DIY Solar & Planning Permission: What You Can (and Cannot) Install Without Asking
The short answer: most roof-mounted solar panels on a standard UK house do not need planning permission. They fall under permitted development rights, which means you can fit them without submitting a planning application or waiting for council approval. But the rules get specific fast once you have a flat roof, want ground-mounted panels, live in a listed building, or fall inside a conservation area. Here is exactly what the law allows, what it does not, and what else you need to check before the panels go up.
When you do NOT need planning permission
For a standard domestic house with a pitched roof in England, rooftop solar panels are permitted development under Part 14, Class A of the General Permitted Development Order (GPDO). You can go ahead without contacting your local planning authority, provided the installation meets these conditions:
Conditions You Must Meet
- Panels must not protrude more than 200mm beyond the roof plane
- Panels must not sit higher than the highest part of the roof (excluding the chimney)
- Position panels to minimise visual impact on the building and surrounding area
- Remove equipment when it is no longer in use for generating power
Covers
- Detached, semi-detached, and terraced houses
- Bungalows (same rules apply)
- Solar PV and solar thermal panels
For the overwhelming majority of UK homes, this is the end of the story. A competent installer will already know these limits and design the system within them. If your roof is a standard pitched roof on a standard house, you are almost certainly fine to proceed.
Flat roof panels: different rules apply
Flat roofs complicate things because panels need tilt frames to face the sun, and those frames add height. The 200mm rule for pitched roofs does not apply here. Instead, panels on a flat roof must not protrude more than 1 metre above the roof plane. Most tilt frames add 300mm to 500mm, so this is rarely an issue on a domestic flat roof - but it is worth checking if you have a parapet wall or an unusually high mounting system.
Flat roof quick check
Measure from the flat roof surface to the highest point of the tilted panel. If it is under 1 metre and the panel does not sit above the ridge of any pitched section of the roof, you are within permitted development. Also worth noting: flat roof installs use ballast or fixed mounts that add weight, so get a structural check on the roof before committing.
Ground-mounted solar panels
Ground-mounted arrays fall under a separate class of permitted development (Class B, Part 14 GPDO). The rules are stricter than for rooftop panels but still manageable for most gardens:
| Ground-Mounted Permitted Development Limits | |
| Maximum height | 4 metres |
| Minimum distance from boundary | 5 metres |
| Number of arrays allowed | One per property |
| Conservation area / World Heritage Site | Cannot be closer to the road than the house |
| Front garden | Generally not permitted development (check with LPA) |
If you want a taller array, multiple separate arrays, or one that sits closer than 5 metres to your boundary, you will need a planning application. Most domestic ground-mounted systems are well within the 4-metre limit, so this is more of a concern for field-scale systems than a few panels in the garden.
Listed buildings: permitted development does not apply
If your home is a listed building or scheduled monument, permitted development rights disappear entirely. It doesn't matter how discreet the panels would be or whether they face the street. You need listed building consent from your local planning authority before any solar equipment is fitted, and you may also need separate planning permission depending on the property.
Giving your application the best chance
Council conservation officers assess three things: the visual impact on the building itself, the wider setting, and how much the installation physically alters the historic fabric. Applications that position panels on a rear roof slope, out of view from public roads, using frames and cabling designed to minimise penetration of the original roof covering, have a much better track record. Talk to your council's conservation officer before committing to a design - they will tell you what they are likely to accept.
Conservation areas: mostly fine, with one gotcha
Conservation areas are less restrictive than listed building status but still add a layer of rules. The key restriction: you cannot mount panels on a wall or roof slope that faces a highway within a conservation area - permitted development rights do not cover that scenario. Rear-facing panels or panels on a roof slope that does not face a road are generally still fine under permitted development.
The bigger risk in conservation areas is an Article 4 direction. Some councils use these to remove permitted development rights from specific areas or even individual streets within a conservation area. If an Article 4 direction covers your property, you may need a planning application for solar panels that would otherwise be permitted development. Check your council's planning constraints map on their website.
