Do you need planning permission for a pitched roof?

Planning control only bites on development, and section 55 of the Town and Country Planning Act 1990 excludes any work that leaves how the building looks materially unchanged. Stripping a roof and putting back matching material in a matching colour sits comfortably inside that exclusion, which is why ordinary re-roofing seldom reaches a planning officer's desk.

Two caveats travel with it. The first is a listed building, where consent is a separate system covered below. The second is an Article 4 direction, a council order that withdraws chosen permitted development rights across a defined area. Where a direction applies, work that would otherwise be left alone may need an application.

Where the line gets blurred

Swapping natural slate for concrete tiles, or clay for a modern profile, can change how a house looks from the road. Deciding whether a change goes too far belongs to the council, not the roofer, and the sensible time to ask is before the order goes in rather than after the roof is finished. A different colour, tile size or surface texture on a house in a protected area is the clearest case for a call.

Planning permission and Building Regulations are different systems, with different tests and different officers. A roof can need one and not the other, and owners often assume that an answer from one settles the other. Our page on planning permission to replace a roof covers the re-roofing side more fully, and the last section here deals with Building Regulations.

If you are unsure, photographs of the roof and the street frontage, with the address, are what the council's planning team will ask to see first.

Once a job alters the form of the roof, different rules apply. Class C in Part 1 of Schedule 2 to the General Permitted Development Order 2015 is the catch-all for roof alterations on a house, and it is where roof windows live. It carries two main limits. Nothing may stand proud of the original slope by more than 0.15 metres, and nothing may rise above the existing top of the roof.

The second limit matters on a pitched roof. Lifting a ridge, raising a bungalow's roof to make a loft bedroom or building up a taller gable all take the roof past its present height, so they fall outside what Class C offers. Such a job needs the planning team's view on the right route, and often a planning application.

Roof windows in the side slopes

Class C also sets a condition for side-facing slopes. Windows there must use obscured glass and be fixed shut, with one relief: opening sections are allowed only if they sit higher than 1.7 m from the floor. The frosted glass is compulsory on every side-slope window; the 1.7 metre figure only excuses the fixed-shut rule. Our guide to planning permission for skylights goes through the rest.

Dormers and flats

Dormers fall under Class B, which caps the added volume at 40 m³ for terraced houses and 50 m³ for other houses. Those rights do not exist on what the Order calls article 2(3) land, which takes in conservation areas, National Parks and Chichester Harbour National Landscape. Flats are left out altogether, because the Order's wording leaves out a flat, and any block made up of flats. Our page on dormer roofs explains the build itself.

A conservation area does not stop you re-roofing. It raises the bar on appearance, and in some places it comes with an Article 4 direction. Roof work there is a conversation with the council before it is a purchase from a merchant.

Arun District Council's guidance shows what officers look for. In its Aldwick Road conservation area, designated in July 1994, slate roofs have often given way to modern interlocking concrete tiles, and the council says this spoils the appearance of the terraces and the street; it wants the first materials put back. In The Steyne and Waterloo Square area, first designated in August 1979 and extended in July 1994, the stated aim is to undo modern replacements in favour of natural slate or plain clay tiles. Both are guidance rather than rules, and each tells you what the council hopes to see on your roof.

Article 4 directions near Bognor

Arun's directions around Bognor are not about roofs. One concerns houses in multiple occupation in parts of Littlehampton and Bognor Regis, and the other, at Craigweil House in Aldwick, concerns enclosing verges and paving front gardens. Neither takes away a roof right. Elsewhere the picture differs. In Langstone, Havant Borough Council's direction reaches roof alterations on the front of a house facing the road, with a roof light as its example. In several Portsmouth conservation areas, directions reach the replacement of roof cladding on a main elevation facing a road.

Whether a direction touches your street is for your own council to confirm, and a short enquiry before you order tiles costs nothing. Our guides to changing tiles in a conservation area and heavier roof tiles and the regulations add the practical side, from choosing a match to the weight check.

For a listed building the system moves from permission to consent. Section 7 of the Planning (Listed Buildings and Conservation Areas) Act 1990 bars any alteration that would affect the building's special architectural or historic character unless it has been authorised, and a roof is usually a large part of that character.

The South Downs National Park Authority makes a practical point: regular upkeep and small like-for-like fixes carried out in place do not call for listed building consent. A full re-covering, or a change of material, is another matter, and you should ask before you start. Our page on re-roofing a listed building sets out what to prepare for the application.

Places of worship

Churches in use follow routes of their own. A Church of England parish uses a faculty application. Catholic, Methodist, Baptist and United Reformed buildings can be exempt too, each using its denomination's approval process, and the Baptist exemption holds only where specified trust corporations own the building. Unitarian, Quaker and other faiths are not exempt, so they apply to the council for listed building consent. Once worship stops, or the building goes to the Churches Conservation Trust, the exemption is lost and ordinary secular controls apply.

Consent for work to a scheduled monument, including one in a churchyard, comes from the Secretary of State whatever the denomination. The worship exemption does not cover planning permission, so a change to the outside of a listed church can still need it. Most owners never meet these rules, but a village chapel conversion or a church hall can bring them in.

Which council handles an application depends on where the house stands. In the Wealden, Lewes, Mid Sussex, Brighton and Hove, Horsham, Adur and Worthing and Arun portions of the South Downs National Park, the Authority is the planning decision-maker itself. In the East Hampshire, Winchester and Chichester portions, the district council deals with the application for the Authority. Building control inside the Park stays with the district council throughout.

Arun District Council's conservation area page adds that the National Park is responsible for conservation areas inside the Park. If your house is near the boundary, find out which side of the line it falls on before you ring anyone, because the answer decides whose officers you need.

Chichester Harbour National Landscape

Chichester Harbour was an Area of Outstanding Natural Beauty from 4 February 1964 until the 2023 rebrand as a National Landscape. The planning legislation still uses the older legal term, so land inside the designation counts as article 2(3) land. In practice that removes permitted development for dormers there, as the earlier section described, but it does not remove Class C rights for roof windows on its own.

Why the place matters more than the roof

The same re-covering job can need nothing in an unprotected street and a conversation with the council in a protected one. That is why we ask for the address first and look at the roof second. Bosham, on the harbour shore, and the Downs villages are places where it pays to check at the start, because the answer can alter the choice of material, the colour and sometimes the whole approach.

Our pitched roofing page explains the work we do on tiled and slated roofs across the area.

Even where no planning permission is needed, Building Regulations may apply. To skip a building control application, the Planning Portal says, a job must stay under 25 per cent of the total building envelope and under 50 per cent of the roof. Go past either figure and an application is needed. So it is if the new covering will perform differently in a fire, if structural work is involved, or if the covering makes the roof 15 per cent or more heavier.

Arun's own building control team treats a change of roof covering as something to approve. That can look like a contradiction of the Planning Portal thresholds, but it is a difference of emphasis, and the council's team or your roofer can confirm what your job needs.

Insulation and ventilation

Re-roofing can bring the thermal element into the work. Under Approved Document L, the Part L guidance, an existing roof worse than 0.35 W/(m²·K) should be upgraded towards 0.16, and a major renovation means touching more than 25 per cent of the external envelope. The underlay you choose also affects how the roof space is ventilated, so the specification is worth reading rather than assuming. Ask which underlay is going on and how air will move through the eaves and ridge.

Our part in it

We explain which consents your job needs, handle the Building Regulations notification where the work is notifiable, and clear the site at the end. Survey photographs and a written quote come first, so you know the position before any commitment. Where a protected area is involved, ask for the council's answer in writing and keep it with the house papers for the day you sell.