A Victorian terrace has a long back slope of slate and a loft room that needs more light than one small window can give. The street is in a conservation area, and a neighbour once told the owners that nothing can be done to a roof there. That is not what the designation says. It says that the council must pay special attention to the character and appearance of the area, and a rooflight is judged against that, as one small alteration among many.
What decides the outcome is the detail. A slim unit that lies close to the slates, on a slope that is hardly seen from the street, is a different proposal from a large raised frame on a front elevation. This guide goes through the questions in the order they come up, from the rules that apply to the whole area, to how you find out what applies to your house, to the drawing that goes to the council. Nothing here replaces the council's own answer, which is the only one that counts.
What a conservation area changes
A conservation area is an area of special architectural or historic interest, designated by the local planning authority because its character is worth keeping. It can be a village centre, a run of streets, a harbour front or a group of estates. The boundary is drawn on a map, and it can follow property lines in ways that are not obvious from the street. Two neighbouring houses can sit on opposite sides of it.
The designation does not freeze buildings. It adds a layer of scrutiny to work that would change how the area looks, and it brings extra controls on things such as felling trees and demolishing buildings. For roofs, the effect is that the council asks whether a change keeps or improves the character of the area, and it looks hardest at what can be seen from public places.
A conservation area is different from a listed building. Listing protects a single structure, inside and out, and a rooflight on a listed house needs its own consent; our answer on listed building consent for a rooflight explains that route. A house can be both listed and inside a conservation area, in which case both sets of rules apply. If the house is in a National Park as well, our guide to rooflights in the New Forest and South Downs describes that extra layer.
Permitted development in a conservation area
Most rooflights on houses are allowed under national permitted development rules, without an application. Those rules, and the conditions that go with them, are set out in full in our planning permission guide, which is the one place we state them. Read it first, because everything below assumes you know the basic position.
A conservation area changes that position in two ways. First, it counts as land where some householder rights are reduced, so the rules for the exact kind of work you want should be read against the area, not the general rule. Second, a council can remove permitted development rights altogether through an Article 4 direction, and conservation areas are where directions are most often made. A common target is the roof slope that faces the street, because it is the most visible part of the building.
A third source of limits is a planning condition attached to an earlier permission. Houses on newer estates, or those that were created from a conversion or extension, sometimes have rights removed by condition. You will not see this from the street. It sits in the decision notice for that development, which the council holds on file.
We do not state which streets have directions or conditions, because we cannot see the council's records for you and the position changes. What we do is read the council's published position for the house we are quoting on, pass it on, and name the council to ask. The decision is theirs, and where there is any doubt the safe route is a formal enquiry, covered below.
What officers usually look for
A planning officer reading a rooflight proposal in a conservation area is asking one question: does this alteration sit comfortably in the roofscape? Several smaller questions feed into it, and they are worth answering in your application before they are asked.
- Position. A rear or inner slope is usually easier to defend than a front slope or a slope seen from a road, a footpath or a green.
- Projection. A unit that lies close to the plane of the roof looks like part of it. A raised kerb looks like an addition.
- Size. A small unit in proportion to the roof is easier than a wide one. Several smaller units in a regular pattern can be read as more modest than one large one.
- Frame. A slim, dark frame that reads as a thin line against slate or tile attracts less comment than a thick or bright one.
- Glazing bars and proportion. Councils often like to see a unit that echoes the vertical or horizontal bars of a traditional roof light. Our answer on whether a glazing bar is needed covers the practical side.
- Materials around it. The slates or tiles around the opening should be re-laid neatly and in the original pattern.
Councils usually publish a conservation area appraisal that describes what they value in each area, and some publish a management plan or design guidance for roofs. These are the documents the officer will quote back to you. Reading them is the quickest way to find out how a particular council thinks.
The look of the product matters as well as its dimensions. Products designed for this kind of setting are described on our conservation rooflights page, and our comparison of conservation rooflights and standard roof windows explains the differences an officer is likely to notice.
