Yes, and with less standing in your way than almost anywhere else in the South Hams. No conservation areas fall inside the mapped area. No scheduled monuments either. Twenty-one listed buildings, and not one of them above the lowest grade. A town that did most of its growing in the late twentieth century has very little past to protect, which is bad news for the postcard and good news for anyone who wants a bigger kitchen.
Those 21 listed buildings are all grade two. There are no grade one entries and no grade two star entries anywhere in the area. Grade two is the workaday tier of the list, and it still means listed building consent for anything affecting the building's character, inside as well as out, including work that would need nobody's permission on the house next door. Most of the entries sit out in the surrounding farmland and hamlets rather than in the middle of the town, so the odds of buying one by accident are low. The odds of buying one on purpose and then discovering what the windows cost are a separate matter.
People here alter their homes constantly, and the planning register shows it. Between April 2024 and June 2026 the area logged 484 planning applications, with 208 of those falling in the last twelve months. That is a steady stream of householders queueing up to do exactly what you are thinking about doing, in a town where the plots are generous enough to make it worth the paperwork.
The ground is worth one check before the architect gets excited. About 4% of the area's postcodes have a recorded mine entry within 500 metres, with the nearest recorded working about 294 metres away, and none of the town's postcodes sit directly over one. This is old Devon metal and clay country rather than coalfield, and none of the area falls within a coalfield consultation zone. Where a property does sit near a recorded working, the practical consequence is a mining search during conveyancing and possibly a specialist report, and it can shape what a lender or insurer asks for. It is a piece of due diligence, not a warning.
For most houses in the town, extending is a matter of ordinary householder rules rather than heritage argument. Rear and side extensions and loft conversions often proceed under permitted development rights within the standard national limits, and anything beyond those goes in as a normal householder application alongside the 208 others filed in the last year. The one thing worth checking on a newer estate is whether the original consent stripped out permitted development rights, because plenty of late twentieth century developments were signed off on exactly that condition and the seller will not think to mention it.
Freedom to alter your own house is one of the genuine strengths of this town. There is no conservation area boundary to argue across and no heritage officer waiting on the other side of it, and the only real constraint most owners will meet is the size of their own plot.