Planning rules in Northern Ireland

Northern Ireland’s own rules

Householder permitted development here sits under the Planning (General Permitted Development) Order (Northern Ireland) 2015, amended in 2023 to widen what counts as permitted development for domestic microgeneration equipment. So permission for solar equipment in general does exist without a full planning application, in a lot of cases.

NIDirect’s own guidance to householders says you “may have to get planning permission to fit a PV system, especially in conservation areas or on listed buildings,” and tells you to “always check with your divisional planning office about planning issues before you have a system installed.” That’s the whole of the public guidance.

What the guidance doesn’t say

It gives no projection limits and no thresholds in millimetres. It says nothing about flats or balconies. And it doesn’t mention plug-in solar as its own category at all, which England’s guidance now does and Scotland’s guidance does too.

That’s a different problem from a strict rule you might fail. It’s an absence: nobody has written the specific answer down yet for this product, in this jurisdiction.

Why we don’t borrow England’s answer

England’s permitted development right was rewritten on 27 August 2026, and that rewrite now excludes plug-in solar fixed to a wooden wall, a balcony or timber cladding. That change is English planning law. It does not extend to Northern Ireland, and Northern Ireland is a separate planning jurisdiction with its own legislation.

So we don’t apply England’s limit here, and we won’t tell you it does or doesn’t cover your wall based on a rule that was never written for this jurisdiction. Until Northern Ireland’s own guidance says more, the honest answer is to check with your divisional planning office directly.