For most homes in Ashchurch, yes, and with less fuss than in most villages. Only a handful of buildings are listed. There's no conservation area. Most of the houses are recent. The planning register shows the neighbours are already busy with their own extensions.
Historic England lists nine buildings in the Ashchurch area. None is Grade I, one is Grade II* and eight are Grade II. Listing covers the inside as well as the outside, so on those nine almost any change, from a window to an internal wall, needs listed building consent from the council on top of any planning permission. There's no conservation area and no scheduled monument, so that extra layer of control stops at those nine front doors. Everywhere else, the history is somebody else's house.
Plenty of people do alter their homes. Between April 2024 and June 2026, 897 planning applications were logged in the area, 416 of them in the most recent twelve months. That's a lot of paperwork for a village of semis and detached houses, and it means whatever you have in mind, a rear extension, a loft, a garage conversion, has already been put in front of Tewkesbury Borough Council by someone nearby. Your neighbours have probably already formed their views about rear extensions, so expect to hear them when the site notice goes up.
For an unlisted house, many smaller extensions and loft conversions can go ahead under permitted development, the national rights that let householders build within set limits without a full application. Anything bigger, or anything outside those limits, goes to the council as a normal householder application. One check matters more here than in an older village. Much of Ashchurch was built in the 2000s, and a planning consent for a newer estate can carry conditions that remove permitted development rights. The original consent for the house, on the council's planning register, will show whether yours still has them.
Extending a home is one of the easier things to do in Ashchurch. Unless your house is one of the nine, the rules are the standard ones and nothing extra applies.