Lawful development certificate or listed building certificate

Two certificates sound alike. And they answer different statutes. A lawful development certificate under sections 191 and 192 of the Town and Country Planning Act 1990 confirms that something is lawful in planning terms, so no planning permission is needed. A certificate of lawfulness of proposed works under section 26H of the Planning (Listed Buildings and Conservation Areas) Act 1990 confirms that works to a listed building would not need listed building consent. If your house is listed and you are changing it, you may need to think about both.

Working out which one you want starts with the question you are actually asking. Is it about permission for development, or about consent for works to special fabric?

What a section 191 certificate proves

A section 191 application asks the council to certify that an existing use, an operation already carried out, or a failure to comply with a condition, is lawful. Lawful here means immune from enforcement action because the time limit has passed, or that it never needed permission in the first place.

That makes it the route for a conservatory built years ago with no paperwork, a garden building someone converted into an annexe, or a house that has quietly been two flats since before anyone can remember. You are not asking for permission. You are asking for a formal finding about what already is.

The immunity periods are in flux. The Levelling-up and Regeneration Act 2023 moves the old four-year rules for building works and for a change of use to a single dwellinghouse onto a ten-year footing in England, alongside the existing ten-year period for other breaches. The start date for that change, and the treatment of breaches that began before it, both need checking before you rely on a date, so confirm the current position with the council or a planning solicitor rather than working from an old note.

What a section 192 certificate proves

Section 192 looks forward. It asks the council to certify that a proposed use or proposed operations would be lawful if carried out, usually because they fall within permitted development.

This is the certificate householders use before spending money. Planning to build a large outbuilding under Class E of Part 1, or a loft conversion with a rear dormer, and worried that the council will later say it exceeded a limit? A section 192 certificate decided in your favour removes the argument. It is also the sensible answer where a lender or a buyer wants comfort.

A section 192 certificate is not permission and it does not last forever in the way a permission does. It certifies lawfulness against the rules and the facts as they stand when it is issued. Change the design, or let a new Article 4 direction come into force, and the certificate may no longer cover what you build. Our comparison of a lawful development certificate or a retrospective application sets out the choice where works are already up and the position is unclear.

The listed building route under section 26H

Section 26H was inserted into the 1990 listed buildings Act by the Enterprise and Regulatory Reform Act 2013. It lets an owner apply for a certificate that specified proposed works would not affect the character of the listed building as a building of special architectural or historic interest, and so would not require listed building consent.

That is a narrower question than it first appears. The test is about effect on special interest, not about whether the works are reversible, modest or internal. Replacing a late twentieth-century kitchen inside a Grade II farmhouse may well pass. Taking out a plaster cornice in the principal room will not, however small the area.

The point practitioners most often miss is that there is no immunity period for unauthorised works to a listed building. Carrying out works that affect special interest without consent is a criminal offence under section 9 of the 1990 Act, and no amount of elapsed time makes it lawful. A section 191 certificate cannot cure it. That asymmetry is the single most important difference between the two regimes.

Both routes also sit alongside, rather than instead of, planning permission. Listed building consent and planning permission are separate consents, and a scheme can need one, the other or both. Where the works will affect special interest, you are into a consent application supported by a Heritage Statement rather than a certificate.

Burden of proof and the evidence that works

In all three cases the burden sits on the applicant, and the standard is the balance of probability. The council is not required to go looking for evidence on your behalf.

For a section 191 application about a historic breach, the evidence that carries weight is dated and independent. Statutory declarations from people with first-hand knowledge, council tax or rating records, utility accounts, tenancy agreements, dated photographs with provenance, aerial imagery and electoral roll entries all help. A single unsupported declaration can be enough where nothing contradicts it, which is a long-standing principle, but councils test it and will refuse where the account is vague about dates.

For a section 192 application the evidence is drawings and measurements. Give the council scaled existing and proposed plans and elevations, a site plan showing the curtilage boundary, heights measured from the highest part of the adjacent ground, and a short note walking through each limit in the relevant class with the figure that meets it.

For a section 26H certificate the evidence is a description of fabric. Photographs of what is being removed or altered, a schedule of works room by room, and an assessment of significance by someone who understands building history. Councils expect a suitably qualified author for heritage work and conservation officers read these carefully.

Fees, timing and what the council does next

Fees differ by route. A certificate for an existing use or development attracts a fee equivalent to the planning application fee that would have applied, and a certificate for a proposed use or development attracts half that. Fees in England are indexed annually from 1 April, so check the current schedule on the Planning Portal rather than a figure from last year. The listed buildings regime does not charge for listed building consent itself, and the fee position for a section 26H certificate should be confirmed with the authority before you submit.

The target determination period is eight weeks in each case. Certificate applications are not usually publicised in the way a planning application is, because the question is one of law and fact rather than planning merit, so neighbour comment carries no weight.

A council can grant a certificate in different terms from those applied for, or grant it in part. That is worth knowing, because a partial certificate covering the extension but not the use may still be exactly what your lender needs.

Appeals and the practical choice

Refusal of a lawful development certificate can be appealed to the Secretary of State under section 195 of the 1990 Act, and a failure to decide within the period counts as a refusal for that purpose. The listed buildings Act provides its own appeal route against refusal of a section 26H certificate. Both are determined by the Planning Inspectorate, and because the issues are legal and factual the written representations procedure usually suits them.

So which do you apply for?

If the honest answer is that you do not know whether the works affect special interest, do not use a certificate as a shortcut. Ask the conservation officer, and budget for a consent application. You can see which supporting documents a heritage application tends to need across the full set of report types, and draft the heritage narrative before you commission the survey work. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.

This is general guidance, not legal advice. A lawful development certificate is the only formal way to confirm that works are lawful, and you should check your own position with your local planning authority or a qualified professional before relying on anything here.