For companies considering solar installations, understanding the regulatory landscape is critical, and determining whether a solar panel construction permit is required is critical.
Early 2024,a review led by the Departments for Energy Security and Net Zero (DESNZ), Leveling Up, Housing and Communities (DLUHC) and Media and Sport have identified planning rules for solar panels as a key barrier to wider adoption.
This guide provides a detailed overview of building permit requirements, with an emphasis on commercial and industrial contexts, to help property owners and energy managers navigate the process effectively.
What is a building permit for solar panels?
In many cases, solar panels installed on commercial and residential properties benefit from ‘permitted development rights’, allowing projects to proceed without formal plan approval.
These rights are subject to specific conditions and restrictions, especially for commercial real estate. Understanding when to apply for a solar building permit is essential to avoid delays, fines or the need to remove non-compliant installations.
Do solar panels fall under permitted buildings?
Permitted development rights are granted under the Town and Country Planning (General Perlied Development) (England) Order 2015, which allows certain developments to proceed without a formal application.
For commercial real estate, the permitted development rights apply to solar PV systems on roofs that meet the following conditions:
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The panels extend a maximum of one meter above the highest part of the roof (excluding chimneys).
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The installation does not extend beyond the roof edge.
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The system will not be installed on a listed building or within a conservation area where this would affect the character of the building.
Ground-mounted solar PV systems may also qualify for permitted development if they meet size and location restrictions. However, larger arrays or installations in sensitive areas often require full solar panel building permits.
When do solar panels need a building permit?
Major situations in which a building permit is required for solar PV installations include:
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Monumental buildings: Any solar installation on or near a listed building requires planning permission to maintain its historic character. Many listed buildings in Britain have solar installed on their roofs, such as the British library And York Minister.
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Protected areas: Installations that are visible from public spaces in nature reserves usually require approval.
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Ground-mounted systems: Arrays larger than nine square meters or three meters high require a building permit.
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Boundaries of the roofline: Panels that extend more than one meter above the roofline or beyond the eaves require approval.
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Large-scale installations: Commercial systems with a capacity of more than 50 kW often require a building permit due to their size and potential impact.
By conducting a site-specific assessment, companies can determine whether their project falls within these categories.
Building permit for solar panels on roofs
Rooftop solar PV systems are the most common choice for commercial properties, offering a space-efficient way to generate renewable energy. Although many roof installations fall within permitted development, it is advisable for companies planning large-scale roof systems to consult with local planning authorities (LPAs) early in the process to confirm compliance with solar planning permission regulations.
Planning rules for ground-mounted solar PV
Ground-mounted solar PV systems are often used for larger commercial projects. For example, the UK headquarters of the Ford Motor Company deployed a 5.2 MWp solar panel last year to meet 10% of Dunton’s total annual electricity demand.
Ground-mounted systems often involve more complex planning applications, including environmental impact assessments (EIAs) and consultation with local stakeholders. Typically these are performed by developers or service providers in cases where the installation is large enough to warrant it. Many companies offer these installations at no upfront cost, but charge the company for using the clean energy generated.
Considerations when planning solar PV for commercial buildings
Commercial and industrial properties face unique challenges when planning solar PV installations. Important factors to consider include:
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Building height: Taller buildings may require additional structural assessments to ensure roof systems are safe and compliant.
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Neighboring properties: Installations must not overshadow or dazzle nearby buildings.
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Grid infrastructure: Connecting large systems to the electricity grid may require upgrades or additional permissions from the distribution system operator (DNO).
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Fire safety: Compliance with fire safety regulations is critical, especially for roof systems on industrial sites.
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Control by local government: Commercial projects are often more closely controlled by LPAs, especially in urban areas or near conservation sites.
By addressing these factors early, companies can streamline the planning process and avoid potential obstacles.
How the solar PV planning application process works
The construction application process for solar panels involves several steps, which can vary depending on the complexity of the project. A typical process includes:
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Pre-application checks: Consult the LPA to confirm whether planning permission is required for solar panels and to identify any site-specific issues.
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Document submission: Prepare and submit required documents, including site plans, design details and environmental assessments.
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Decision timelines: LPAs aim to decide within 8 weeks for standard applications or 13 weeks for larger projects.
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Common delays: Delays often occur due to incomplete applications, objections from local residents or requests for additional information.
Hiring a planning consultant or solar energy developer with experience in commercial projects can contribute to a smooth application process.
Successfully navigate solar building permits
Understanding construction permit requirements for solar panels is essential for commercial property owners and developers. While many installations benefit from permitted development rights, larger or more complex projects often require formal approval.
By conducting pre-application checks, taking into account site-specific considerations and avoiding common mistakes, companies can navigate the planning process with confidence.
For more detailed guidance, please contact your local planning authority or a qualified solar developer. Early planning and due diligence are critical to reaping the benefits of solar energy while ensuring compliance with regulatory requirements.
