What Permits Do You Need to Install Solar Panels in the UK?
Solar installation involves several regulatory requirements that are often confused with each other. Planning permission, building regulations, electrical certifications, grid notifications, and MCS registration are all separate processes – and knowing which is needed for which job is a core competency for any solar installer.
The Four Regulatory Frameworks
Solar installation sits across four overlapping regulatory frameworks:
- Planning permission – do you need local authority consent to install?
- Building regulations – does the installation need building control sign-off?
- Electrical certification – who certifies the electrical work?
- Grid connection – how does the installation notify or connect to the grid?
These are independent of each other. You need to address each one separately.
Planning Permission
Most residential solar installations do NOT need planning permission. They fall under permitted development rights – the automatic right to make certain improvements to your home without applying for consent.
Permitted development applies for domestic solar in England when: – Panels don’t protrude more than 200mm from the roof plane – The installation is not on a wall or roof slope that faces a highway (or is not visible from the highway) – The highest point of the installation doesn’t exceed the highest point of the roof – The property is not a listed building
Planning permission IS required for: – Listed buildings (also requires listed building consent) – Properties in some conservation areas (Article 4 directions) – Installations that exceed permitted development conditions – All commercial property solar (permitted development for solar doesn’t extend to commercial buildings in the same way)
Scotland, Wales, Northern Ireland have their own planning systems with broadly similar but distinct rules. Check the applicable national guidance for cross-border jobs.
Practical action: check the Planning Portal and the Historic England National Heritage List at every survey.
Building Regulations
Solar PV installation does not typically require a full Building Regulations application. However, the electrical elements of the installation do need to comply with and be certified under Building Regulations (Part P).
This is achieved via your competent person scheme registration (NICEIC, NAPIT etc.) which allows you to self-certify the electrical work. You issue an Electrical Installation Certificate (EIC) and Minor Electrical Installation Works Certificate (MEIWC) as appropriate, and notify the completion to your scheme, which notifies the local authority building control on your behalf.
There is no separate Building Regulations application for a standard residential solar installation – this is handled automatically through your competent person scheme registration.
Exception: if the installation involves structural changes (reinforcing roof structure to carry the panel weight), a structural engineer’s sign-off and potentially a building control notification for the structural work may be needed.
Electrical Certification
Every solar PV installation requires an Electrical Installation Certificate on completion. This is issued by the installer and signed off by a qualified and registered electrician.
Requirements: – Issued by a registered member of a competent person scheme (NICEIC, NAPIT etc.) – Provided to the customer and a copy retained by the installer – Referenced in the MCS installation certificate
Grid Connection (DNO Notification)
All solar PV systems connected to the grid require notification to or approval from the local DNO:
- G98 (≤3.68kW single phase): notification within 28 days of commissioning
- G99 (>3.68kW single phase): prior application and approval before installation
This is a separate process from planning, Building Regulations, and MCS registration. All four processes must be completed for a fully compliant residential solar installation.
MCS Registration
MCS registration of the installation is required for the customer to access the Smart Export Guarantee. This is not a permit or approval process – it’s registration of a completed installation on the MCS database.
Requirements: – Complete the installation – Issue the MCS installation certificate to the customer – Register the installation on the MCS installation database
Summary: What’s Required for a Standard Residential Solar Installation
| Requirement | Usually needed? | Process |
|---|---|---|
| Planning permission | No (permitted development) | N/A unless listed building or Article 4 |
| Building regulations | Via competent person scheme | Self-certify via NICEIC/NAPIT etc. |
| Electrical installation certificate | Yes | Issue on completion |
| G98/G99 notification | Yes | Notify DNO (G98 within 28 days, or G99 prior approval) |
| MCS registration | Yes (for SEG access) | Register on MCS database post-installation |
Frequently Asked Questions
Do I need to apply for anything before installing solar on a standard house? For a G98 installation (≤3.68kW) on a standard (non-listed, non-conservation area) house: no prior applications are needed. You can proceed with installation and submit your G98 notification and MCS registration after completion.
What about commercial solar installations? Commercial solar installations require a planning assessment (no equivalent permitted development rights), and often G99 DNO approval prior to installation. The regulatory complexity of commercial solar is significantly higher than residential.
Who is responsible for making sure all permits and notifications are in place? As the installer, you are responsible for the electrical certification, DNO notification, and MCS registration. Planning permission is the property owner’s responsibility – but you should confirm its status before proceeding with an installation that might require it.
CoreQuote helps solar installers manage job documentation – including compliance records – alongside quotes and invoices. kwowta.com
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