Old Portsmouth reads as flats and terraces packed onto old streets down by the water, the kind of density that comes from a place built long before cars, now filled with students, young professionals and a fair number of long-term residents who never left. At over 5,400 people per square kilometre, it's more than double the national average density, and you feel that in the narrow pavements and the way the pubs and independent shops spill into the street. This is a walking neighbourhood, whether you want it to be or not. The property market here tells its own story: leasehold flats dominate, making up around two-thirds of tenure and the large majority of sales, with terraces a distant second. A For Sale board here is overwhelmingly likely to be a flat sale, not a house, and that shapes who buys in — first-time buyers, downsizers, landlords, rather than families hunting for a garden. Prices sit close to the national median and slightly below the wider Portsmouth authority figure, so this isn't an expensive corner of the South East, even though the region around it runs pricier. The schools picture is interesting rather than simple: the payload shows independent heavyweights like The Portsmouth Grammar School and Portsmouth High School GDST alongside St Jude's CofE Primary, plus the University of Portsmouth itself, so the area's educational character leans towards choice and academic reputation rather than a single catchment story. Transport is where you need to look twice — the only rail entry here is Southsea Hoverport, which tells you this pocket is oriented around the water and the city centre on foot or by bus rather than a mainline commute. Green space is generous for a place this packed — 12 sites totalling nearly 49 hectares, above the national rate per head — so there's genuine relief from the density if you know where to look, even without a single park name to hang it on. The area carries an A grade for environment and another A for nightlife, and that combination matches what you'd expect from a historic waterside quarter with a student population and a drinking-and-dining scene that doesn't shut down early. Healthcare and affordability sit more in the middle of the pack, both landing at C+, which is worth noting alongside the more flattering grades elsewhere — this isn't an area where every box ticks the same way. Safety is the one to sit with: crime runs meaningfully higher than the Portsmouth authority average, with violence and sexual offences accounting for well over a third of incidents, though the trend direction is recorded as improving rather than worsening, and the five-year signal matters more here than any single year's headline count. Put together, this is a compact, characterful slice of the city that suits people who want to live somewhere dense and social rather than quiet and residential — happy in a leasehold flat, comfortable walking everywhere, drawn to the pubs and the water rather than a garden and a driveway. Anyone weighing it up should treat the safety figures as a genuine factor to research further, not a footnote, while recognising that the direction of travel is stated as improving rather than static.