Solar Planning Permission & Grid Connection on the South Coast (2026)

Do you need planning permission for solar panels?

For the large majority of South Coast homes, the answer is no. Fitting solar panels to the roof of a house in England is usually classed as permitted development, which means you do not need to submit a planning application at all. The rules exist to keep installations discreet rather than to stop them, and a standard array on a standard house comfortably meets them.

Two conditions do the heavy lifting. The panels must not protrude more than 200mm from the roof slope — in other words they should sit close to the tiles rather than standing proud on a tall frame. And they must not sit above the highest part of the roof; the ridge line is the limit, with the chimney excluded from that measurement. Meet both and, for most houses, you are within permitted development.

This is genuinely good news, because it removes weeks of waiting and a council fee from the typical project. But permitted development is not universal — a specific set of exceptions removes or narrows those rights, and the South Coast, with its heritage towns and protected coastline, has more of them than most regions. Knowing which category your home falls into before you commit is exactly the sort of thing we check during a survey.

• ✓Most house roof solar is permitted development — no planning application needed
• ✓Panels must project no more than 200mm from the roof slope
• ✓Panels must sit below the highest part of the roof (the chimney is excluded)
• ✓Exceptions apply to conservation areas, listed buildings and some flat-roof or ground-mounted arrays

The exceptions that catch South Coast homeowners

Permitted development rights are narrowed or removed in a handful of situations, and several of them are common along the South Coast. The first is position in a protected setting. If your home is in a conservation area or a World Heritage Site, panels fitted to a wall or roof slope that fronts a highway will normally need full planning permission. Panels on a rear or side slope out of public view often remain permitted development, so placement is everything.

The second and strictest exception is listed buildings. Any work to a listed building typically requires Listed Building Consent, regardless of which roof slope the panels go on and regardless of whether they are visible from the street. This is a separate consent from planning permission and it protects the fabric and character of the building, so it needs a sympathetic, well-presented application.

Finally, some flat-roof and ground-mounted arrays fall outside standard householder permitted development and may need an application in their own right. None of these exceptions is an automatic refusal — solar is rarely banned outright — but each changes the process. The practical rule of thumb: if your home is listed, in a conservation area, or you are planning a highway-facing or ground-mounted array, assume a consent step is likely and let us confirm before anything is ordered.

• ✓Conservation area / World Heritage Site: highway-facing panels usually need planning permission
• ✓Listed buildings: almost always need Listed Building Consent, whichever slope the panels go on
• ✓Rear or side slopes out of public view often stay permitted development
• ✓Some flat-roof and ground-mounted arrays sit outside householder permitted development

How SCSS designs for Chichester, Winchester and Brighton heritage areas

The South Coast has an unusually high concentration of protected settings, from Chichester and Winchester's conservation areas to Brighton's tightly packed townhouses and seafront. A blanket 'panels are difficult here' answer helps no one — the reality is that heritage areas need thoughtful design rather than a different technology, and a scheme that respects the building's character usually gets a fair hearing.

Our approach is to design discreet, all-black systems positioned on the rear slope wherever the roof allows, keeping the array out of sight from the street and public spaces. All-black panels read as a single dark plane rather than a grid of silver frames, which is exactly what conservation officers are looking for. Where a rear slope is not viable, we look at side slopes, in-roof mounting and outbuilding roofs before considering anything a planner is likely to object to.

Just as importantly, we flag the constraint early and honestly. If your property is listed or in a conservation area, we tell you at the survey stage whether consent is likely to be needed and what a sympathetic design looks like, rather than discovering it after you have paid a deposit. We would always rather raise it upfront than surprise you later.

The grid connection layer: G98 vs G99 explained

Planning is only half the permissions story. Every system that connects to the grid and can export electricity also has to satisfy your Distribution Network Operator (DNO) — the company that owns the local cables and substations. This is separate from planning permission and separate from your energy supplier, and it comes down to two engineering standards: G98 and G99.

G98 is the simpler route. It covers small systems up to 3.68kW per phase and works on a 'connect and notify' basis: the installation goes in, and the DNO is simply told about it afterwards. In practice that means we notify the DNO after commissioning, with no wait for approval holding up your install. It is the streamlined path a modest solar-only system typically takes.

G99 applies to larger systems, and — this is the part homeowners rarely realise — to anything with battery storage or a higher export capability. Under G99, an application is submitted to the DNO and approved before the install goes ahead, not after. We file that application for you and wait for the approval to come back before booking the work. Because most modern systems now include a battery, G99 is increasingly the standard route rather than the exception, so it pays to build the approval time into your plans.

• ✓G98: systems up to 3.68kW per phase — connect and notify, DNO told after commissioning
• ✓G99: larger systems and anything with a battery or export — application approved before install
• ✓G98 does not delay your install; G99 needs approval in hand first
• ✓Most systems with a battery fall under G99, so allow time for the application

SSEN vs UK Power Networks: which DNO covers your postcode

The South Coast is split between two Distribution Network Operators, and which one you deal with depends entirely on where you live. SSEN (Scottish and Southern Electricity Networks) covers Hampshire, the Isle of Wight, Dorset and the western part of Surrey. UK Power Networks (UKPN) covers East and West Sussex and most of Surrey.

This matters because the DNO is who the G98 notification or the G99 application goes to, and each operator runs its own process and timescales. A home in Portsmouth, Southampton, Bournemouth or on the Island connects through SSEN; a home in Brighton, Chichester, Worthing or across most of Surrey connects through UKPN. Surrey is the one to watch, since it straddles the boundary — the west sits with SSEN while most of the county falls under UKPN.

You do not need to work out the boundary yourself or contact either operator. Identifying the correct DNO and dealing with them is part of the job we handle, and knowing the regional split — and each operator's paperwork — is one of the advantages of using an installer based on the South Coast rather than a national firm working from a spreadsheet.

How SCSS handles the whole application for you

Planning and grid connection are the two bits of admin homeowners dread most, so we take both off your plate. On the planning side, we assess during your survey whether your home is within permitted development or whether a conservation-area, listed-building or ground-mount consent is likely to be needed, and we design the system to stay discreet and consent-friendly from the outset.

On the grid side, we determine whether your system falls under G98 or G99, identify whether SSEN or UK Power Networks is your operator, and submit the notification or application on your behalf. For a G99 system we file the application and wait for approval before we book the install, so you are never left connecting a battery without the DNO's sign-off. It is worth checking that any quote you receive includes this — a system connected without the correct DNO process is not properly compliant.

The result is that the permissions no one enjoys dealing with simply get handled, correctly and in the right order. If you would like us to map out exactly what applies to your roof and postcode — planning route, DNO, and connection standard — request a free, no-obligation quote and we will walk you through it in plain English, with no pressure to proceed.