Compare gas and electricity prices in Cardiff (Caerdydd), Wales. Cardiff has approximately 155,800 households across a population of around 373,300, served by CF postcodes. Cardiff's electricity is distributed by National Grid Electricity Distribution (South Wales) and gas is distributed by Wales & West Utilities — the same physical infrastructure regardless of which energy supplier you choose. The physical supply normally continues during a supplier change; your new supplier should confirm the transfer process and date.
Use your full CF postcode, annual gas and electricity usage in kWh, meter type and existing contract to compare the same usage across offers. Check unit rates, daily standing charges, annual cost, fixed-term length, exit fees and any bundled-service requirements. The dated South Wales rates below are benchmarks, not live postcode-specific quotes or a whole-market ranking. Compare with your own bill.
The Welsh Government's Nest service provides free, impartial advice; some households may qualify for energy-efficiency improvements after an eligibility check. Cardiff Council's energy guidance lists help with bills and local schemes, including support information for Splott, Adamsdown and Fairwater. These services do not require a switch to Utility Warehouse.
Indicative electricity rates in the South Wales distribution region (2,700 kWh/year, Q3 2026 (from 1 July 2026)): Outfox Energy Fix'd 12M — 20.80p/kWh, 57.86p/day standing charge, ~£773/year (elec); E.ON Next Fixed 12M — 21.30p/kWh, 57.86p/day, est. £786/year (elec); Sainsbury's Energy Fix & Save 15M — 22.22p/kWh, 57.86p/day, ~£811/year (elec). Utility Warehouse Fixed Saver — dual-fuel, quote required. Fixed offers are not subject to the standard variable tariff price cap; confirm current terms and rates with the supplier.
Electricity: National Grid Electricity Distribution (South Wales), formerly Western Power Distribution — manages the distribution network across all CF postcodes (CF1–CF64). Power cut helpline: 105. Gas: Wales & West Utilities — operates over 35,000 km of gas pipes across Wales and the South West of England, serving all CF-postcode areas. Gas emergency: 0800 111 999.
Standard single-rate meters are most common across CF postcodes. Economy 7 dual-rate meters are common in older Cardiff terraces — Pontcanna, Roath, and Canton — with electric storage heating; cheaper off-peak rate applies 23:00–07:00. Smart meters are increasingly common in Cardiff Bay and new developments. Prepayment meters are also used; confirm meter compatibility and tariff availability in the current quote.