Living in CM21: Liveability Score 54/100
East Hertfordshire, East of England
Last updated 25 June 2026
Postcodes scored in this district
Every active postcode in CM21, each shaded by its own score. Postcode districts have no official boundary. These points are exactly what the score is averaged from. Clustered pins are other districts. Tap one to view or compare it, or zoom in to reveal more.
Each postcode is coloured by its own overall score on the default weighting. Scores are filled in as postcodes get searched on the site, so a blue dot just means that postcode hasn't been scored yet.
CM21 scores 54 but individual postcodes tell the full story
See the exact score for any postcode, side by side with CM21.
Score breakdown
Safety & Environment
Crime is well below the national average. 699 offences recorded across 7 local areas in the past year.
Broadly acceptable environment.
Services
1 Outstanding, 6 Good out of 7 rated schools.
Healthcare ratings are broadly average. 1 GP surgery and 1 hospital facility serve the area.
72% gigabit coverage; 93% have superfast (≥30 Mbps).
Economy & Bills
IMD deprivation decile 8/10, among the least deprived in England.
Band D council tax £2,455/year, typical EPC rating D. Running costs are broadly average.
Transport
Limited public transport: primarily car-dependent.
Lifestyle
Relatively limited local amenities compared to the national average. Around 112 amenities within 2km of the typical resident.
CM21 covers 320 active postcodes in East Hertfordshire, East of England.
Frequently asked questions
Is CM21 a safe area to live?
CM21 scores 79/100 for safety. Crime is well below the national average. 699 offences recorded across 7 local areas in the past year.
What are the schools like in CM21?
Schools in CM21 score 51/100. 1 Outstanding, 6 Good out of 7 rated schools.
How good is the broadband in CM21?
Broadband in CM21 scores 38/100. 72% gigabit coverage; 93% have superfast (≥30 Mbps).
How does CM21 compare to nearby areas?
Nearby districts include CM17, CM20, SG10. Use the PostcodeScorer comparison tool to compare them side by side.
What is the overall liveability score for CM21?
CM21 scores 54/100, rated "Average", across nine categories: safety, schools, healthcare, environment, transport, lifestyle, broadband, economic health, and bills. The UK average is approximately 62/100.
Towns & cities in CM21
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