Yes, and with less argument than most of Cornwall puts you through. There is no conservation area here at all. A short list of buildings is listed, and if yours is not on it, the heritage rules belong to somebody else. Neighbours are putting applications in steadily. The thing that lengthens the process here is not the planning department. It is what sits under the garden.
Thirteen buildings in the area carry a listing: one at Grade I, one at Grade II star and the remaining eleven at Grade II. Listing attaches to a specific building rather than to a boundary drawn around a neighbourhood, so it catches a handful of addresses and leaves everything else alone. If the house you are buying is one of them, listed building consent sits on top of ordinary planning permission, it reaches inside the property as well as outside, and the work becomes slower and more expensive by design. If it is not one of them, none of that touches you.
Three scheduled monuments sit within the area. That is the strictest protection tier in the system, attached to specific sites rather than to housing, so it matters if your land runs up against one and is otherwise somebody else's constraint.
The live evidence is in the planning register. Between April 2024 and June 2026, 811 applications were lodged across the wider area, 348 of them in the twelve months to June 2026. People here alter their houses, and they do it constantly. What that volume does not tell you is how any individual application landed, so read it as proof of appetite rather than as an indication of your odds.
The ground is where the attention belongs. About 79% of postcodes here have recorded abandoned mine workings nearby, and 6 postcodes sit directly above a recorded working. In practice that means a mining search as standard, possibly a specialist report on top of it, and a lender or insurer wanting to see what came back. None of that predicts subsidence or implies a house is unsafe. It means the paperwork runs longer and the survey costs more, which is a scheduling problem rather than a structural one. The wider ground classifications are mild by comparison: shrinking and swelling clay, compressible ground, running sand and soluble rock all sit in the lowest published band, with landslide potential no higher than the second.
For an ordinary house here, the ordinary rules apply. Permitted development covers a good deal of what most people want from a rear extension or a loft, and anything past it goes in as a planning application the same way it would anywhere. With no conservation area in the area, the extra layer of control that comes with living inside one simply does not apply. The two checks worth making before you commit are whether your specific address appears on the listed register, and what the mining search says.
Freedom to alter a house is one of the stronger things Roche has going for it: no conservation area, a short listed list, and a queue of neighbours already building. Whatever you save on heritage consultants, put it towards the mining report.