The two systems: conservation areas and listed buildings
Horsham’s historic core is protected by two separate but overlapping systems, and roofing work interacts with both. It is worth understanding the difference, because they carry very different legal weight. A conservation area is a designated zone — Horsham has several, including the town centre and The Causeway — where the general character is protected. A listed building is an individual building on the national register, protected in its own right, inside and out.
The practical consequence for a homeowner is this: in a conservation area, most like-for-like roof repair is still permitted, but changes to the roof’s appearance are controlled. On a listed building, the bar is far higher — almost any work affecting the building’s special character, including work to the roof, chimneys and even the mortar, can require formal consent before you touch it.
Listed building consent is required for any works of alteration, extension or demolition that affect the special architectural or historic interest of a listed building — and this expressly includes roofs and chimneys. — Planning (Listed Buildings and Conservation Areas) Act 1990
When roofing work needs listed building consent
If your property is listed, assume that most roofing work beyond genuine like-for-like repair will need listed building consent, and check before starting. Re-roofing in a different material, changing the tile or slate type, altering the roofline or pitch, adding rooflights, rebuilding or removing a chimney, and even repointing a chimney in the wrong mortar can all fall within scope. Straightforward replacement of a handful of slipped slates with matching reclaimed slate usually does not — but the line is not always obvious, which is exactly why you check with the conservation team first.
The critical point that catches homeowners out is that listed building consent is separate from planning permission. You can have permitted-development rights for a piece of work and still need listed building consent for the same work because the building is listed. The two run in parallel, and getting one does not cover the other.
Why this matters: it is a criminal offence
This is the part that homeowners and, frankly, some roofers do not take seriously enough. Carrying out unauthorised works to a listed building is a criminal offence, not a civil planning matter. The local authority can prosecute, and can serve a listed building enforcement notice requiring you to reverse the work — to undo an inappropriate re-roof or rip out cement pointing and redo it in lime, at your own cost.
Unauthorised works to a listed building are a criminal offence carrying potentially unlimited fines, and the local authority can require the works to be reversed by enforcement notice. — Planning (Listed Buildings and Conservation Areas) Act 1990, s.9
This is why we will not carry out controlled work on a listed building in Horsham until the consent position is confirmed in writing. It protects you from prosecution and enforcement, and it protects us. A roofer who is happy to crack on with a listed re-roof without checking consent is exposing you to a criminal liability you may not even know exists.
Article 4 directions and permitted development
Even where a property is not listed, a conservation area can carry an Article 4 direction. This is a formal removal of some or all of the normal permitted-development rights within that area, and Horsham District Council uses them to protect the character of specific conservation areas. Where an Article 4 direction is in force, work that would be permitted development anywhere else — certain roof alterations, for instance — needs a formal planning application instead.
This is why you cannot simply assume that because a piece of roofing work is normally permitted development, it is automatically fine in a Horsham conservation area. The only reliable way to know is to check the specific designation and any Article 4 direction that applies to your street. Our general planning permission for roofing guide covers permitted development in more depth.
How the consent process works
A listed building consent application goes to Horsham District Council and is assessed by the conservation and heritage team. A well-prepared application includes a clear description of the works, the materials to be used (matching reclaimed slate, Horsham Stone, lime mortar of a specified grade), method statements where relevant, and photographs of the existing condition. The better the application, the more likely it is to be granted first time rather than sent back for more information.
This is where a roofer experienced in heritage work earns their place. We can supply the material specifications, method information and photographic survey a conservation officer expects to see, and we liaise with the council’s heritage team directly. Many authorities offer a pre-application advice service, which is well worth using on anything beyond the routine, because it flags problems before you have committed to a design or a timescale.
Local planning authorities must have special regard to the desirability of preserving a listed building and its features when determining consent — so applications that demonstrate matching materials and sympathetic methods fare best. — Planning (Listed Buildings and Conservation Areas) Act 1990, s.16
Practical advice for Horsham owners
If you own a period property in Horsham and are planning roof work, the sequence is simple. First, establish whether the building is listed and whether it sits in a conservation area with an Article 4 direction — the council’s planning records will tell you. Second, if either applies, treat consent as the first step, not an afterthought once the scaffold is booked. Third, use a roofer who understands lime mortar and traditional materials and is willing to work to the specification the authority requires.
Consent takes time — typically eight weeks for a straightforward application, longer if it is contentious — so build it into your programme. A leaking listed roof still needs making safe urgently, and emergency make-safe to prevent damage is generally acceptable, but the permanent repair must respect the consent process. Rushing ahead without consent to save a few weeks is the single most expensive mistake you can make on a listed building. Our heritage roofing service handles the whole process.