A plain English walk through of when roofing work is permitted development, when building regulations bite, and how conservation areas and listed status change the answer.
Planning permission is about what a building looks like and how it affects its surroundings. Building regulations are about whether the work is structurally sound, thermally adequate and safe. A job can need one, both or neither.
Confusing the two causes most of the trouble. A like for like re roof rarely needs planning permission but can still engage building regulations, and homeowners are sometimes told the opposite.
Re roofing an existing house
Replacing a roof covering with the same or a similar material is normally repair and maintenance, so planning permission is not usually required. Changing to a materially different material, for instance concrete tiles on a house that has always been slate, can require permission and often will in a sensitive area.
Building regulations apply where more than 25 per cent of the roof area is being renewed, at which point the thermal performance is expected to be improved where it is reasonably practicable. That usually means insulation as part of the work.
Structural changes, dormers and loft conversions
Anything that changes the roof shape, such as a dormer, a hip to gable conversion or raising the ridge, is development and normally needs either permitted development confirmation or a planning application. Volume limits and restrictions on front elevations apply.
Loft conversions always need building regulations approval, covering structure, fire escape, stair design and insulation. That is a building control matter regardless of whether planning permission is needed.
Conservation areas and listed buildings
Across Witney, Burford, Woodstock, Oxford and the Cotswold villages, conservation area status is common. Permitted development rights are restricted, materials are scrutinised and the local authority will normally expect a match to the existing.
On a listed building, listed building consent is required for work affecting its character, and that includes roof covering, chimneys and rooflights. Carrying out work without consent is a criminal offence, so this is one to check before anyone quotes. Our conservation areas and listed buildings guide covers the practical side.
Party walls, neighbours and evidence
Work at or near a shared boundary, including cutting into a party wall for a flashing chase or working on a shared roof of a terrace, may fall under the Party Wall etc. Act 1996 and require notice to your neighbour.
Keep the paperwork. Building regulations completion certificates, planning decisions and consents are all asked for when you sell, and reconstructing them years later is far harder than filing them at the time.
Does replacing my roof need building control?
If you are renewing more than a quarter of the roof area, yes, the work is notifiable and the thermal element is assessed. Your local building control body or an approved inspector handles it.
Can I change from tile to slate on my house?
Sometimes, but a material change in appearance may need planning permission, particularly in a conservation area. Check with the local planning authority before committing.
Does a like for like flat roof replacement need permission?
Normally no planning permission, though building regulations may apply to the insulation if it is a full replacement over a heated space.
Who applies for approval, me or the roofer?
The homeowner is legally responsible, but a competent contractor will tell you what is needed and can help with the notification. We flag it at quotation stage rather than after the scaffold goes up.
What happens if work was done without approval?
A regularisation application through building control is the usual route, and indemnity insurance is sometimes used at sale. Listed building breaches are more serious and need proper advice.
Not sure what your project needs?
Tell us what you are planning and we will tell you where the permission questions sit before you spend anything.
Evans Roofing & Maintenance Ltd, Witney, Oxfordshire. Call 07960 482233 for a free written quote.