Checking your address
Checking costs nothing and takes an afternoon at most. The aim is to answer three things: is the house inside a conservation area, is it listed, and do its permitted development rights still apply. Each has a place to look.
- Conservation area. Look at the planning pages of your council's website for an interactive map or a list of designated areas. The relevant authority is the district, borough or city council, or the National Park Authority if the house is inside a Park. Historic England publishes guidance on conservation areas if you want the background.
- Listing. Search the National Heritage List for England for your address, or ask the council. A listing covers the whole building, and sometimes outbuildings and walls in the grounds.
- Article 4 directions. Ask the council's planning or conservation team whether any direction covers your property, and whether it concerns roofs. They keep a record of each direction and the buildings it applies to.
- Conditions. If the house or extension is recent, ask for the decision notice of the original permission and read the conditions.
The Planning Portal has guidance on householder applications and on the certificate of lawfulness, which is a formal way to confirm that a proposed rooflight is lawful without an application. It is worth considering when the position is unclear, because it gives you a document you can show a buyer later.
When we visit, we look up the position for your house and report it back to you. If a direction or a condition applies, we say so before any money is spent. We can also give you the product details the council will ask for. Whether permission is needed is the council's decision, not ours.
The drawing and the specification
If the check shows that an application is needed, or you want a lawful development certificate for certainty, the council will ask for drawings. A neat set is the best advocate for a modest proposal. Officers read many applications, and clear drawings with obvious dimensions are easier to approve than vague ones.
The usual set includes a location plan, a block plan, existing and proposed roof plans showing where each unit sits, and elevations or sections that show how the unit sits against the slates or tiles. A section through the roof at the rooflight is particularly useful, because it shows the projection, which is the dimension most likely to be queried.
What the specification should say
The maker's data sheet and our written quote give you the facts to draw from. Describe the unit by its model, its frame material and colour, and its overall and glazed sizes. State how far it projects above the roof surface, the type of flashing, and how the covering will be dressed around it. If the council is likely to care about the glazing bar or the proportions of the glass, show them.
Your architect or designer normally prepares the application, and we supply the product information for it. The council may attach conditions to an approval, such as a requirement to match the existing slates. Those conditions are best discussed ahead of ordering, since they can affect the unit chosen.
Ordering once consent is in
Order against the decision, not against the hope of one. A rooflight is made to measure, and the unit named in the approved drawings is the unit to buy. If a condition requires a change, such as a different glazing bar pattern or a darker frame, the order should reflect it, so the delivery matches the paperwork rather than what was first sketched.
Once the approval or the certificate is in hand, the order goes in against the programme of the roof. If the opening is part of a wider build, the dimensions go to the builder in writing while the roof is still being framed. If the roof is already finished, the existing slates or tiles are lifted, set aside and relaid around the new frame, so the finished roof reads as one.
The quote states the lead time and the unit, and the order confirmation fixes the delivery date, which we pass to you and to the roofer. The roofer comes first, then the electrician if the unit is electric, then the plasterer for the reveals. Our page on working with your builder describes the exchange of paperwork.
Keep the approval, the approved drawings and the product data together with the house papers. A later buyer's solicitor will want to see them, and a future owner will find them useful when the time comes to replace the glass.
Conservation area questions
- Can I put a rooflight on the front slope of a house in a conservation area?
- It depends on whether your permitted development rights have been removed and on how the council reads the street. A front slope is the most visible, so it is the most closely examined. Ask the council before you commit, and use a low-profile unit if you proceed.
- Will the council insist on a particular colour or bar pattern?
- Some do, as a condition of approval or as stated in their design guidance. A slim dark frame with a central bar is a common request on traditional roofs. We can supply the details that show what the unit looks like.
- Is a replacement rooflight treated differently from a new one?
- Replacing a rooflight with a similar one in the same place is usually a smaller matter than adding a new opening, though a listed building is treated differently. If the new unit is a different size or design, mention it to the council.
