Yes, and very few people can stop you. There's one listed building. There's no conservation area. There are no scheduled monuments. In Yorkletts, the ground has more say over your plans than the heritage officer does.
Historic England's list covers exactly one building in Yorkletts, at Grade II. There are no Grade I or Grade II* buildings. Listing means any change to that building's fabric, inside or out, needs listed building consent on top of any planning permission. It affects one household. Everyone else is free to argue with the council about their own extensions without a conservation officer weighing in as well.
The neighbours are clearly getting on with it. Planning records for the surrounding area logged 2,130 applications between April 2024 and June 2026, and 947 in the most recent twelve months. The extensions, loft conversions and new windows behind those numbers show that altering a house is a normal part of life here rather than a battle. The planning noticeboard is busier than the bus stop.
The real constraint is underground. On the British Geological Survey's shrink-swell hazard scale, 100% of Yorkletts postcodes reach class 3, the top class recorded here. Clay swells when it's wet and shrinks when it's dry, and buildings on top of it move with it. For an extension, that means deeper foundations than a builder might price for on firmer ground. It also means getting a structural engineer's view before the plans are finished, and taking a hard look at any trees near the new footings. It isn't a reason to panic. It's a reason not to hire the cheapest quote.
In practice, an unlisted house outside a conservation area has the full set of permitted development rights. Many single-storey rear extensions, loft conversions and outbuildings can go ahead without a planning application, within national size limits. Check the rules against your plans, and check whether an earlier permission on the property removed those rights, before the builder arrives. With so many bungalows here, going up into the roof is the obvious move, and the planners aren't the main obstacle to it.
The freedom to change your home is one of Yorkletts' real strengths. The heritage rules barely apply, so the planning part is easy. The engineering is what needs the care.