Solar on a Listed Hotel Without Consent — What Section 9 Says

Fitting solar panels on a listed hotel without listed building consent is a criminal offence, not a planning irregularity that can be tidied up afterwards. That is the single fact that should sit at the top of every heritage hotel’s solar plan, and it comes straight from the statute rather than from installer marketing. This post sets out what the law says, in its own words, and what it means for the way a consent application is sequenced — the practical route is in our guide to solar panels on listed buildings.

The offence: section 7 and section 9

The Planning (Listed Buildings and Conservation Areas) Act 1990 makes listed building consent the control on works to a listed building. Section 7 prohibits works of demolition, alteration or extension that would affect the building’s character as a building of special architectural or historic interest unless consent has been granted. Section 9 turns a breach into an offence. The wording, as in force on 23 September 2026 (legislation.gov.uk states the section “is up to date with all changes known to be in force on or before 23 September 2026”):

“If a person contravenes section 7 he shall be guilty of an offence.” — s.9(1)

Section 9(2) makes it a further offence to fail to comply with a condition attached to a listed building consent. Both matter for solar: the first catches an array fitted with no consent at all; the second catches an array that departs from the approved drawings — a different panel colour, a different roof slope, a frame that sits higher than the consented detail.

The Planning Portal puts the same point in plain language on its listed building consent page: “It is a criminal offence to carry out work which needs listed building consent without obtaining it beforehand.”

The penalties: section 9(4) and 9(5)

The penalties are set out in section 9(4), and they run to imprisonment as well as a fine:

“on summary conviction, to imprisonment for a term not exceeding six months or a fine, or both” — s.9(4)(a)

“on conviction on indictment, to imprisonment for a term not exceeding two years or a fine, or both” — s.9(4)(b)

Section 9(5) is the provision an operator should read twice, because it ties the fine to the money the works were meant to save:

“In determining the amount of any fine to be imposed on a person convicted of an offence under this section, the court shall in particular have regard to any financial benefit which has accrued or appears likely to accrue to him in consequence of the offence.” — s.9(5)

For a solar array, the “financial benefit” is the energy saving the panels deliver. A court is directed to take that into account when setting the fine, which removes the argument that an unauthorised array is a cheap risk because the panels can always be taken down later.

The fee: there isn’t one

Against that, the consent itself costs nothing to apply for. The Planning Portal’s listed building consent page states: “There is no fee for an application for listed building consent.” A combined application — where planning permission is also needed, for example because the array is on a building that also falls outside permitted development — still carries the planning fee on the normal scale, but the listed building consent element is free.

That combination — no fee to apply, a criminal offence and a benefit-linked fine for not applying — is why the consent step belongs at the front of a heritage hotel programme, in parallel with the DNO application, rather than being treated as a formality after the installer has been chosen.

What this means for sequencing a listed hotel’s solar project

1. Establish the listing and the curtilage first. Section 7 applies to the listed building and, in most cases, to structures within its curtilage — the stable block, the coach house, the walled-garden outbuilding that often turns out to be the best solar roof on a country-house estate. Do not assume an outbuilding is outside the consent regime.
2. Apply before ordering equipment. The application is free; the offence is committed by carrying out the works, not by proposing them. Nothing goes on the roof until the decision notice is in hand.
3. Build to the consented detail. Section 9(2) makes a departure from the conditions an offence in its own right. Panel type, colour, frame height, the roof slopes used and any cable routes should match the approved drawings exactly, and any change goes back to the authority.
4. Run the DNO application in parallel. A hotel-scale array is a G99 project on any UK network, and the DNO study is normally the longest item in the programme. The two consents can and should run at the same time.
5. Where consent is unlikely, change the site, not the process. Front elevations of Grade I and II* buildings are the hardest case; rear slopes, valley roofs, outbuildings and ground arrays screened from the principal views are where consents are more commonly granted. The listed building solar guide covers the siting options and the conservation-officer conversation; the wider hospitality solar panel installations guide covers the programme around it.

Sources

• Planning (Listed Buildings and Conservation Areas) Act 1990, section 9 — legislation.gov.uk, checked 26 September 2026 (in force to 23 September 2026).
• Planning Portal, listed building consent guidance — “There is no fee for an application for listed building consent”; “It is a criminal offence to carry out work which needs listed building consent without obtaining it beforehand” — checked 26 September 2026.

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If your hotel is listed, start with the consent position rather than the panel count. Free desk feasibility from a recent electricity bill, with the listed building consent route set out before any site visit — get a free hotel solar quote.