Read this before you book slate work in a conservation area. It separates what the national rules still allow from what a council direction can take away, and names the councils whose published wording touches roofs.
Living in a conservation area does not freeze a roof. A slipped slate can still be put back, a worn valley can still be relined and a tired slope can still be re-slated. What changes is the number of questions to ask before the work starts, and who is best placed to answer them.
Two sets of rules sit side by side. The first is national: the permitted development rights that let a householder alter a roof without applying for planning permission. The second is local: an Article 4 direction, which a council can use to withdraw some of those rights across a defined area. A conservation area does not always come with a direction, and a direction does not always reach the roof.
This guide takes the national rule first and the local ones after, council by council, from the Thanet coast to the Swale towns and the Dover district. It belongs to our slate roofing work. For the conditions that attach to roof alterations, the guide to planning permission for a slate roof gives the detail, and the page on listed building slate roofs picks up where a house is listed as well as sitting in a conservation area.
Class C does not stop at the boundary
Class C of the General Permitted Development Order is the class for roof alterations that fall short of a dormer. A house owner who swaps one covering for another is normally working inside it. Article 2(3) of the Order names the places where some rights are removed, and a conservation area is one of them.
The effect is narrower than people expect. Land under article 2(3) loses Class B, the class for dormers and roof extensions. Class C carries no article 2(3) exclusion. So a re-slate on a house in a conservation area starts from the same position as a re-slate anywhere else. Dover District Council's conservation area page makes the Class B side plain, listing building roof dormers among works that need permission in a conservation area.
Flats are a separate case. A flat has no permitted development rights, and Canterbury City Council's guidance is that a flat whose appearance from outside is being altered needs planning permission. That applies inside a conservation area and outside one.
Where the national rule does apply, the questions that matter are short:
- Is it a house, or a flat in a converted building?
- Is the work a repair with a matching covering, or a new material?
- Does a council direction reach the roof on the side facing the street?
Those three answers decide how firm the ground is and whether a letter to the council comes first, and a few minutes spent on them at the start spares a good deal of delay once the scaffold is booked.
Article 4: where a direction reaches the roof
Government guidance says an article 4 direction lets the Secretary of State, or the local planning authority, take specified permitted development rights away across an area it defines. A direction is a council's decision about its own patch, so two conservation areas in the same district can be treated differently. Whether a direction touches a roof depends entirely on what the council wrote into it.
The councils publish very different amounts. Swale and Dover say enough about roofs to describe, while for Thanet, Canterbury, Folkestone & Hythe and Ashford the safe advice is to ask.
| Council | Conservation areas | Article 4 and the roof |
|---|---|---|
| Thanet | 27 | Ramsgate, Ramsgate Marina extension, Pegwell: ask the council |
| Canterbury | 97 | Council map: ask |
| Dover | 57 | Roof alteration on road, waterway or open-space sides |
| Swale | 51 | Faversham: front roof coverings |
| Folkestone & Hythe | See council map | Ask the council |
Thanet District Council has Article 4 Directions covering three conservation areas, those of Pegwell, Ramsgate and the Ramsgate Marina extension. Its page lists the addresses but leaves the classes unstated, so the working advice is to check with Thanet District Council. Canterbury City Council shows its directions on a map. For Folkestone & Hythe, the council's interactive map is the place to start, followed by a question to the planning team. Ask for the answer in writing, and ask which map or document it refers to.
Faversham and Dover: the two that name roofs
In Faversham, Swale Borough Council's direction takes in replacement doors and windows as well as roof coverings, wherever the principal elevation fronts a public highway. The principal elevation is the main face of the house, the one that fronts the street. On a house in that conservation area, a new covering on a front slope is therefore a matter for Swale before it is a matter for the roofer. Swale's Article 4 page lists the full set of directions, and the borough-wide direction made on 21 July 2026 concerns houses in multiple occupation rather than roofs.
