CR postcode locations
CR Postcode Area: Damp, Mould & Leak Detection by District
8 districts from CR0 to CR8. Pick your district to find the local page for your street.
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Fully insured · Non-invasive methods first · Written reports included · London & Surrey

The CR postcode area
The CR postcode area is named after Croydon and covers the London Borough of Croydon with parts of Merton, Sutton and Bromley. It runs south over the Downs into Surrey: CR3 (Caterham, Whyteleafe) and CR6 (Warlingham) are in Tandridge district, and CR5 (Coulsdon) reaches into Reigate and Banstead. Croydon was one of the first places in the country to be postcoded, in the 1966 trial that preceded the national scheme.
The stock runs from the tower blocks and converted houses of central Croydon and Thornton Heath, through long streets of Victorian and Edwardian terraces in Norbury, South Norwood and Addiscombe, to the inter-war and post-war semis of Purley, Coulsdon and Caterham on the chalk. Flats above shops and converted houses with shared roofs and services are a steady source of leak-tracing work for us.
Pick your district below for the local pages inside it. Districts whose places share a page are covered from the council page shown on the row.
Councils and post towns in the CR area. Croydon has places in CR0, CR2, CR4 to CR5 and CR7 to CR8; Tandridge in CR3 and CR6; Merton and Sutton in CR4; Reigate and Banstead in CR5, so the area straddles Greater London and Surrey. Royal Mail post towns across the area: Croydon, South Croydon, Caterham, Whyteleafe, Mitcham, Coulsdon, Warlingham, Thornton Heath, Purley, Kenley.
Housing in Croydon and Tandridge (Census 2021), the main council areas for CR postcodes in our directory: tenure across 188,568 households is 58% owner-occupied, 24% private rented and 17% social rented; by type, 27% purpose-built flats, 10% converted or other flats, 21% terraced, 25% semi-detached, 17% detached.Source: ONS Census 2021, tables TS054 (tenure) and TS044 (accommodation type), via Nomis.
Districts CR0 to CR8
CR0: Croydon
Council area: Croydon / Sutton / Merton.
Also covered: Beddington, Coombe, Addington, Forestdale, New Addington, Shirley and 2 more.
CR2: South Croydon
Council area: Croydon.
Also covered: Selsdon.
CR3: Caterham and Whyteleafe
Council area: Tandridge / Croydon.
Caterham · Whyteleafe · Woldingham · Chaldon
CR4: Mitcham
Council area: Merton / Croydon / Sutton.
CR5: Coulsdon
Council area: Croydon / Reigate and Banstead / Sutton / Tandridge.
Also covered: Coulsdon, Old Coulsdon.
CR6: Warlingham
Council area: Croydon / Tandridge / Bromley.
Also covered: Hamsey Green.
CR7: Thornton Heath
Council area: Croydon / Merton.
CR8: Purley and Kenley
Council area: Croydon / Tandridge.
Also covered: Riddlesdown.
CR9, CR44 and CR90 are non-geographic codes used for business and PO-box mail, with no street addresses, so there is no local page.
Part of our London and Surrey coverage. All postcode areas · All locations
Real investigations by our team
Examples from DML investigations across our service area. Our own photographs, not stock imagery.



What we do across the CR postcode area
Find the cause, prove it in writing, then put it right: the same order on every job. All services →
Leak detection
Thermal imaging, acoustic listening and moisture tracing to pinpoint a hidden leak before any wall comes down.
Insurance-ready reports
Independent written evidence of what leaked, where, and what it damaged.
Mould treatment & investigation
Investigation first, then treatment of the affected surfaces and a written record for landlords and tenants.
Damp & mould surveys
A proper diagnosis (condensation, penetrating or rising damp) so you fix the right thing once.
Book a damp, mould or leak investigation in the CR postcode area
Our team takes the details, confirms what the visit will cover and books an engineer. Live leaks go to the front of the queue.
Get a call back☎ 0800 054 1524WhatsApp us
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Included
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Evidence Reports
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Call-back request for the CR postcode area
Tell us what you can see, smell or hear and when it started. One of our engineers will call to talk it through; for a live leak ring 0800 054 1524.
Before you call: questions about the CR postcode area
Do you charge differently across the CR postcode area?
No. Every job is quoted individually once we understand the problem; there is no area surcharge anywhere we work.
Do you cover the whole of the CR postcode area?
Yes. Every borough, town and village listed on this page is attended by our own team, and places without their own page yet are covered in the same way. If in doubt, call 0800 054 1524.
Do you attend in the CR postcode area at night and at weekends?
Our team is available around the clock for active leaks and water coming into a property. Routine damp surveys and mould investigations are booked for a daytime slot that suits you.
Last reviewed: 27 October 2026. Independent investigation and written reports. Repairs are quoted separately.