Listed buildings

A list entry describes why a building is significant, but the protection is not limited to the features named in the description. Case law and established practice treat the whole building — inside and out, above and below ground, and often attached or curtilage structures — as potentially within scope.

Grade I, II* and Grade II all carry the same consent requirement in principle; grade tends to affect the level of scrutiny and the weight given to preserving historic fabric, not whether consent is needed at all.

The list below is illustrative, not exhaustive — the local conservation officer and the current Historic England guidance are the authority on any specific case.

Removing a chimney breast, forming a new opening in a solid wall, or inserting a steel beam to open up a room are all structural interventions that historic buildings tolerate differently from modern ones. Solid walls built without a cavity or damp proof course often carry load in ways that are not obvious until they are opened up, and traditional foundations — where they exist at all — can be shallow, irregular or absent under internal walls.

This is why structural work in a listed building almost always needs a structural engineer with experience of traditional construction, in addition to Listed Building Consent for the work itself. The engineer's design and the consent process run in parallel and both need to be resolved before a start date is set.

Traditional buildings were generally built to breathe. Lime mortars, lime renders and lime-based plasters let moisture move through the wall and evaporate; cement-based equivalents trap it, which is one of the most common causes of damp, spalling stone and frost damage in older buildings after well-intentioned but wrong repairs.

Matching stone type, coursing, tooling and mortar colour is expected on visible repairs, and conservation officers will often ask for sample panels before full works are approved. New openings — doors, windows, rooflights — need to relate to the building's proportions and historic pattern, which is a design question as much as a construction one.

Excavating close to a listed building — for a new drain run, a soakaway, underpinning or a new extension foundation — carries risks that do not apply to modern construction: shallow or absent original foundations, buried archaeology, and walls that rely on the surrounding ground for lateral support.

Drainage solutions also need care. A modern French drain or land drain run hard against a solid wall can change how moisture moves through the fabric. Getting drainage away from a historic wall without damaging it, and without disturbing anything that might be archaeologically significant, is a specific skill that should sit with the design team before groundworks price a job.

Listed Building Consent applications are generally supported by measured drawings, a heritage statement and, for more sensitive work, a photographic or written record of what exists before it is altered. This record protects everyone: the authority can see what is proposed against what is there, and the owner has evidence of condition if a dispute arises later.

For construction pricing, the same drawings and survey information that support the consent application are usually what a contractor needs to quote accurately — see What to send your contractor for the full list.

A Listed Building Consent application is made to the local planning authority, usually alongside or instead of a planning application depending on the works. Applications are normally supported by existing and proposed drawings, a heritage statement setting out the significance of the building and the impact of the proposal, and photographs of the affected areas. For sensitive works, the authority may ask for sample panels of stonework, mortar or render to be approved on site before the wider job proceeds.

Consent conditions are common and can control the sequence of work, the source of materials, or require a watching brief during excavation where archaeology is a concern. These conditions are legally binding, and starting before they are discharged can invalidate the consent — so the condition wording needs reading as carefully as the decision itself.

Listed building projects rarely run in a straight line. Consent has to be granted (and any pre-commencement conditions discharged) before certain works can start, a structural engineer's inspection may reveal further scope once fabric is opened up, and specialist materials — matched stone, lime products, bespoke joinery — often carry longer lead times than modern equivalents.

Building this into the programme from the outset avoids the common trap of pricing and booking a start date as if the job were a standard extension, then losing weeks waiting on a condition discharge or a stone order.

Older buildings were often built without a damp proof course, with shallow strip or rubble foundations, and sometimes directly onto or partly into the subsoil. Modern services — new drainage, an extension foundation, an external tap — dug close to that fabric can undermine it if depths and clearances are not checked first, and trial holes are frequently the only reliable way to find out what is actually there before design commits to a route.

Where an extension or a new drainage run has to tie into a listed building, the junction between old and new construction is usually the most technically demanding part of the job, and it is worth pricing and programming as such rather than as an afterthought to the main works.

SHS is the contractor, not the planning authority. What SHS can do is look at a listed property from a build point of view — access, ground conditions, levels, drainage, foundations and buildability — and tell you plainly what the construction side is likely to involve.

If drawings already exist, send them. If they do not, a site visit and a conversation usually establishes what information you need to gather next and who you need it from.