Dover District Council explains that roof alterations to a dwelling can fall within a direction, wherever that part of the home faces a road, a waterway or open public ground. Kingsdown, Nelson Street, Dour Street, Middle Street in Deal and Sandwich each have directions of their own.
The wording is the thing to read. A direction confirmed for Sandwich on 27 January 1998 is not the same document as one confirmed for Kingsdown on 5 September 2016. We ask the council which direction applies to your address, and which elevations it names, before the specification is written.
A rear slope that nobody sees from a road raises a different question from a front slope on a terrace, and the council's answer should say which, so the specification for each slope of the roof can follow it.
Thanet: why like for like is easier
Thanet District Council's conservation area page offers the clearest local guide for a repair: it says like-for-like work lowers the chance of needing a planning application. The wording promises odds, not an outcome, but it is a sensible starting point for slate repairs on streets in Margate, Cliftonville, Ramsgate or Broadstairs.
The same page lists 27 conservation areas. Margate's was designated on 7 February 1978 and extended on 7 July 1994. Broadstairs was designated on 5 June 1970, Ramsgate on 16 January 1970 and Westgate on Sea on 11 March 1998. Cliftonville has several, including Dalby Square in 2010 and Clifftop and Northdown Road in 2016. Those districts sit in different corners of the council area yet share one piece of guidance on like-for-like work, so an owner in Westgate on Sea or Birchington gets the same advice as one in Margate.
The Thanet appraisals also describe the roofs. The Clifftop appraisal calls its roof materials quite mixed, with natural slate beside red clay tile, and adds that tall chimney stacks survive in a number of locations. The appraisal for Northdown Road mentions slated and tiled roofs, many concealed behind parapets, with fishscale slates on some.
The repair that matches is therefore the one least likely to start a conversation. Reuse the sound slates, match the rest for size and colour, and keep the fixings in sympathy with the old roof. Our guide to matching old slates goes through how that works on the roof itself.
What we check before pricing a conservation area roof
The survey in a conservation area is the same survey as anywhere else, with extra entries in the notes. On the roof we check the slates, ridge, valleys and lead flashings, photograph what we find for you, and then add the questions the address raises.
- Which council area the house is in, and what that council publishes on conservation areas.
- Whether an Article 4 direction names the street, and which elevations it reaches.
- The type of work: a repair, a matching re-slate or a different material.
- Whether the house is also listed, which brings in listed building consent.
- Whether the roof belongs to a flat, which has no permitted development rights.
Repair or re-slate is the next question. A few slipped slates, one failed valley or a tired ridge can often be put right on their own, and a repair that matches is also the lightest touch on the street. A strip becomes the better answer where failure runs right across a slope, or the nails and battens underneath are spent. Our guide on re-slating or repairing sets out how that call is made.
If a conservation area is anywhere near the address, we put the question to the council in writing and pass its answer to you, so the scaffold date rests on something firm and not on an assumption.
That written answer is filed alongside the survey photographs, which helps if the house is sold later.
Scaffold, building control and the written total
Planning is one route. Building control is another, and the body that runs it differs from place to place. Thanet runs its own team and points to the Planning Portal's test. Canterbury and Swale use STG Building Control. Dover and Folkestone & Hythe each keep their teams in house, and Ashford Borough Council has its own Building Control team. The Planning Portal test is less than 25 per cent of the building envelope and also less than 50 per cent of the roof. Separately, a covering that is 15 per cent or more heavier needs approval.
Dover District Council treats replacing a roof covering as work needing building control approval even when it is like for like; that applies to Dover addresses only.
The scaffold is the part with a clock on it. Section 169 of the Highways Act 1980 is the source of the scaffold licence, which Kent County Council grants. Under Kent County Council's process the scaffolding company makes the application, giving 5 working days' notice, at £52 per week for 2026 to 2027. In a conservation area with narrow streets, that date is booked early.
When the survey, the council's answer and the building control route are all in hand, we write one total price on paper. It reflects the route that was settled, not a guess made before the council had replied.
Say plainly what the work is: a repair, a matching re-slate or a new material.
