Any works affecting a listed building’s character need listed building consent — external, internal, and often structures in its curtilage. The test is not visibility from the street; it is effect on significance. Unauthorised works are a criminal offence under Section 9 of the Planning (Listed Buildings and Conservation Areas) Act 1990, carrying unlimited fines and up to two years’ imprisonment, with no time limit on enforcement. Done well, listed consent is a design conversation leading to a better building. Done badly, it is a two-year stalemate followed by refusal.
What listed status restricts
Almost all external alterations, most internal alterations that affect historic fabric or spatial hierarchy, and often works to outbuildings and walls within the curtilage.
The three grades (I, II*, II) indicate significance, but they don’t change the consent regime — the same consent is required for a Grade II as for a Grade I. The grade affects how sensitive the officer’s judgement will be.
A common trap: internal features often carry more significance than external ones. In Georgian and Regency townhouses the stair and principal rooms are the historic core; owners routinely underestimate what would need consent internally.
The test the officer applies
Section 16 of the 1990 Act requires the authority to have special regard to preserving the building. In practice, the officer decides whether the works cause harm to significance, and if so, whether the harm is outweighed by public benefits.
The officer’s judgement is shaped almost entirely by the heritage statement. A heritage statement is not a description; it is an argument. The biggest predictor of success is not the design quality — it is the quality of the heritage statement in front of the officer.
What we deliver
- Listed building consent applications, submitted and managed
- Heritage statements written to the significance-and-harm framework
- Schedules of works with justification for each intervention
- Specification of appropriate materials, methods and craftsmen
- Curtilage assessments where the position is unclear
- Negotiation with conservation officers, Historic England and amenity societies
- Coordination with parallel planning applications
- Advice on unauthorised works and retrospective applications
How the process runs
Understand
Research the listing, history and what carries significance.
Design
Change located where significance is lowest. Every intervention justified.
Pre-app
Early conversation with the conservation officer aligns the application with their reading.
Justify
Heritage statement and schedule of works make the case in the officer’s own terms.
Consent
Submission, negotiation, conditions negotiated through to workable approval.
Standards and regulations that apply
The primary references we work from.
The primary legislation. Sections 7-9 create the consent regime; Section 16 sets the statutory test.
The framework’s heritage policy. Paragraphs 200-208 applied to every decision.
GPA 2 on significance and GPA 3 on setting.
Framework for identifying significance.
Adopted local plan policies and conservation area appraisals.
The British Standard for conservation of historic buildings.
Common questions
Does everything need consent, even inside? +
Almost everything that affects the building’s character. Some routine like-for-like repairs don’t, but the line is finer than most owners assume. We establish exactly what needs consent at the start of every project, in writing.
How long does consent take? +
Statutory eight weeks. Pre-application discussion typically adds four to six weeks up front but shortens the formal determination. Total from starting design: four to eight months on complex applications.
Can I modernise a listed building? +
Almost always, and often substantially. Kitchens, bathrooms, services and extensions are achieved in listed buildings every week. What’s not usually possible is wholesale gutting or interventions that erase the historic core.
What’s the difference between Grade I, II* and II? +
Relative significance. All three carry the same consent requirement; the grade affects how sensitive the officer’s judgement will be.
Do I need planning permission too? +
Often yes. Planning for changes of use and extensions; listed consent for works affecting character. Where both are needed we prepare them in parallel.
What if works were done without consent? +
Specific advice on the facts needed. Sometimes a retrospective application regularises; sometimes undoing the works is pragmatic. Enforcement has no time limit on listed buildings. We advise without judgement.
Can you deal with Historic England? +
Yes. HE is a statutory consultee on Grade I and II* applications and some Grade II. Where consulted, we deal with them directly.
Do listed buildings have to meet current building regulations? +
Yes, but the regulations recognise that historic buildings sometimes can’t meet current standards without unacceptable heritage harm. Reasonable provision is interpreted in light of significance.
If you own or are considering a listed building, the first consultation is free. A director will visit where practical.