Chester Cathedral’s solar panels: what a Grade I roof teaches homeowners

The project at a glance

Two public accounts describe the installation. Historic England published a case study on it in July 2024, which now sits with its Advice Note 18 on adapting historic buildings for energy and carbon efficiency. The cathedral announced the work in a news article in February 2023. Everything on this page comes from one or both of them.

In its article the cathedral described itself as the first cathedral in the north of England to install solar panels on its ancient monastic building. It also called the installation “a long-term and prominent (although not visual) commitment”, a phrase that sums up the whole approach.

Why the cathedral wanted panels

According to Historic England, the Church of England announced in 2020 targets for all parts of the Church to reach net zero by 2030, and that included looking at how the energy efficiency of existing buildings could be improved. Chester Cathedral set out to reduce its energy use and its carbon footprint by putting panels on its southern roof slopes.

The Dean of Chester gave a second reason in the cathedral’s article: cost. Sustainability, he said, includes doing everything possible to reduce the cathedral’s carbon footprint, and lower running costs leave more money for the essential work of caring for the building. Both reasons will be familiar to anyone weighing up panels on an old house.

How consent was won

The cathedral applied to Cheshire West and Chester Council for planning permission. Historic England commented on the proposals. It said the panels were unlikely to be visible from near the building, but that the cathedral would need to assess their effect on views from further away.

Cathedral staff told Historic England the process was “remarkably easy going” from start to finish, and they gave the credit to how they went about it. They had built a good working relationship with the council’s lead planning officer and conservation officer, which let them discuss the plans before submitting anything and make the changes suggested. The staff said that honest, open conversations at the pre-application stage made the process simpler and easier to navigate, because they could act on advice before applying and supply the right evidence to answer the concerns others might raise.

Those concerns came down to two things. The first was any alteration to the fabric of the building. The second was visual impact: everyone involved wanted the iconic views of the cathedral to stay unchanged.

The cathedral answered both with evidence. Architects and consultants produced a heritage impact assessment, which showed that the effect on views of the cathedral would be minimal. The designs from the architect and the structural engineer showed that the panels would make no permanent alteration to the structure. The panels went on south-facing slopes, to make the most of the sun, and in places where people cannot see them from ground level.

They are not invisible. Historic England notes that the panels can still be seen from some viewpoints in the city. The planning department considered the impact minimal all the same, because from those viewpoints the appearance of the roof simply changed from green to black. Planning permission and faculty approval were both granted in February 2021. Faculty approval comes from within the Church rather than from the council; a house has no equivalent, as the lessons below explain.

How the panels are held on

This is the part with the most to teach. The cathedral’s article describes a non-interventive design: the panels sit on the historic roofs rather than being fixed to them. A specialist designed and made a bespoke mounting system so that the lead and copper roof coverings would not be compromised, and the installation team had to work without fixing mechanically into the roof structure.

Historic England’s account adds the detail. The architect made sure that the support structure and frame did not change the copper roof covering or the wooden roof structure beneath it. Structural engineers checked that the roof could carry the extra load. The visual impact was kept down wherever possible.

The practical work had its own challenges, the cathedral’s article says: equipment had to be craned up onto the roof, the team worked to strict listed building requirements for a Grade I medieval church, and the placing of the panels was planned carefully to get as much electricity from the roof as it could give. Cathedral staff told Historic England that working with contractors who understood the building’s historic value, and why the conservation process mattered, made the installation easier.

Historic England reports that the results have been positive, with data loggers fitted to record what the panels produce.

Lessons for a Chester home

A house is not a cathedral, and a terrace in Hoole or a villa in Curzon Park will never need a crane. But the steps that worked here scale down well.

1. Know your consent route first. The cathedral needed planning permission and faculty approval. A listed house needs planning permission and Listed Building Consent from the council, because the permitted development rules in Part 14 of the GPDO do not apply to a listed home. Check whether yours is listed on Historic England’s National Heritage List. Our listed buildings guide covers the application in detail.
2. Talk before you apply. The cathedral’s smoothest step was the conversation with the planning and conservation officers before anything was submitted. A homeowner can do the same, on a smaller scale.
3. Put evidence behind the proposal. A heritage impact assessment carried the cathedral’s case. For a house, a short heritage statement does the same job: what matters about the building, what the panels would change, and why this position.
4. Choose the position for the view as well as for the sun. The cathedral used south-facing slopes that cannot be seen from the ground. On a house that might be a rear slope, a valley roof hidden behind a parapet, or an outbuilding.
5. Make it reversible. Ask how the frame meets the roof, and press for fixings that leave the roof covering and the timbers unchanged when the panels come off.
6. Check the structure. The cathedral had structural engineers confirm the roof could take the load. An old house roof deserves the same question.
7. Think about appearance as well as visibility. The planning department judged the cathedral’s visible panels as a change of roof colour. Dark panels in a tidy layout make the same argument on a house.
8. Pick people who understand old buildings. Ask any installer about their experience with listed or historic homes. Our guide to choosing an installer in Chester lists the other checks.

Where a house differs

The cathedral had a team of architects, consultants and structural engineers, and a roof large enough for 206 panels. A house application is far smaller, and so is the paperwork it needs, but the concerns are the same two that Historic England recorded here: changes to the fabric, and visual impact.

Not every house near the cathedral is listed, either. If a house in the City Centre conservation area is not listed, roof panels within the size limits are still permitted development, with tighter rules for road-facing walls and balconies and for flat roofs. Use the planning checker on our conservation-areas guide to see the route for a particular address. And to see what panels would produce on your own roof, try our Chester roof output estimator.