Usually, yes, and most of the time the paperwork will be routine. Every listed building in town is Grade II. There are two conservation areas, and one of them is a canal. Hundreds of planning applications go in every year. Where it gets harder is at the edges of town and in the few protected pockets.
Addlestone has 16 listed buildings. All 16 are Grade II, with none at Grade I or Grade II*. Grade II covers buildings of special interest, and it still means listed building consent is needed for almost any change that affects the building's character, inside or out, on top of ordinary planning permission. With only 16 of them in a town this size, very few owners will ever have to deal with it.
There are two conservation areas, Caxton Avenue and the Wey Navigation. Inside a conservation area, the council looks harder at changes to how a house appears from the street, and some work that would be automatic elsewhere needs consent. A house on Caxton Avenue is exposed to that scrutiny. The other conservation area mostly protects water, towpath and locks, and very few homes sit inside it. Find out whether a property is in either area, and whether it's listed, from Runnymede Borough Council's planning records while you're still deciding, because sellers don't always say.
The neighbours are already extending. Between April 2024 and June 2026, Runnymede's planning records logged 788 applications across Addlestone, 364 of them in the last twelve months. That's a town steadily adding rear extensions and loft rooms, and whatever you have in mind, the planning office has almost certainly seen it before.
The stock helps. Most of Addlestone was built after the war, and only about 15% of homes predate 1930, so most houses carry nothing the council treats as historic. On an ordinary semi outside the conservation areas, many single-storey rear extensions and loft conversions can go ahead under permitted development rights, the national allowance for modest work that needs no planning application. A larger or two-storey extension needs full permission. A flat has no permitted development rights of this kind, and its lease will have its own rules. The other things to look at are the green belt land around the edges of town, and the low ground beside the Bourne and the Thames meadows, where flood risk is a planning consideration too.
Addlestone sits in the middle for freedom to extend: there's little heritage to worry about across most of town, but there are enough protected pockets, green belt edges and flood-zone streets that you should check each specific house.