Do you need building control for roofing work?

Short answer: for small repairs, usually not. For anything that counts as a proper re-roof, almost always yes — even if you're just replacing what's already there.

Here's the actual distinction, and it trips a lot of people up.

Minor repairs — no

Swapping a handful of slipped or cracked tiles, fixing a small area of flashing, patching a leak — this sits below the threshold and doesn't need sign-off from anyone.

A full or substantial re-roof — yes, even like-for-like

This catches people out. A roof counts as a "thermal element" under the regulations, and once you're stripping and re-covering a significant chunk of it — a full re-roof always qualifies — the work has to meet current energy efficiency standards, not just go back on looking the same as before. It doesn't matter that you're using the same type of tile you started with; it's the scale of the work that triggers it, not whether the finish changes.

Structural changes — always yes

Anything that touches the roof's structure needs Building Control regardless of size: altering rafters or the ridge, cutting in a new roof window or skylight, converting a flat roof to pitched, adding a dormer, or removing a chimney stack. These affect structural stability and sometimes fire safety, so there's no small-job exemption here.

Building Control isn't the same as planning permission

Worth clearing up, since the two get mixed together constantly. Planning permission is about how a change looks from the outside — decided by the council's planning department. Building Control is about whether the work is done safely and performs properly: structure, insulation, weatherproofing. They're separate processes with separate paperwork, and a job can need one, both, or neither.

Why it actually matters, beyond ticking a box

If a job needed sign-off and didn't get it, it tends to surface later — a buyer's solicitor flags it during a sale, or an insurer asks questions after a claim. A missing completion certificate is a genuinely annoying thing to have to sort out retroactively, years after the work's done.

The honest advice either way: ask whoever's doing the work whether your specific job needs Building Control before it starts, and get it confirmed rather than assumed. Rules have enough nuance — and enough regional variation — that "it depends on the job" is the accurate answer more often than a flat yes or no.