Almost certainly, and with far less argument than most of Portsmouth. Seventeen buildings in the whole area are listed. One conservation area. The rest of it is post-war suburban housing that nobody is protecting from a rear extension. The main obstacle here is the clay under the garden, not the planning department.
Listing is the constraint that stops a project dead, and it barely applies here. There are 17 listed buildings across the area: none at grade one, 2 at grade two star, and 15 at grade two. Listing covers the whole building inside and out, so anything from a new window to an internal wall needs listed building consent on top of any planning permission, and the answer is often no. Seventeen buildings out of an entire suburb means the odds of buying one are slim, but check the specific address rather than assuming, because the ones that are listed tend to be the interesting old properties buyers fall for.
There is a single conservation area in the vicinity, at Hilsea Lines. Conservation area status strips out some of the permitted development rights that apply everywhere else, which in practice means changes to the front elevation, roof alterations and anything visible from the street get looked at properly rather than waved through. Outside that one boundary, none of it applies.
Two scheduled monuments sit within the area's bounding box. That is the strictest protection tier in the system, and it matters only if you are buying land adjacent to one, in which case anything involving groundworks becomes a longer conversation than you were expecting.
The live evidence is better than any theory about what the council might allow. Planning applications across the area ran to 1,483 between April 2024 and June 2026, with 698 of those in the most recent twelve months. That is a lot of people extending, converting lofts and adding rear returns, and it tells you the process here is a routine one rather than a battle. What happened to each of those applications is not something the published data reports consistently, so treat the volume as evidence that people do this, not as a promise about your own.
The ground is the part nobody checks and everybody should. The British Geological Survey puts shrink-swell hazard here at class three, and the whole area reaches that class. Shrink-swell describes clay soils that expand when wet and contract when dry, which moves foundations over seasons rather than overnight. For an extension it means deeper foundations than a standard specification, attention to nearby trees, and a structural engineer's input at design stage rather than after the first summer. It is a cost line and a design constraint, not a reason to walk away, and every extension already built here dealt with the same soil.
One listed building in the area sits on Historic England's Heritage at Risk register, meaning it is in poor condition. For its owner that opens the door to grant support and guarantees close scrutiny of any work. For anyone buying an ordinary house nearby it means nothing at all.
For the vast majority of properties here, permitted development rights are intact and the usual limits on depth, height and coverage are what governs the project rather than any local designation. Check whether your specific address falls inside the conservation area, check whether it is one of the seventeen, then get a structural engineer to look at the soil.
Freedom to alter a home here is middling in the technical sense and generous in the practical one: the paperwork is straightforward for nearly everyone, and the thing that will actually shape your extension is what the clay does in August.