When it comes to energy performance, TR21 in Isles of Scilly manages an average of 48 out of 100, placing it below the national average. Compared to the national average of 67, that puts TR21 below the norm for England and Wales. The most common rating band is E, with 5.1% of homes rated A or B and 36.3% in the C or D bands. Meanwhile, 29.4% of homes sit in the F or G bands — the least efficient categories. In practical terms, an E rating signals significant energy waste. In practical terms, households here could be spending £400-600 more per year on energy than they need to.

The area is characterised by houses. Flats make up a notable 29% of homes here. Around 47% of properties are owner-occupied , while 31% are privately rented and 22% are social housing. A significant share of homes here rely on electric heating, which tends to be more expensive per unit of energy than gas.

There is genuine room for improvement here. If every recommended upgrade were carried out, the average score could climb from 48 to 78 — a 30-point jump that would lift the typical rating to C. That is a substantial gain, suggesting many homes are missing basic efficiency measures. If you live in TR21 and want to reduce your energy bills, start with our guide to loft insulation — it is one of the most cost-effective upgrades you can make.