Yes, most people who buy in West End, Hampshire can extend or alter their home without much fuss, because the place is overwhelmingly ordinary modern housing rather than protected old stock. Only a small handful of buildings across the whole parish carry a heritage listing, and they all sit at the gentlest end of the protection scale. There are a couple of conservation areas to be aware of, but they cover specific pockets rather than the village at large. The typical West End house went up in the late twentieth century and comes with none of the paperwork that a period cottage drags behind it. For the great majority of homes here, the answer is a straightforward one.
Start with the listed buildings, because they are the ones that genuinely tie your hands. West End has just eight of them, and every one falls in the lowest listing grade, the tier used for buildings of special interest rather than national importance. If you happen to own one, the rules are strict and unglamorous: changes inside and out need listed-building consent, replacing windows or knocking through walls stops being your decision alone, and the cheap modern fixes are usually off the table. The upside is that eight buildings out of a parish this size means the odds of your target house being one of them are slim. Most buyers will never touch this problem, and the ones who do knew what they were buying.
The conservation areas are the more common thing to trip over. West End contains two of them, Gaters Mill and Romill Close, and Orchards Way, and they exist to protect the look and character of those particular streets rather than the fabric of any single house. Inside a conservation area, the freedoms you would normally take for granted get trimmed. Work that would be automatic elsewhere, such as certain extensions, cladding, or taking down a tree, can need permission it would not need two roads over. It is not a veto on changing your home. It is a requirement to ask first and to keep the result in keeping.
In practical terms, this splits West End into two experiences. Buy an ordinary house outside the listed handful and the conservation streets, which is what most people do, and your rights to extend under permitted development are the normal national ones: a rear extension, a loft conversion, or a garden room within the usual limits will often need no full application at all, though checking before you build is always the cheaper mistake to avoid. Buy inside a conservation area or a listed building and you flip into the world of consents, drawings and a planning officer with a view on your windows. The deciding factor is not the village. It is the exact address, so the sensible move is to check the planning status of a specific property before you fall for its potential.
The verdict is a comfortable middle. West End gives most homeowners real freedom to extend and improve, with only a thin scatter of listed buildings and two conservation pockets standing in the way, which is about as light-touch as English planning gets. Check the address, respect the two special corners, and for nearly everyone the loft conversion and the kitchen extension are yours to build.