Yes, and a good number of people here are doing it right now, with a planning officer reading over their shoulder. Launceston is an old town that managed to keep most of itself, and towns that keep themselves come with paperwork. A couple of hundred buildings carry listed status. One conservation area sits across the middle. None of that stops the work, it just decides how long the work takes to start.
Historic England's register carries 218 listed buildings in the area: 7 at Grade I, 14 at Grade II star and 197 at Grade II. Listing is the part buyers routinely misunderstand. It covers the whole building rather than the pretty bits, inside as well as out, and consent is needed for anything affecting its character. That includes the jobs people file under maintenance rather than alteration, which is how somebody ends up with a beautiful set of replacement windows and a very awkward letter. The higher grades bring more scrutiny, but the 197 at Grade II are the ones most ordinary buyers will actually encounter, and Grade II is not the light-touch tier people assume it is.
There is one conservation area, covering Launceston itself. Conservation-area status is not the same as listing and works differently: it protects the look and feel of the place as a whole rather than any single building. In general terms that means tighter control over demolition and over work to trees, and permitted development rights are commonly narrower inside a conservation area than outside one. The practical translation is that two houses of identical age and shape can sit a few streets apart with very different answers to the same question.
Seven scheduled monuments sit within the area as well. That is the strictest protection tier in the system, and it matters mainly if your boundary happens to touch one, in which case the conversation moves to a different set of consents entirely.
None of this has stopped anybody. The planning record shows 797 applications across the area between April 2024 and June 2026, with 341 of those in the last twelve months. That is a town where altering, extending and converting is a normal weekend conversation rather than a rare event. What the record cannot tell you is how any individual case went, so treat the volume as proof that the door is open rather than as odds on your own application.
Two of the listed buildings here appear on Historic England's Heritage at Risk register. That is a statement about the condition of those specific buildings, not a warning about the street they stand on. A building on the register can attract grant support toward repair, and will certainly attract close attention to what that repair involves.
For a practical read: if the house is unlisted and outside the conservation boundary, the standard permitted development rules apply and a rear extension or loft conversion is the routine job it is anywhere else. If the house is listed, or inside the boundary, assume consent for almost everything and budget the months rather than the weekends. The single most useful thing a buyer can do is check the specific address against both the listing register and the conservation boundary before making an offer, because estate agent particulars describe the charm of a period property with far more enthusiasm than they describe its consent requirements.
Freedom to alter a home is the weakest part of living here, and it is weak for the same reason the town is worth looking at in the first place. The place survived largely intact, and intact places do not hand out permission quickly.