Planning permission, listed building consent and Building Regulations approval are three different permissions, and roof work can touch any of them, all of them or none. People mix them up constantly, which is how a simple repair gets delayed by an application nobody needed, or a bigger job goes ahead without a consent it did require. This guide separates them. It starts with the plain case, a repair or a like-for-like re-covering, and then moves to the situations where the answer changes: alterations that enlarge or reshape a roof, streets with an Article 4 direction, conservation areas, and listed buildings. It finishes with the practical steps for a Bath address, and what changes if your house sits in another council's area. This is general guidance, not legal advice. Only the council for your address can say what applies to your property, and a brief enquiry before work begins costs far less than correcting a mistake afterwards.
Three permissions that people confuse
Start with what each one is for, because the same roof job can be answered differently under each.
Planning permission controls the use of land and the appearance and scale of development. Decisions sit with the local planning authority, and for Bath that body is B&NES Council. Many small householder changes fall under permitted development, a set of national rights that let certain work go ahead without a planning application, within limits and conditions.
Listed building consent is a separate regime that protects the special interest of a listed building. It applies to work that affects that interest, including changes to the roof covering, the chimneys and the structure, and it comes from the same council. B&NES is clear that the two are distinct, so holding one gives you no claim to the other.
Building Regulations are about how a building is built, including its structure, fire safety and energy performance. They are a technical check, not a decision about appearance, and they are dealt with by building control. Applications go either to the council's in-house team or to a private firm that is a registered building control approver, a status that replaced approved inspectors in April 2024.
Why does this matter on a roof? Because the three tests use different triggers. A re-roof that needs no planning application can still need Building Regulations approval if it is big enough or heavy enough. A repair to a listed house may need consent even though it is a repair. Always ask which of the three you are dealing with, not whether you need permission in general.
Our companion page on roofs in the Bath World Heritage Site covers how the status of the city sits behind these rules.
Repairs and like-for-like re-covering
The plainest case is the one most owners are in. A slipped tile is replaced. A section of lead is patched. A ridge is rebedded. A gutter is renewed. These are repairs, and they generally raise no planning question because they do not change the building's size, shape or use. The same is broadly true of re-covering a roof in the same material, in the same colour and pattern, with no change to the profile.
The caution is the phrase like for like. A tile that looks similar but has a different profile or thickness, a man-made slate used where the original was natural, or a new ridge system that looks different from the old, can change the appearance of the roof. On an unlisted house outside any special area that is unlikely to matter. In a conservation area, on a prominent roof, or on a listed building, appearance is exactly what the council protects. The sensible approach is to say what you intend to the council before any change of material or appearance.
Repairs may still need Building Regulations approval in a few cases. The Planning Portal's test for a small job has two limbs, one about the envelope (under 25%) and one about the roof itself (under 50%), and both must be met. A new covering that is 15% or more heavier is caught whatever its size. Once a job passes those limits, the roof can also be treated as a thermal element that has to be brought up to standard.
That is why a simple repair does not usually involve an application, while a full re-roof can involve building control. At the survey we explain which consents apply, and where work is notifiable the Building Regulations paperwork is ours to deal with. For recurring small faults, our roof maintenance checklist is the way to catch them early.
Alterations that change the roof
Planning questions arise when a roof is altered rather than repaired. A new dormer, a hip-to-gable change, a raised ridge, a roof extension, a new rooflight opening or a change from pitched to flat all alter the shape of the building. Some of these can go ahead under permitted development, subject to conditions on size, position and materials. Others need a full application. Because those limits are set out in legislation, with different rules for different kinds of alteration, we do not summarise them here. The Planning Portal's roof pages are the starting point, and the council can confirm your own case.
Roof windows have a dedicated page. For the rules on installing one, including how they interact with conservation areas and listed buildings, see roof windows and rooflights rather than relying on a short summary here.
Rights under permitted development apply to houses, not to flats or maisonettes, and they can be removed or limited by Article 4 directions and by listing, which we cover below. Always check that the rights still exist on your property.
Building Regulations apply to alterations as well. A conservatory is the common example: swapping a glazed or polycarbonate conservatory roof for a solid roof counts as a material alteration, and building control must receive an application. If you are planning that, see conservatory roof replacement before you order a roof.
