected properties: The panels must not be installed on a building within the grounds of a listed building or on a site designated as a scheduled monument.

When PDR may not apply

While PDR cover most domestic installations, there are situations where full planning permission or other consents will be required:

• If your property is a listed building.
• If your property is in a conservation area, especially if panels are on a wall or roof enclosure facing a highway.
• If your PDR have been removed, for example, by an Article 4 Direction.
• If the installation deviates from the size and placement requirements for permitted development.

Solar panels on listed buildings and in conservation areas

Properties with historical or architectural significance, or those located in protected areas, have stricter planning controls to preserve their character.

Listed buildings: strict rules apply

For listed buildings, installing solar panels almost always requires listed building consent, and often full planning permission. This is because any alterations must preserve the building's historic importance and character. The local planning authority will assess the visual impact, placement, and structural integrity of the proposed installation. Solar panels should ideally be placed in less visible areas, as prominent roof slopes may not be suitable.

Conservation areas: balancing aesthetics and sustainability

In conservation areas, solar panels are generally permitted, but restrictions apply to minimise visual impact. For instance, panels should not be fitted to a wall or roof enclosure that fronts a highway in a conservation area. Some conservation areas may also have an Article 4 Direction, which can remove certain PDR, necessitating a full planning application.

Seeking consent for protected properties

If your property is listed or in a conservation area, it is crucial to consult your local planning authority early in the process. You will need to submit an application detailing how the panels will be installed, their appearance, and how they will integrate with the existing structure and surroundings.

Planning permission for ground-mounted solar panels

Rules for ground-mounted solar panels differ from roof-mounted installations, with specific limits on size and location.

Size and location restrictions

Ground-mounted solar panels typically require planning permission if they exceed certain thresholds. Generally, a ground-mounted installation is permitted development if:

• The total surface area of the panels is no more than 9 square metres.
• No part of the equipment is taller than 4 metres.
• It is positioned at least 5 metres from property boundaries.
• There isn't already another stand-alone ground-mounted solar installation on the property.

Considerations for larger arrays

For larger ground-mounted systems, such as those for agricultural buildings or significant domestic installations, planning permission is almost always required. The local planning authority will assess the visual impact and other factors.

Beyond planning: building regulations for solar installations

All solar panel installations, regardless of planning permission status, must comply with UK Building Regulations. These regulations focus on the safety and technical standards of the work, covering aspects like structural integrity, electrical safety, and fire safety.

Structural integrity and roof loading

Your roof must be capable of supporting the additional weight of the solar panels and mounting equipment. Installers will calculate the loading and ensure the roof structure remains sound, particularly for older properties. For flat roofs, a structural report is often advised due to the heavier racking systems required.

Electrical safety requirements

Solar panel systems generate electricity, so their electrical design and installation must comply with UK wiring regulations (BS 7671) and be safely integrated into your property's electrical system. Part P of the Building Regulations specifically covers electrical safety in domestic properties, meaning solar panel electrical work is "notifiable". Using an MCS-certified installer typically handles all Part P compliance automatically.

Fire safety considerations

Installations must also account for fire safety requirements, including provisions for electrical installations and penetrations through fire-resisting elements. Proper ventilation around panels can also help prevent overheating.

Navigating the planning application process

If your proposed solar panel installation does not qualify for PDR, or if your property is listed or in a protected area, you will need to apply for planning permission or relevant consent.

When to apply for full planning permission

You will need to apply for full planning permission if your installation:

• Exceeds the limits set out by PDR.
• Is on a listed building (requiring Listed Building Consent).
• Is in a conservation area and involves panels on a wall or roof slope facing a highway.
• Is a ground-mounted system larger than 9 square metres or taller than 4 metres.
• Is in an area where PDR have been removed by an Article 4 Direction.

How to submit your application

Applications for planning permission can typically be made online through the Planning Portal or directly via your local council's website. You will need to provide detailed plans, including illustrations of where the panels will be installed, what they will look like, and how they will fit with their surroundings. Application fees may apply.

Tips for a successful application

• Consult early: Speak to your local planning authority before finalising your plans, especially for properties in sensitive areas.
• Provide clear documentation: Ensure your application includes all necessary drawings, photographs, and explanations.
• Minimise visual impact: Design your installation to be as discreet as possible, considering panel colour, finish, and placement.
• Consider a lawful development certificate: If you believe your installation falls under PDR but want formal confirmation, you can apply for a Lawful Development Certificate from your local planning authority. This provides legal assurance that planning permission is not required.