Lead Roof Repairs on a Listed Building

Listed buildings are protected so their special architectural or historic character survives. Section 7 of the Planning (Listed Buildings and Conservation Areas) Act 1990 makes it unlawful to carry out works that change a listed house's special interest unless someone has authorised them. That authorisation is listed building consent, and the council grants it.

Plain repair is treated differently. On its listed buildings page the South Downs National Park Authority describes regular maintenance and minor in-situ repairs matching the original as needing no listed building consent. Swapping a failed flashing for fresh lead matching the old, laid the same way, is the clearest example. Swapping lead for another metal, changing the layout of the bays, or altering the profile of a roll or drip is not, because each of those changes how the roof looks and is built.

The line between repair and alteration is a judgement, and it belongs to the council, not the roofer. In doubt, ask your council's conservation or planning officers, or the South Downs authority where the house lies in the National Park, before work starts. Put the question in writing, describe the lead as it is now, and keep the reply with the house papers.

Lead for roofs is made in more than one way, and the way matters on an old building. Royston Lead's brochure covers cast lead, a traditional sheet, and lists it by code from Code 3 to Code 8. A repair on a listed roof should match what is already there: the same kind of sheet, a code of similar weight, the same way of joining it. A thinner or lighter sheet may look the same on day one but wear differently, and it may not be what the conservation officer expects.

Before ordering, find out what is on the roof now. Look at the edges of the existing sheets, at the rolls and drips, and at old repairs, which often show a patch of a different age. Our survey notes the layout and the code where it can be identified, and we share photos so you and the council have the same evidence.

The specification then goes in the written quote: the lead, the code, the fixings and the pattern of joints. Our guide to lead sheet codes helps you read it.

Listing does not switch off every other rule, and it does not switch on all of them. The permitted development rules for roofs contain no listed-building exclusion, so a listed house keeps those rights, but listed building consent is needed on top where the work affects its character. The two systems run side by side.

Other designations can apply to the same building. A house in a conservation area or inside a National Park or National Landscape sits on land where some permitted development rights are limited, and the council can tell you whether a local Article 4 direction removes more. We do not assume what covers your street.

Churches in use follow a separate route. The ecclesiastical exemption can replace listed building consent for churches in use, with the denomination's own approval process instead, and it does not cover everything. If your building is a church, ask the diocese or denomination first.

Take dated photographs before, during and after the work as well. Whatever the building, keep copies of every decision, because a future buyer's solicitor will ask for them, and so may a surveyor.

A sensible order is to survey, decide what is like-for-like, ask the council in writing about anything that is not, and only then fix a price. A listed roof often has old fixings, uneven decking and past repairs, so the survey looks closely at what lies under the lead, not just what is showing. Thieves also target lead on old buildings, and our page on lead stolen from a roof covers what to do if that happens.

Access on a listed building needs planning too. Scaffold over a public footway needs a highway authority licence, which we deal with alongside the scaffolder. Old masonry also needs care, so ask where the ties will go and how they are protected.

After the survey comes one total price in writing. For a first look, send the building's age, its listing grade if you know it and a photo of the leak, and we will say what we want to check on the roof. For the wider service, read about our lead work, and for a common fault, why lead flashing cracks.