Extending in Exeter is a negotiation, not a decision. There are 808 listed buildings in the area. Twenty conservation areas. Twenty scheduled monuments on top of that. A city that has been continuously occupied since the Romans laid out a fort has a great deal it does not want you touching, and a surprising amount of it is somebody's ordinary terraced house.
Of those 808 listed entries, 22 are grade one and 71 are grade two star, with the remaining 715 at grade two. Grade two is the tier that catches normal homes rather than cathedrals, and it is not a light-touch designation. Listing covers the whole building, inside as well as out, so replacement windows, internal walls, staircases and even some fittings need listed building consent before anything is unscrewed. Doing the work first and applying afterwards is an offence rather than a paperwork slip, which is a distinction people discover in the least convenient way. The grade one and grade two star entries are effectively museum-grade, and buying one means accepting you are a custodian with a mortgage.
The 20 conservation areas are the wider net, and they catch far more households than the listing register does. Alphington, Taddyforde, St David's, Longbrook, Cowick Street and Topsham all carry designations, alongside the city centre and the Georgian streets around it. Being in one does not freeze your house, but it does bring extra control over demolition, over work to trees, and over anything that changes the look of the street. The practical effect is that alterations which would be waved through elsewhere become an application here, and the council gets a view on materials rather than just on volume.
The 20 scheduled monuments are the strictest tier of the lot, protecting sites rather than dwellings, including stretches of the Roman and medieval city walls and the underground passages beneath the streets. For most buyers they are irrelevant. For anyone buying land or a property adjoining one, they change what can be dug, let alone built.
None of this stops people altering their homes, and the volume proves it. Exeter processed 3,788 planning applications between March 2024 and June 2026, with 1,640 of them in the most recent twelve months. That is a city where alterations happen constantly. It is also a city where alterations go through the front door of the planning office rather than around the back under permitted development.
Three listed buildings in the area sit on Historic England's Heritage at Risk register. That is a condition assessment rather than a warning to neighbours: buildings on the register are in poor repair, may attract grant support toward putting them right, and will attract close attention from the conservation officer when anyone tries. Living near one is not a problem. Buying one is a project with a committee attached.
The working assumption to bring here is that permitted development rights are a starting position rather than a guarantee. Outside the designated areas, in the post-war housing that makes up most of the city, ordinary rear extensions and loft conversions behave normally. Inside them, check the designation before you make an offer, not after, and treat any listing entry as a conversation with the conservation officer rather than a footnote.
Freedom to alter a home is Exeter's weakest suit by a distance. The city sells you two thousand years of protected fabric, then quite reasonably expects you not to redesign it.