Solar Panel Planning Permission: Do You Need It in 2026?
Clear guidance on when you do and do not need planning permission for solar panels in 2026. Covers listed buildings, conservation areas, and Wiltshire-specific rules.
The vast majority of domestic solar panel installations in Swindon do not require planning permission. Under permitted development rights, solar panels on a pitched roof are automatically permitted provided they do not protrude more than 200mm above the roof plane and are not installed on a listed building or within a World Heritage Site. Conservation area properties require that panels are not visible from a highway. Always check with Wiltshire Council or Swindon Borough Council if your property has any designation.
Permitted Development Rights for Solar Panels
Permitted development rights are a form of planning consent granted in advance by Parliament. They mean you do not need to submit a planning application for work that stays within set limits. For domestic solar panels the rules sit in the Town and Country Planning (General Permitted Development) (England) Order 2015, Schedule 2, Part 14. In plain terms, panels on a pitched roof that do not stick out more than 200mm, do not sit above the ridge line, and are not on a listed building or World Heritage Site are almost always covered without an application.
You do NOT need planning permission if:
- Panels are on a sloped (pitched) roof
- Panels do not protrude more than 200mm above the roof surface
- The property is not a listed building
- The installation is not on a World Heritage Site
- For conservation areas: panels are not visible from a highway or waterway
- The system does not extend beyond the highest point of the roof
When You Do Need Planning Permission
Listed buildings
All work to a listed building needs listed building consent, and solar panels are no exception. The council assesses the effect on the character and appearance of the building. Panels are sometimes approved when placed on a rear elevation that is not visible from the street and fitted with methods that avoid damage to historic fabric. It is decided case by case, so a conservation architect or heritage consultant is worth speaking to before you apply.
Conservation areas
Homes in a conservation area can still use permitted development, but only where the panels are not visible from a highway or waterway. In practice, panels on a rear south-facing roof are usually fine, while front-elevation panels almost always need an application. Swindon has several conservation areas, including Old Town, so it is worth checking your address on the Swindon Borough Council planning portal before you proceed.
Flat roof installations
Panels on a flat roof are generally permitted development on a home, subject to the same 200mm protrusion limit and the other standard conditions. Commercial properties fall under different rules in Part 14, Class B, and many larger or highly visible flat-roof arrays on business premises do need planning permission.
Ground-mounted systems
Ground-mounted panels fall under separate permitted development rules in Part 14, Class B. A domestic ground array under 9 square metres, roughly four to five panels, is generally permitted, but anything larger needs full planning permission. These setups are most common at rural properties with larger gardens.
Wiltshire Council and Swindon Borough Council Guidance
Swindon is a unitary authority, so most Swindon postcodes are handled by Swindon Borough Council rather than Wiltshire Council, which covers the surrounding county. Homes on the fringes or in nearby villages can fall under Wiltshire Council instead, so it is worth confirming which applies to your address. Both councils offer a pre-application advice service, which is useful if you are unsure whether your installation needs consent.
Building Regulations: Separate from Planning
Building regulations are separate from planning permission. Fitting solar panels to an existing home is generally exempt from building regulations under Schedule 2, Class 18. The electrical work, however, must meet Part P for electrical safety and be carried out by a member of a registered competent person scheme. MCS certified installers are registered with such a scheme, so the work is self-certified without needing a separate local authority inspection.
Do I Need to Notify Anyone?
Your installer also notifies the Distribution Network Operator, the company that runs the local grid. For systems up to 3.68kW single-phase, or 11.04kW three-phase, a G98 notification is submitted to the DNO, which for the Swindon area is National Grid Electricity Distribution. Larger systems need a G99 application, which takes longer to approve. An MCS installer handles all of this for you. If you live in a leasehold property, you may also need consent from your freeholder or management company before work starts.
Related guides
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