Kettering is one of Northamptonshire’s fastest-growing towns, and its new estates raise the same two questions again and again: does a new build come with enough solar, and is adding more worth it? The 2026 answers, straight.
New homes and solar in 2026: the rules moved
The 2026 update to Building Regulations Part L expects new homes to carry meaningful on-site generation — sized against the dwelling, not a token panel or two. In practice many developers fit the minimum that complies; the roof usually has room for more. If you are buying off-plan, ask the developer exactly what kWp is being installed and what the roof could take — the delta is your opportunity.
Retrofitting a young roof is the easy case
A post-2015 Kettering roof is about the simplest solar install there is: sound structure, modern membrane, simple planes, no surprises for scaffolding. Adding to a developer-fitted array or fitting a first system typically lands £4,000–£10,000 at 0% VAT until 31 March 2027 — and new-build owners are exactly who battery storage suits, pairing with a time-of-use tariff from day one (from £3,500 with Fox ESS). Local detail on our solar panels Kettering page.
The county picture
Kettering sits under North Northamptonshire Council; grants context, the two-unitary picture and the A14 commercial corridor live on our Northamptonshire page. Exported units earn through the Smart Export Guarantee — rates tracked in the SEG guide.
Frequently Asked Questions
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Increasingly yes — the 2026 Part L rules expect real on-site generation on new homes — but developers often fit the compliant minimum. Ask what kWp is installed versus what the roof could take; topping up a young roof is a straightforward job.
Usually yes — a retrofit battery (from £3,500) works with most developer-fitted arrays, and we confirm inverter compatibility at the free survey. On a time-of-use tariff the battery earns even on cloudy days.
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