Building Regulations: the separate requirement people forget
Planning permission and Building Regulations are two completely different things. Even if your install is permitted development and needs no planning application, it must still comply with the Building Regulations. These cover:
- Part A (Structure): the roof must be able to carry the additional weight of the panels and mounting system
- Part P (Electrical safety): all wiring and connections must meet the wiring regulations (BS 7671)
- Fire safety: panels must not compromise fire resistance or escape routes
If you use an MCS-certified installer, they will handle Building Regulations compliance as part of the job. If you are doing a DIY install, you will need to notify Building Control and have the work inspected. See our G98/G99 DNO application guide for the grid-connection side of the paperwork.
Quick decision flowchart
| Do I Need Planning Permission for Solar Panels? | |
| Standard pitched roof, not listed, not conservation area | No - permitted development (Class A) |
| Flat roof, panels under 1m above roof plane | No - permitted development |
| Ground-mounted, under 4m tall, 5m+ from boundary | No - permitted development (Class B) |
| Listed building (any install) | Yes - listed building consent required |
| Conservation area, panels facing a highway | Yes - planning application needed |
| Conservation area, rear-facing panels | Check - usually OK unless Article 4 direction applies |
| Ground array in conservation area, in front of house line | Yes - planning application needed |
| Flat or maisonette (not a house) | Check - permitted development may not apply |
This table covers England. Scotland, Wales, and Northern Ireland have their own permitted development rules with slightly different thresholds. Always check your local council's planning portal for site-specific advice.
What to do next if you are clear to install
If your property falls squarely within permitted development, the next step is the technical side: sizing your system, choosing equipment, and handling the DNO notification. Here are the guides that pick up where this one leaves off:
- G98/G99 DNO application: every grid-connected install needs one. Read the step-by-step guide.
- DIY installation: from rails to sign-off, our full installation guide covers the physical build.
- System sizing: work out how many panels you actually need with the solar calculator.
- Grants and incentives: once you are installing, check which schemes you qualify for on the UK solar grants page.
Rather have it installed?
If you would prefer a professional install, tell us about your roof and timeline and we will pass your details to local installers who can quote for the job. We do not install anything ourselves, and your details go to installers for that purpose only. See our privacy policy for the details.
Get quotes from local installers →Frequently asked questions
Do I need planning permission for solar panels in the UK?
For most domestic homes the answer is no. Rooftop solar panels on a house are usually permitted development under Part 14 of the General Permitted Development Order. You can install without a planning application as long as the panels do not protrude more than 200mm from the roof plane, do not sit above the ridge line, and are not on a listed building. Ground-mounted panels have separate limits: max 4m height, min 5m from boundary, and only one array per house.
Can I put solar panels on a listed building?
Only with listed building consent. Permitted development rights do NOT apply to listed buildings or scheduled monuments. You need consent from your local planning authority before any work. Rear-roof applications that minimise visibility and avoid altering the building fabric have the best chance of approval. Talk to your council's conservation officer early in the process.
What are the solar panel rules for conservation areas?
Rear-facing panels and panels on roof slopes that do not face a highway can still go ahead under permitted development. The restriction applies specifically to panels on a wall or roof slope that faces a road. Also check whether an Article 4 direction applies - these can remove permitted development rights in specific streets or areas within the conservation area.
How high can ground-mounted solar panels be without permission?
Under permitted development, a ground-mounted array must not exceed 4 metres in height, must sit at least 5 metres from any boundary, and you can only have one array per house. In conservation areas it also cannot be closer to the road than the house itself. Anything larger needs a planning application.
Do Building Regulations apply to solar panels?
Yes, regardless of planning permission. Building Regulations cover the structural safety of the roof under the added weight (Part A), the electrical installation (Part P), and fire safety. An MCS-certified installer handles this for you. For DIY installs, you need to notify Building Control and have the work inspected.
What if my property has an Article 4 direction?
An Article 4 direction removes permitted development rights in a specific area, often a conservation area or estate. If one covers your property, you will need a planning application even for a standard rooftop install that would normally be exempt. Check your local council's planning constraints map to see if one applies to your address.