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CM11 1

Postcode sector

181 live postcodes: 101 in Basildon, 80 in Chelmsford.

A postcode has no figures of its own: each layer is published for whole councils, neighbourhoods or exact points. The figures below are for the whole of Basildon, which holds 56% of CM11 1’s postcodes. Open the map at CM11 1 for neighbourhoods and points. Open the map at CM11 1

MPs for CM11 1

As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

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Deprivation by neighbourhood

English Indices of Deprivation 2025

Most deprived 10%Least

27 of Basildon’s 112 neighbourhoods are in England’s most deprived 20%.

Basildon, the council that holds 56% of CM11 1

Average house price
£367,233
Up 0.6% in a year
HM Land Registry · Jul 2026
Median full-time pay
£39,734
145th highest paid of 348
ONS earnings survey · 2025
House price to pay
9.2×
78th least affordable of 348
Worked out by Open Index
Deprivation score
22.6
106th most deprived of 296
MHCLG · England only

Everything about Basildon

Councils in CM11 1

Postcodes in CM11 1