Pontprennau and Old St Mellons
vs Rumney
Pontprennau and Old St Mellons has the younger population: 19% of residents are aged 15–29, against 17% in Rumney. Homes in Pontprennau and Old St Mellons sold for a median of £299,995, 20% above Rumney. Pontprennau and Old St Mellons has more green space nearby (27% within 500 m, against 17%).
People
Pontprennau and Old St Mellons has 11,713 residents in 4,910 households; Rumney has 8,789 in 3,603. Rumney has the higher share of residents aged 65 and over: 21%, 9.2 percentage points more than Pontprennau and Old St Mellons (Cardiff: 15%). Rumney has the higher share of people living alone: 29%, 1.9 percentage points more than Pontprennau and Old St Mellons (Cardiff: 32%).
Homes and prices
The most common type of home is detached houses in Pontprennau and Old St Mellons (44%) and semi-detached houses in Rumney (64%). Pontprennau and Old St Mellons has the higher share of owner-occupied homes: 71%, 2.1 percentage points more than Rumney (Cardiff: 58%). Pontprennau and Old St Mellons has the higher share of private renting: 18%, 6.4 percentage points more than Rumney (Cardiff: 24%). Over two years, homes sold for a median of £299,995 in Pontprennau and Old St Mellons and £250,000 in Rumney, against £270,000 across Cardiff.
Surroundings
Pontprennau and Old St Mellons has the higher share of land within 500 m that is green space: 27%, 9.7 percentage points more than Rumney (Cardiff: 19%). A typical postcode has 48 everyday shops and services within a 15-minute walk in Pontprennau and Old St Mellons, and 64 in Rumney. The typical postcode is 570 m from the nearest school in Pontprennau and Old St Mellons and 343 m in Rumney. The typical postcode is 3,484 m from the nearest tram stop or railway station in Pontprennau and Old St Mellons and 4,058 m in Rumney. Gigabit-capable broadband reaches 91% of premises in Pontprennau and Old St Mellons and 96% in Rumney.
Safety
Over 12 months, police recorded 66 crimes and incidents per 1,000 residents in Pontprennau and Old St Mellons and 73 in Rumney, against 118 across Cardiff. Police.uk records crimes by approximate location, not by where victims or offenders live. Busy streets, shops, stations and nightlife record more. Figures are counts, not a measure of personal risk.
Sources: Census 2021 (ONS) · HM Land Registry Price Paid Data · official school registers · © OpenStreetMap contributors · Environment Agency · data.police.uk, 12 months to Aug 2026 · Ofcom Connected Nations
In brief.
Each ward in a few lines, from its own page.
Pontprennau and Old St Mellons is one of 28 wards in Cardiff, home to 11,713 people in 4,910 households (Census 2021). Homes sold for a median of £299,995 over the past two years, 11% above the Cardiff median. On average 27% of the land within 500 metres of a home postcode is green space — 45% above the Cardiff average.
Rumney is one of 28 wards in Cardiff, home to 8,789 people in 3,603 households (Census 2021). Homes sold for a median of £250,000 over the past two years, 7% below the Cardiff median. On average 17% of the land within 500 metres of a home postcode is green space — 7% below the Cardiff average.
More comparisons.
Pontprennau and Old St Mellons and Rumney next to other wards of Cardiff.