The short answer
Most homes in Northern Ireland don't need planning permission for roof-mounted solar panels. They're permitted development — allowed without an application — provided the installation stays inside a few conditions. The exceptions are listed buildings, conservation areas and some unusual installs. Here's what the rules actually say, and what we check before anything is ordered.
Roof-mounted panels on a house: the conditions
- Projection: the panels must not stick out more than 200 mm from the roof slope (or wall) they're fitted to. Standard on-roof rails sit well inside this.
- Height: no part of the installation can sit higher than the highest part of the roof, excluding the chimney.
- Listed buildings: not permitted development — you need listed building consent and planning permission.
- Conservation areas: panels on a roof slope or wall that fronts a road generally need planning permission; rear roof faces and slopes not visible from the road are usually fine.
- Remove them when no longer needed — a standard condition attached to these rights.
Meet those and you don't apply for anything. In practice, a normal all-black array on the rear or side roof of a semi, a detached house or a bungalow in Belfast, Lisburn, Bangor or anywhere else in Northern Ireland is permitted development.
Conservation areas and listed buildings
Northern Ireland has plenty of both — Holywood, Hillsborough, Armagh's Georgian core, Derry's walled city, parts of Bangor, Portaferry, Downpatrick and many village centres. Conservation-area status doesn't ban solar; it means the street-facing roof is protected. We design for the rear face, specify slate-friendly fixings and all-black panels, and if the only usable roof faces the road we'll tell you what a planning application would involve rather than pretend the rules don't exist. Listed buildings are a different level of care and always need consent; we'll be straight about whether it's realistic.
Ground-mounted arrays, sheds and outbuildings
Panels on a garage, shed or outbuilding roof follow similar rules to the house. Ground-mounted arrays have their own permitted development limits — on size, height, distance from boundaries and position relative to the house — and bigger ground arrays need a planning application. Farm buildings and commercial roofs have separate provisions, and larger systems can need prior approval or full permission. We check the position for each site as part of the survey rather than giving a one-size answer.
Planning isn't the only permission
Two other things are easy to confuse with planning, and both are handled for you:
- NIE Networks connection. Every grid-connected system is notified to or approved by NIE Networks — G98 for systems up to 3.68 kW per phase (notified after install), G99 for larger systems (approved before install). Nothing to do with planning; everything to do with being allowed to connect and export.
- Electrical certification. Solar is electrical work and has to be installed and certified to BS 7671 by a competent contractor. As an NICEIC Approved Contractor we certify every install and register the connection.
What about batteries and EV chargers?
An indoor or garage-mounted battery needs no planning permission. Home EV charge points on a wall are usually permitted development too, within size limits and again with extra care on listed buildings. Planning is rarely the blocker for either; the supply and the consumer unit are what we check.
What we do
At the free survey we confirm whether your home is listed or in a conservation area, check the roof and the fixing method, and confirm the NIE Networks route. If anything needs an application we tell you before you commit. Solar panels in Belfast and NI covers the rest of the process.
Questions people ask
Do I need planning permission for solar panels on a semi-detached house in Belfast?
Almost never. A roof-mounted array that sits within 200 mm of the roof and below the ridge is permitted development, unless the house is listed or the roof faces a road in a conservation area.
Can I put solar panels on the front of my house?
Outside conservation areas, yes — the same permitted development rules apply to front and rear roof slopes. In a conservation area a road-facing slope normally needs planning permission.
Do I need planning permission for a home battery?
No — an indoor or garage battery is not a planning matter. It is electrical work and is certified as part of the install.
Who checks whether my house needs permission?
We do, at the survey, and if an application is genuinely needed we say so before anything is ordered.