Why Beaconsfield and Gerrards Cross homes overheat
Houses here were built generously, and in a heatwave that generosity works against you. The big detached homes across HP9 and SL9 — mock-Tudor and interwar houses set well back on their plots — tend to have wide, sun-facing living rooms and tall windows onto the garden. A large glazed room collects heat all afternoon and holds it long past bedtime, and the bigger the room, the longer it takes to shed that heat on its own. A fan doesn't touch it; it just stirs warm air around.
A properly installed split system does sort it — and because a modern split is a reversible air-to-air heat pump, it heats the same rooms efficiently in winter too. One local caveat: Beaconsfield Old Town has period and listed stock, and parts of both towns sit in conservation areas. Before an outdoor unit goes on an external wall, check with the council rather than assuming — a good installer treats that check as part of the job, not an afterthought.
Sort the electrics first
Before anyone prices units, it's worth knowing what's behind your fuse board. Even substantial houses round here can be running on an older consumer unit, and a split system — like an EV charger or a battery — wants modern electrics behind it. An EICR (an electrical condition report) typically costs £150–£300 and tells you where you stand; some older homes need a new consumer unit before taking on AC load. Our guide on whether your electrics can handle air conditioning covers it plainly — and if solar and a battery are on the list too, it pays to sort the electrics once, properly.
What it typically costs
For one hot room — a south-facing main bedroom, say — a wall-mounted split typically comes in around £1,500–£3,000 fitted. In houses this size, a multi-split covering three or four rooms is common, typically £3,500–£7,000 depending on the layout and pipework. The full cost guide has the honest detail.
And an honest note: we're just opening in Beaconsfield and Gerrards Cross, so there's no local installer network here yet — we're onboarding vetted installers now. Register your interest and we'll match you with one as the area comes online. We won't hassle you with calls in the meantime.