What needs listed building consent?

The basic principle

Section 7 of the Planning (Listed Buildings and Conservation Areas) Act 1990 requires consent for works of demolition, alteration or extension that affect the character of a listed building. The listing covers the whole building (interior and exterior) and any object or structure fixed to it, plus any object or structure within its curtilage that has been there since before 1 July 1948. There is no division by grade: Grade I, II* and II are all subject to the same regime.

External works

• Windows and doors: replacement, alteration of opening size, change in glazing pattern, change of material.
• Roofs: re-roofing where the material or pattern changes, new rooflights, dormer windows, chimney removal or alteration.
• Extensions: rear, side or roof extensions of any size.
• External finishes: render, paint colour, replacement of historic pointing or stucco.
• Boundaries: alteration or demolition of boundary walls, railings and gates that form part of the listing.
• Shopfronts: any alteration to a historic shopfront on a listed building.

Internal works

Listed building consent applies in full to interiors. Common internal works that need LBC:

• Removal or alteration of original or early joinery (doors, architraves, skirting, panelling, staircases).
• Removal or insertion of partitions and changes to plan form.
• Removal or alteration of fireplaces, cornices, ceiling roses and decorative plasterwork.
• Insertion of new bathrooms, kitchens or service runs through historic fabric.
• Stripping historic paint, removal of historic wallpaper or wall coverings.
• Floor finishes where the original or early floor is exposed or affected.
• Insertion or replacement of staircases.

Services and renewables

Modern services often need LBC because the routing affects historic fabric:

• Heating systems where new pipework is chased into walls or floors.
• Electrical rewiring with new chases or surface conduit.
• Insulation, internal wall insulation in particular.
• Solar panels, ground source heat pumps and air source heat pumps.
• Air conditioning and mechanical ventilation.
• Replacement of secondary glazing where it affects window joinery.

Repair vs alteration

Strict like-for-like repair, matching materials, matching profile, matching technique, does not need consent. The line is fact-specific. Replacement of a rotten sash with a new sash made to the same pattern in the same timber is repair. Replacement with a uPVC sash is alteration. Re-pointing in lime mortar to match the original is repair; re-pointing in cement is alteration that has caused refusal more than once. Where there is doubt, an LBC application or a written opinion from a heritage consultant is the safe route.

Curtilage and outbuildings

Pre-1948 curtilage structures are part of the listing. This includes garden walls, gates, mews buildings, coach houses, garden ornaments and outbuildings that were in place before 1 July 1948. Their demolition or alteration needs LBC. Curtilage is a fact-specific test set out in case law (Attorney General v Calderdale BC and subsequent cases).

Demolition

Demolition of any part of a listed building needs LBC. This includes partial demolition, removal of internal walls, removal of chimney breasts and removal of curtilage structures. Substantial harm to a listed building through demolition triggers NPPF paragraph 207 and the test of substantial public benefits (or the four limbs of paragraph 208).

Consequences of unauthorised works

Carrying out works that need LBC without it is a criminal offence under section 9 of the 1990 Act. The offence is one of strict liability: ignorance of listing or of the consent requirement is not a defence. Penalties include unlimited fines and, in serious cases, imprisonment. Local planning authorities can serve a section 38 listed building enforcement notice requiring restoration. Mortgage lenders, buyers and insurers routinely require evidence that works were lawful.

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