Do I Need Building Regulations Approval to Re-Roof?
Replacing a roof covering is normally notifiable under the Building Regulations in England, and stripping more than 25 per cent of a roof is treated as renovating a thermal element, which can trigger an insulation upgrade. A like for like repair to a small area usually is exempt. Planning permission is generally not required for a like for like re-roof, though conservation areas and listed buildings change that, and Leeds has a number of designated conservation areas.
Two different sets of rules can apply to a roof, and people mix them up constantly. Planning permission is about how the building looks and how it affects everyone else. Building Regulations are about how it performs: structure, weather tightness, fire, and heat loss. A job can need one, both or neither. Most re-roofs in Leeds need the second and not the first.
Here is how each one works, and what it means for the price of the job.
What roof work is notifiable under Building Regulations?
GOV.UK lists replacing roof coverings on pitched and flat roofs as work that may need building regulations approval. The principle is straightforward. Once the covering is off, the roof is being rebuilt, and the rebuilt roof has to meet current standards for structure, weather resistance and insulation.
Patch repairs sit outside it. Refixing half a dozen slipped slates on a Chapel Allerton terrace, re-bedding a loose ridge tile or renewing one lead flashing is maintenance. Nobody notifies that and nobody expects you to.
The line between the two is a matter of area, which is where the 25 per cent figure comes in.
What is the 25 per cent rule?
A roof is a thermal element. Approved Document L sets thresholds for when renovating a thermal element means the whole element has to be brought up to current standards. In practice, building control departments and roofing contractors work to the same rule of thumb: strip and recover more than 25 per cent of a roof and the insulation requirement applies to the whole roof.
That matters most on a terrace where only the rear outrigger is being done, or where one slope is being stripped and the other left. It is worth knowing the split before the quote is written, because it can change what the job includes.
What does the insulation upgrade mean in practice?
It depends on where the insulation sits.
| Roof type | What normally satisfies it | Typical cost effect |
|---|---|---|
| Pitched roof, cold loft | Top up loft insulation to current standards, roughly 270mm of mineral wool | £300 to £900 on an average Leeds house |
| Pitched roof, room in the roof | Insulation between and over the rafters, which affects the internal finish | Significant, and best planned with the re-roof |
| Flat roof recovered | Convert to a warm deck with insulation board over the deck | £30 to £60 per square metre |
| Loft already well insulated | Nothing further, the element already meets the standard | None |
Approved Document L sets the target U-values for each of those cases. The cheapest of them by a long way is the cold loft, which is the situation in most Leeds terraces and semis. If your loft already has a decent depth of insulation laid in two directions, the requirement is usually already satisfied and the re-roof carries on as normal.
Where a roof has been converted into a bedroom, the picture is different. Insulating at rafter level means either working from outside while the covering is off, which is the sensible moment, or losing headroom inside later. That is the one case where the rule genuinely changes what you should do.
Who signs a Leeds re-roof off?
You have two routes. Leeds City Council building control takes a building notice for work of this kind, inspects, and issues a completion certificate. Or you can appoint a registered building control approver and use them instead.
There is a third route for some contractors. Competent person schemes exist that allow a registered installer to self certify roofing work and notify building control on your behalf. Ask any roofer directly whether they are registered with one. If they are, they will give you a scheme name and a registration number you can check on the scheme’s own website. If they are not, the work goes through building control the normal way and somebody has to submit the notice.
Agree who is doing that before the scaffold goes up. It costs very little to arrange in advance and is tedious to sort out afterwards.
Do I need planning permission to re-roof?
Usually no. The Planning Portal’s guidance on roofs says that work to the roof of a house which does not materially affect its external appearance will not normally require planning permission. A like for like re-roof in the same material is exactly that.
The conditions attached to the permitted development rights are worth knowing:
- The work must not project more than 150mm from the plane of the existing roof slope
- It must not exceed the height of the existing roof
- Different rules apply to loft conversions, dormers and additional storeys
Changing the material is where it gets less certain. Going from natural slate to concrete tile on a prominent front elevation can be argued to materially affect the appearance, particularly on a uniform Victorian street. If you are changing material, ring the council’s planning team before you order.
What changes in a conservation area or on a listed building?
A lot. Leeds City Council designates conservation areas across the district, and they cover a good deal of the older housing stock this site works on. Inside one, permitted development rights are restricted and the council will expect the roof covering to match what is there. An artificial substitute on a visible slope is usually refused.
Listed buildings are a separate consent regime again. Work to a listed building, including re-roofing, normally requires listed building consent, and doing it without consent is a criminal offence rather than a planning breach. Check the listing and the conservation area boundary for your address on the council’s heritage pages before anyone quotes.
The practical upshot in a Leeds conservation area is a reclaim and relay, or new covering in matching material, priced accordingly. That is a real cost difference and it belongs in the quote from day one.
What if a previous re-roof was never notified?
It shows up at sale. A buyer’s solicitor asks for the completion certificate, the seller cannot produce one, and the transaction stalls while everyone works out what to do. The usual remedies are a regularisation application to Leeds City Council building control, which means opening up work for inspection, or an indemnity policy, which covers the legal risk without making the roof compliant.
Neither is fatal. Both are easier to avoid than to fix. If you are buying a house in Leeds with an obviously recent roof, ask for the paperwork before you exchange.
Sorting the paperwork with the job
We tell you at the survey which of these applies to your roof, what the insulation requirement means for your loft, and who will submit the notice. It goes in the written quote alongside the scaffold and the materials. Our re-roofing page walks through the job itself, and the Chapel Allerton page covers the terraced stock where these questions come up most.