The government announced earlier this year that all newly built homes in the UK will be required to include solar panels as standard from 2027. If you own an existing property, your first thought is probably that this does not apply to you. And you are right — there is no obligation on existing homeowners. But there are a few reasons it is still worth paying attention to.

The most straightforward one is what the announcement tells you about where things are heading. Governments do not make something compulsory in new builds unless they are confident the technology works, the costs are manageable, and the infrastructure to deliver it exists. Solar hitting that bar for new builds is a signal — not a legal requirement, but a signal — about what the expected standard for UK homes is becoming.

Think about double glazing. It was not compulsory in existing homes either. But once it became standard in new builds and awareness grew, homes without it started to look behind the times — and buyers started asking questions.

The same thing is likely to happen with solar, and probably faster than it did with glazing. Energy bills are front of mind for most households right now in a way they simply were not a decade ago. An EPC rating matters more than it used to. And mortgage lenders are starting to factor energy efficiency into their assessments.

There is also the timing angle. The government removed VAT from solar panels and battery storage — currently sitting at 0% until March 2027. That is not a coincidence. The VAT removal and the new-build solar mandate are part of the same push, and the VAT window is specifically designed to make the economics work for homeowners who act now rather than waiting.

On a typical installation, 0% VAT saves you somewhere between £300 and £500. It is not a huge amount in isolation, but when you are already comparing the cost of going solar versus the long-term cost of not going solar, it is not nothing either.

For anyone in an existing property who has been thinking about solar but has not got round to booking a survey, the 2027 deadline is as good a prompt as any. Not because you are running out of time — you are not — but because the window in which the numbers work especially well in your favour is narrowing.