A loft conversion needs Building Regulations approval for structure, stairs, fire safety and escape routes, and it may need planning permission depending on the shape. These are matters for the council and for a designer, not a roofer's guess. The right order is to settle the permissions, then price the roof work. We cover the roof itself after the design is agreed.
Article 4 directions: where permitted development is withdrawn
An Article 4 direction is an order from the council that takes away some permitted development rights within a set boundary, so that changes which would normally need no application must be applied for. B&NES uses its directions to protect the character and outlook of sensitive parts of the city.
The council's published examples are small external items, and roofs are not among them, and we do not know of any direction in Bath that covers roof coverings. That is a point to confirm rather than assume. What can be said safely is that some streets in Bath do have Article 4 directions, so you should check before you start. B&NES publishes a policy map of the areas affected, and you can ask the council by email or phone.
Why does this matter if the direction does not mention roofs? Because a direction can cover alterations to a building's front elevation or other work that connects to a roof job. A dormer on a front slope, a new chimney or a change that affects the street scene can be caught even where re-covering is not. The wording of the actual direction for your street is what counts, so read it or ask.
An Article 4 direction does not mean you cannot do the work. It means you need to make a planning application for something that would otherwise be allowed automatically.
Do not assume the absence of a direction means the absence of a rule. Conservation areas and listing have their own controls, covered next. For one more piece of Bath context, see our page on World Heritage roofs.
Conservation areas, the World Heritage Site and listed buildings
Bath has three overlapping layers. Bath was inscribed as a UNESCO World Heritage Site in 1987, and the inscription takes in all of Bath. The city-wide conservation area, first designated in 1968, covers roughly half of the city. And around 5,000 buildings are listed by Historic England. Being in the World Heritage Site does not itself add a roof permission, but it is the reason the council looks closely at appearance, and it sits behind the conservation and listing rules.
Conservation areas
In a conservation area the council has extra control over demolition and over some alterations, and it expects work to preserve or enhance the character of the area. For a roof that mostly means materials and appearance. Re-covering in the same material is the low-risk route. Swapping natural slate for an artificial one, or stone tiles for concrete, is a change to take up with the planning officers at B&NES before ordering anything. Village appraisals nearby agree: the Freshford and Sharpstone one calls concrete re-covering a marked detraction.
Listed buildings
Where the house is listed, B&NES wants to hear from you ahead of any work whatever. Consent can be needed where historic fabric or appearance changes, such as with a different covering, a rebuilt stack or a reworked dormer, and acting without it is a criminal offence. The conservation team takes enquiries at conservation_andplanning@bathnes.gov.uk.
Planning and listed building consent can both be needed on the same job. Apply for what the council tells you, and keep the decision notices, because a future buyer's solicitor will ask for them.
The B&NES route, and what to do outside it
If your house is in Bath or B&NES, the route is straightforward. First, establish your status. Is the house listed, is it inside the conservation area, and does an Article 4 direction cover your road? The council's online maps and listed building pages show this, and the Planning Portal shows the national picture.
Second, describe the job in everyday words with photographs: what is being done, to which part of the roof, in which materials. For listed buildings and sensitive roofs, ask for pre-application advice or a written view before you commit. Planning queries can go to development_management@bathnes.gov.uk, and Building Control is at building_control@bathnes.gov.uk or on 01225 477517.
Third, pick your Building Regulations route: B&NES itself, or a private approver on the register. Where the roof work is notifiable, we deal with the Building Regulations side as part of the job and tell you what has been notified.
Fourth, keep the paperwork. Decision notices, completion certificates and the guarantee all go into one folder that stays with the house. Add the quote, the invoice and the before and after photographs too, and our roofing guarantee page shows the kind of handover paperwork worth asking any roofer for.
Outside B&NES the same questions apply, but a different council answers them. Within 30 road miles of Bath you may be under Wiltshire, Bristol City, South Gloucestershire, North Somerset or Somerset Council. Each publishes planning and building control guidance on its own site, and the procedure for listed buildings and conservation areas is the same in principle even where the local policies differ.
If in doubt, ask. A short email to the right council, with photographs and a sentence on what you plan to do, usually settles it before any cost has been incurred. Further guidance on what roofing services we cover starts from our home page.
