Heritage · Planning
Listed Building Consent: A Guide for London Homeowners
Listed buildings need consent for many alterations, inside and out. This guide explains what is protected, the risks of unauthorised work, and how to prepare a sensitive proposal.
What listed building consent is
Listing protects a building of special architectural or historic interest. Where a building is listed, listed building consent is required for works that would affect its special interest — which can include a wide range of internal and external alterations. The consent is separate from planning permission, and a project may need both.
Why internal work may matter
Listing protects the whole building, not just the front elevation. That means interior features — staircases, plasterwork, joinery, fireplaces, layout and even later additions of interest — can be protected. Removing an internal wall, altering a staircase or changing historic windows can therefore require consent, even though similar work in an unlisted home would not.
Difference between planning permission and listed building consent
Planning permission addresses development and its effect on the surroundings and amenity. Listed building consent addresses the impact of works on the building’s special interest. They are assessed under different tests, and a project that needs both must satisfy each. Listed building consent is not charged a fee in the way planning applications are, but it demands a careful, evidenced case.
Drawings and heritage statements
A listed building consent application typically requires detailed existing and proposed drawings and a heritage statement explaining the building’s significance and the impact of the proposal. The quality and clarity of this information matter, because the authority and its conservation officer assess harm against public benefit. We prepare the drawings and coordinate the heritage statement through specialist partners where needed.
Risks of unauthorised work
Carrying out works to a listed building without consent is a criminal offence and can lead to enforcement action requiring the work to be reversed. It can also create serious problems when selling the property. For these reasons it is essential to confirm what consent is needed before any work — including seemingly minor internal changes — is carried out.
How to prepare a sensitive proposal
The best approach is significance-led: understand what makes the building special, identify which elements are sensitive, and design change that minimises harm and favours reversibility and repair. A clear, well-evidenced case, supported by good drawings and a heritage statement, gives a proposal the best reasonable prospect — though, as with all heritage matters, consent cannot be guaranteed.
Frequently asked questions
Do I need consent for internal work to a listed building?
What happens if previous owners did unauthorised work?
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