CR postcode district map, Warlingham
Supplier statuses last checked .
The CR postcode area covers 10 districts and 8,009 live postcodes, from CR0 to CR90. It is centred on Warlingham and also covers Ewell, Caterham and Banstead.
Districts here average 801 postcodes.
Where the CR districts sit
1 district is plotted without a label where labels would overlap; every one is in the table below.
Where CR sits
It falls across Greater London and Surrey.
Water supply across CR
All 10 CR districts are supplied by Thames Water. That makes CR simple in a way many areas are not: one company, one set of rules, one status to check.
Thames Water has a hosepipe ban in force from 23 July 2026, covering the whole of CR.
The shape of the CR area
CR0 is the largest district with 2,791 postcodes around Warlingham, and CR90 the smallest with 46. The area divides into 53 postcode sectors.
CR0 alone holds about 35 per cent of every postcode in CR,.
The numbering is not continuous. CR runs up to 90 but has only 10 districts, so 81 numbers are unused:.
District by district: CR0 serves Warlingham, CR2 serves Warlingham, CR3 serves Caterham, CR4 serves Ewell, CR5 serves Banstead, CR6 serves Warlingham, CR7 serves Warlingham, CR8 serves Warlingham, CR9 serves Warlingham and CR90 serves Warlingham.
Several districts share a settlement, which is a common source of confusion when a form rejects an address: CR0, CR2, CR6, CR7, CR8, CR9 and CR90 all point at Warlingham.
What borders CR
CR sits next to SM (Ewell) to the west, BR (Swanley) to the north east, SE (City of London) to the north east, SW (City of Westminster) to the north west and KT (Esher) to the west.
CR districts, settlements and water supply
| District | Principal settlement | Water company | Hosepipe ban status |
|---|---|---|---|
| CR0 | Warlingham | Thames Water / SES Water | Depends on your supplier |
| CR2 | Warlingham | Thames Water / SES Water | Depends on your supplier |
| CR3 | Caterham | Thames Water / SES Water | Depends on your supplier |
| CR4 | Ewell | Thames Water / SES Water | Depends on your supplier |
| CR5 | Banstead | Thames Water / SES Water | Depends on your supplier |
| CR6 | Warlingham | Thames Water / SES Water | Depends on your supplier |
| CR7 | Warlingham | Thames Water / SES Water | Depends on your supplier |
| CR8 | Warlingham | Thames Water / SES Water | Depends on your supplier |
| CR9 | Warlingham | Thames Water / SES Water | Depends on your supplier |
| CR90 | Warlingham | Thames Water / SES Water | Depends on your supplier |
Principal settlement is the town or city each district sits in or nearest to, derived from OS Open Names. It is not the Royal Mail post town, which is licensed data and not published openly. Status is resolved live from each company’s own notice.
Water hardness in CR
No water company covering CR publishes hardness figures as open data. The gap is named per district below so you know who to ask.
| District | Hardness | As published | Supply zone | Published by |
|---|---|---|---|---|
| CR0 | Not published by Thames Water. Check with your supplier. | |||
| CR2 | Not published by Thames Water. Check with your supplier. | |||
| CR3 | Not published by Thames Water. Check with your supplier. | |||
| CR4 | Not published by Thames Water. Check with your supplier. | |||
| CR5 | Not published by Thames Water. Check with your supplier. | |||
| CR6 | Not published by Thames Water. Check with your supplier. | |||
| CR7 | Not published by Thames Water. Check with your supplier. | |||
| CR8 | Not published by Thames Water. Check with your supplier. | |||
| CR9 | Not published by Thames Water. Check with your supplier. | |||
| CR90 | Not published by Thames Water. Check with your supplier. | |||
Hardness is published per census area, not per postcode, so these figures characterise a district rather than measuring one address. They are a scale and taste matter, not a safety one. Hardness data version wessex-water@2022-2025+yorkshire-water@2026.
Download the CR data
No signup, no email wall. GeoJSON carries the district points, the supplier and the live status, so it can be dropped straight into a map.
District positions are averaged postcode centroids from OS Code-Point Open. They show roughly where a district sits, not where its boundary runs, and are not legal boundaries.
Frequently asked questions
How many postcode districts are in the CR area?
There are 10 CR postcode districts, running from CR0 to CR90, and they contain 8,009 live postcodes across 53 sectors.
What towns does the CR postcode area cover?
CR covers Warlingham, Ewell, Caterham and Banstead. The area takes its name from Warlingham, and each district is listed with its settlement in the table on this page.
Which water company supplies CR postcodes?
Thames Water supplies all 10 CR districts. Supply boundaries follow the pipe network rather than postcode geography, so confirm against your water bill if you are near the edge of the area.
Why do CR0 and CR2 both say Warlingham?
CR0, CR2, CR6, CR7, CR8, CR9 and CR90 all serve Warlingham, covering different parts of it. A single town routinely needs more than one postcode district once it passes a few thousand delivery points, so this is normal rather than an error in an address.
Can I download a free CR postcode map?
Yes. This page offers the CR districts as GeoJSON, CSV and SVG, free and with no signup or email address required. The GeoJSON carries each district's position, its water company and its current restriction status, so it can be dropped straight into a mapping tool.
Which councils cover the CR postcode area?
CR reaches into Greater London and Surrey. A postcode area is not a council area: they were drawn for different purposes and a single district can sit across a council boundary, so your postcode does not tell you which authority you pay.
Why is there no CR1 postcode district?
CR1 is not in use. Postcode districts are allocated as sorting requirements change rather than numbered straight through, and a code that is retired or never brought into service is not reissued, so gaps in the sequence are normal.