You’ve no doubt seen the ads on social media websites about how installing solar panels has never been easier, or cheaper. And in many ways, that’s true. You’re probably also painfully aware of rising electricity costs, and a push for renewables on our changing planet.

The summer sun might make these systems seem like an attractive investment, but when it comes to heritage roofing, there are significant considerations that go beyond simple energy savings. 

The truth is, if you own a historic or listed property, going solar is far from straightforward. 

There’s so much to consider, even before we get to Historic England and conservation groups. The visual impact on your building’s character, the potential damage to historic materials, and of course strict planning regulations, all play a part in determining whether solar panels are a viable option.

Historic England and heritage roofing specialists generally advise caution when altering traditional roofs beyond their original state.

While solar technology can sometimes be integrated, the process requires careful planning, expert consultation, and more often than not, formal consent.

Still interested in going solar? Then let’s look at the factors to consider before proceeding, from legal restrictions to practical maintenance, so we can answer the question; is it worth installing solar panels on a historic roof?

Listed buildings and solar panels

The first and most important consideration for owners of listed buildings is whether listed building consent is required. In most cases, installing solar panels on a listed property will need approval, because any alteration to the roof could affect the building’s historic character.

Historic England’s guidance is clear: while solar panels are not outright banned on listed buildings, they are only permitted where they do not harm the significance of the structure.

An assessment will focus on visibility and impact. If the panels can be installed on a rear roof slope or outbuilding where they are less obtrusive, consent might be more likely. 

But if the proposed installation would alter the appearance of a principal elevation or impact original roofing materials, permission is often refused. 

Some conservation areas also have additional restrictions – which means that even non-listed, but still historic properties may face hurdles.

If you’re determined to proceed, then early engagement with the local planning authority is essential. A solid, complete application (supported by heritage statements and detailed drawings showing minimal visual impact) can improve your chances of approval. 

But it’s worth noting that some councils are simply reluctant to permit solar panels on prominent historic roofs in just about any case. Some local areas depend on their historic charm to attract visitors, investors, and business – if that’s lost to a sea of solar panels, then what’s left to conserve?

Does historic roof maintenance change with solar panel installations?

How do solar panels affect the long-term maintenance of a historic roof?

Well, traditional roofing materials, like Kent peg tiles and slate, need routine care – and adding PV systems can complicate access for repairs. The weight of solar panels and mounting systems needs to be assessed, to avoid structural damage or water ingress.

One of the biggest concerns is the risk of trapped moisture. 

Historic roofs often rely on breathability, and if solar panels are installed without adequate spacing, they can create low airflow areas where damp accumulates – leading to timber decay, tile deterioration, issues with freeze/thaw, and more problems besides.

Proper installation should include plans for ventilation, using raised mounting systems that allow air to circulate beneath the solar panels.

Cleaning and inspecting your historic roofing will also become more challenging with solar panels. Key parts of the roof might be harder to access – meaning routine maintenance tasks (like clearing gutters and removing leaf litter) can take longer, or require specialist care.

Make sure you factor in these additional costs when you’re weighing up the benefits of solar energy.

Is it even worth installing solar panels if you value aesthetics?

This might be a sweeping statement, but we think that most owners of period properties have specifically bought them for their character and how they look; not for their energy efficiency.

The visual impact of solar panels isn’t worth it for quite a lot of people who own historic buildings. The contrast between traditional materials and modern PV solar arrays can be more than a little bit jarring. 

There are alternative solutions, like solar slates. They mimic traditional roofing materials, and offer a more discreet option – blending in pretty seamlessly with real slate. They tend to be less efficient and more expensive than conventional panels, but do offer the option for 100% coverage, which more than makes up the efficiency shortfall.

Ground-mounted solar arrays or solar tiles on outbuildings are also a decent compromise – helping you generate renewable energy without affecting your main roof. So, even if you’re dead against altering your historic building (or your assessment doesn’t allow you to proceed), then there might still be ways of benefiting from solar energy on other parts of your property

Heritage versus sustainability

Installing solar panels on a historic roof isn’t always impossible – but it does always require careful thought and expert advice. For many owners of heritage properties, a willingness to compromise and a flexible approach are what you’ll need more than anything else.

Before making a decision, we recommend that you consult a historic roofing specialist and your local authority, to assess the specific circumstances of your property. Start the process through the Planning Portal, and be accurate and truthful – because it can land you in some big legal trouble if you don’t!

But above all, it will help you make an informed choice and proceed in a way that respects both the past and the future.

Historic Roofing Experts Since 1984

Get the advice and help you need, from our experienced team of heritage roofing experts. For a quote or consultation, call 01233 860301 or contact us at [email protected].