Who notifies building control about a rooflight?

The two routes

A building notice to the local authority, with inspections at key stages and a completion certificate at the end. That is the route for most rooflight work.

Competent person self-certification, where a registered installer certifies their own work under a scheme. It applies to replacement glazing in some circumstances and not to structural alterations.

When it is notifiable

A new opening: always, for structure and thermal performance.

An opening changing size: yes, structural work.

Like for like replacement: generally not, though the unit must still meet the thermal standard.

What is inspected

The structural opening and its trimming, thermal performance and continuity of insulation, safety glazing overhead, and ventilation where relevant.

Why the certificate matters

It is the document a buyer’s solicitor asks for. Notifiable work that was never notified turns into a question during conveyancing, and the usual remedy is a regularisation application with the building opened up for inspection.

Far cheaper to do it correctly the first time.

Where the work is part of an extension

The rooflight is covered by that project’s approval rather than needing its own notification, and the builder handles it.

Keep it somewhere sensible

The certificate, the quotation and the product data together. You will want them in fifteen years.

The installer, not you

Where a rooflight is notifiable, it is the installer’s responsibility to deal with Building Control, and it should appear as a named line on the quotation rather than as something you discover you were supposed to arrange.

There are two routes and they work differently.

Competent person self certification

Where the installer is registered with a relevant competent person scheme, they certify the work themselves against the regulations and notify the local authority afterwards. You receive a certificate.

No application, no council fee, no inspection visit. This is the usual route for a straightforward replacement and it is the simplest for everybody.

Building notice or full plans

Where the installer is not registered, or where the work is structural rather than a straight replacement, the route is an application to the local authority Building Control department or an approved inspector.

That involves a fee, and it involves inspection visits at agreed stages, typically when the structure is open and again at completion. At the end you receive a completion certificate.

This is the route for a new opening, particularly in a trussed rafter roof where a designed trimmer is required, and it is the right route rather than a burden: an independent inspection of structural work is worth having.

When it is part of a larger project

Where the rooflight forms part of an extension or a loft conversion already going through Building Control, it is covered by that application and nothing separate is needed. The main contractor’s Building Control process picks it up.

Tell us if that is the situation, because it changes what belongs on our quotation.

Why it matters

The practical reason is the sale of the property. A conveyancing solicitor will ask for evidence that building work was notified, and the absence of a certificate produces a delay, an indemnity policy or a retention at exactly the moment you least want one.

Getting it notified at the time costs very little. Regularising it years later is considerably harder, because the installation is buried and nobody can inspect what is behind the lining.

What to keep

The certificate itself, the written specification naming the unit and the glazing, and our workmanship guarantee. Put them with the house paperwork rather than in a drawer, because in fifteen years nobody will remember which company did the work.

It depends which route the work goes down

Competent person self certification. Where the installer is registered under an appropriate scheme, they notify and certify the work themselves. A certificate is issued to you and the work is lodged with the local authority. No separate application and no inspection visits.

This covers most straightforward rooflight replacements.

A building control application. Made to the local authority or an approved inspector, with inspections at stages and a completion certificate at the end. This is the route where structural alteration is involved, a substantial new opening is being formed, or the rooflight is part of a larger project.

Whose responsibility it is

Legally, the building owner is responsible for ensuring notifiable work is notified. In practice the installer arranges it, and a good one tells you which route applies before the work starts.

What you should not do is assume it has been handled. Ask which route, and ask for the certificate.

Why it matters years later

Conveyancing enquiries ask for evidence that controlled work was notified. A missing certificate surfaces at exactly the wrong moment and is far harder to resolve retrospectively.

Regularisation after the event is possible, and it is neither quick nor cheap. On structural work it may require opening up what is already covered so an inspector can see it.

The separate question

Planning permission. Different system, different rules, and satisfying building control says nothing about it. On a listed building or in a conservation area, the consent question comes first and is not the installer certificate.