Petrol prices in CM21
Every forecourt in the CM21, Chelmsford postcode district, cheapest first, with live prices from the government Fuel Finder feed — covering East Hertfordshire, East of England.
CM21 has only one forecourt, so there is no comparison to make within the district itself. The CM area page covers the surrounding districts, which is where a cheaper option would be.
Petrol stations in CM21 (1)
Cheapest first. Prices update through the day.
SHELL, SAWBRIDGEWORTHCheapestSAWBRIDGEWORTH£1.80E10£1.99B7Is anywhere nearby cheaper?
Neighbouring districts, with the fuel the drive itself burns already subtracted — a 45 mpg car, there and back.
SG12Stevenage9.1 km away · 11.3 mile round trip · 2 forecourts£1.63saves 13.6p a litreCM20Chelmsford4.8 km away · 6.0 mile round trip · 4 forecourts£1.70saves 8.1p a litreCM18Chelmsford7.2 km away · 8.9 mile round trip · 2 forecourts£1.70saves 7.2p a litreThe saving shown is what is left after the detour: the pump price plus the extra fuel burned getting there and back, spread across a 55-litre fill. A forecourt that is 4p cheaper eight miles away is not 4p cheaper. The arithmetic is here.
Nearby postcode districts
Closest first, with today’s typical price.
About fuel prices in CM21
CM21 is part of the CM postcode area, which covers Chelmsford, and its forecourts sit mainly in East Hertfordshire in East of England. We track 1 forecourt here across 1 brand.
There is no supermarket forecourt in CM21, which usually shows in the price: supermarket sites anchor local competition, and districts without one tend to run dearer than neighbours that have one. Across East of England as a whole the median is £1.70 — see the whole region.
Every price here comes from the government Fuel Finder scheme, which since February 2026 has required each forecourt to report a change within thirty minutes. For the forecourts nearest a specific address rather than a whole district, search your full postcode.
Common questions about CM21
How much is petrol in CM21 today?
The typical CM21 forecourt is charging £1.80 a litre for E10 petrol — £98.94 for a 55-litre tank. The one forecourt reporting a price is at £1.80.
Where is the cheapest petrol in CM21?
SHELL, SAWBRIDGEWORTH in SAWBRIDGEWORTH at £1.80 a litre. Prices change through the day, so check before you set off.
Is CM21 cheaper or dearer than the rest of the UK?
CM21 runs 10.0p above the UK median of £1.70, and sits in East of England, where the regional median is £1.70. Local competition drives most of that: districts with two or more supermarket forecourts close together price lower than districts where the nearest alternative is a drive away.
Is it worth driving to a cheaper postcode from CM21?
Right now, yes — SG12 has fuel at £1.63, and even after the 18.2 km round trip burns its own fuel, you are about 13.6p a litre better off. That is roughly £7.49 on a tank. Anything closer than that is not worth a special journey, though it may be worth routing past.
How many petrol stations are there in CM21?
1 forecourts, from 1 different brands. Every one reports its prices to the government Fuel Finder scheme within thirty minutes of a change.