The short answer: usually not for a like-for-like roof
If you are replacing a tired roof with a new one that looks much the same, you usually do not need planning permission. In England, re-roofing a house generally falls under permitted development rights, which allow certain work to go ahead without a planning application.
The main test is whether the outside of the roof will look noticeably different. Replacing worn concrete tiles with similar new tiles, or relaying a slate roof in matching slate, is normally fine. Keeping the same shape, height and pitch is what matters most.
This guide covers the common exceptions, how Building Regulations fit in and which council to speak to in Northamptonshire. It is general guidance rather than legal advice, and the rules can change, so always check with your council before starting work.
When a new roof can need planning permission
Planning permission becomes more likely when the work changes the shape, height or appearance of the roof. Common examples include:
- Raising the roof or changing its pitch, for example to create more headroom in the loft.
- Dormers and roof extensions. Many loft conversions can be done under permitted development, but there are limits on size, position and materials, and a dormer on a roof slope facing the road usually needs permission.
- Changing a flat roof to a pitched roof, which adds height and changes the profile of the building.
Permitted development rules also limit how far roof alterations can stick out from the existing roof slope. If your plans go beyond a straight replacement, speak to the council early, before you commit to a design. If you want written certainty that your project counts as permitted development, you can apply for a Lawful Development Certificate.
Listed buildings, conservation areas and flats
Listed buildings. If your home is listed, you will normally need listed building consent for work that affects its character, and that can include re-roofing, even with matching materials. Carrying out work that needs consent without getting it is a criminal offence, so speak to the council’s conservation team first.
Conservation areas. Northamptonshire has many conservation areas, from town centres to village streets. Permitted development rights are more limited in them, and dormer roof extensions are not normally permitted development there. Some areas also have Article 4 directions, which remove specific rights such as changing roof materials or adding roof lights to slopes facing the road. A change of slate or tile that would be fine elsewhere may need permission here.
Flats and maisonettes. Householder permitted development rights apply to houses, not flats or maisonettes. If you live in a flat, roof changes that alter how the building looks are more likely to need permission, and you may also need consent from the freeholder or management company under your lease.
Building Regulations are a separate question
Planning permission and Building Regulations are often confused, but they cover different things. Planning is about how a building looks and its effect on the area around it. Building Regulations are about how it is built, including structure, weatherproofing, fire safety and energy efficiency.
Even when no planning permission is needed, replacing a significant part of a roof covering usually needs Building Regulations approval. Two points are worth knowing:
- Weight. If the new covering is heavier than the old one, for example changing from slate to concrete or clay tiles, the roof structure may need checking to make sure it can carry the extra load.
- Insulation. Energy efficiency rules can require the roof’s insulation to be upgraded when a large area is re-roofed, where this is practical and cost effective. Adding insulation also means thinking about ventilation, to avoid condensation in the roof space.
The exact requirements depend on your roof, so check with Building Control at your council before work starts. Keep any completion certificate you receive, as solicitors often ask for it when a house is sold.
Which council to contact in Northamptonshire
Since 2021, Northamptonshire has had two unitary councils, and planning and Building Control questions go to the one that covers your address.
- West Northamptonshire Council covers Northampton, Daventry, Towcester, Brackley and the surrounding villages.
- North Northamptonshire Council covers Kettering, Corby, Wellingborough, Rushden and the surrounding area.
You can check whether a building is listed on Historic England’s National Heritage List for England, and your council can confirm whether you are in a conservation area or covered by an Article 4 direction. Councils often offer pre-application advice, sometimes for a fee. If you live just over the county border, such as in Market Harborough, planning is handled by Harborough District Council in Leicestershire instead.
A quick checklist before you start
Before you book a re-roof, run through these questions. If the answer to any of them is yes, speak to your council before work starts.
- Will the shape, height or pitch of the roof change?
- Are you adding a dormer or another kind of roof extension?
- Is the building listed?
- Is it in a conservation area, or covered by an Article 4 direction?
- Do you live in a flat or maisonette rather than a house?
- Will the new roof look noticeably different from the old one?
Even if every answer is no, Building Regulations can still apply, especially if the new covering is heavier than the old one or a large area is being replaced. A quick call to Building Control is worth making either way.
How Weathershield Roofing can help
Whatever your plans, we are happy to talk through the job with you before anything starts. We can look at your existing roof, discuss whether you are replacing it like for like or changing anything, and point out where it would be wise to speak to the council or Building Control first.
Where keeping the look of a street matters, such as in a conservation area, we can use slate or tiles to match neighbouring properties. Our roof installation work uses new tiles with modern under-tile membrane and insulation, and our slate roofing service covers full slate re-roofs as well as repairs.
If only part of your roof is failing, a repair may be all you need, which keeps things simpler still. See our roof repairs page, or our flat roofing service if the problem is an extension or garage roof.
We have over 15 years’ experience working in Northampton and across Northamptonshire. To talk through your new roof, call 01604 436331 or 07464 080546, or send us your details for a free, no obligation quote.
Frequently asked questions
Do I need planning permission to replace roof tiles?
Usually not, as long as the new tiles look similar to the old ones and the roof keeps its shape and height. Listed buildings, homes in a conservation area or under an Article 4 direction, and flats can be exceptions. Replacing a large area of tiles may still need Building Regulations approval, so check with Building Control as well as the planning team.
Do I need Building Regulations approval to re-roof my house?
Often, yes. Replacing a significant part of a roof covering usually needs Building Regulations approval, even when planning permission is not needed. The roof structure may need checking if the new covering is heavier, and you may need to upgrade the insulation. Building Control at your council can confirm exactly what applies to your roof.
Can I change my roof from slate to tiles without planning permission?
Possibly, but it depends on where you live and how different the new roof will look. A change that alters the appearance of the house noticeably can need permission, and in a conservation area or under an Article 4 direction it is more likely to. Concrete tiles are usually heavier than slate, so the roof structure may need checking too. Ask your council first.
Which council do I contact about planning in Northampton?
Northampton is covered by West Northamptonshire Council, which also handles planning for Daventry, Towcester, Brackley and the surrounding villages. Kettering, Corby, Wellingborough and Rushden come under North Northamptonshire Council. Both have planning and Building Control teams who can advise you before you start work on your roof.