Pontprennau and Old St Mellons
A ward in Cardiff. Rent, council tax, energy and water are set across Cardiff, so they're the same here as anywhere in the borough; what's specific to Pontprennau and Old St Mellons is its broadband and house prices.
Broadband in Pontprennau and Old St Mellons
89% gigabit· 92% superfast
Ofcom Connected Nations 2024
Typical home in Pontprennau and Old St Mellons
Median price not available for this ward.
ONS HPSSA, year ending Mar 2023
The monthly cost across Cardiff
The breakdown is the same for every ward in Cardiff. The buyer view is seeded with Pontprennau and Old St Mellons's median house price, so the mortgage estimate is local to here.
£59/mo less than the sample average
What's in that number
The detail
Rent
ONS — Price Index of Private Rents, UK: monthly price statisticsas of 2026-04
Council tax
See all bands (A–I)Hide bands
| Band A | £107.01/mo |
| Band B | £124.85/mo |
| Band C | £142.68/mo |
| Band D (headline) | £160.52/mo |
| Band E | £196.19/mo |
| Band F | £231.86/mo |
| Band G | £267.53/mo |
| Band H | £321.03/mo |
| Band I | £374.54/mo |
StatsWales / Welsh Government — Council Tax levels in Walesas of 2025-26
Energy
Octopus Energy 'Flexible' tariff (tracks the Ofgem price cap) + Ofgem TDCV (medium)as of 2026-06
Water
Water UK / CCW: average household billas of 2025-26
Broadband
Ofcom Connected Nations 2024 (ward-level coverage) + UK typical priceas of 2024-07
Insurance
IndicativeConfused.com/WTW (car) & ABI (home): regional averagesas of 2026-Q1
No surprises, promise.
These are estimates, not quotes. Real figures vary by property and provider. We show our sources so you can check our working.