CM11 postcode area guide — Basildon
House prices, crime, broadband speeds, mobile signal, schools and demographics for the CM11 postcode district in Basildon — every official dataset on one page.
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Where is CM11?
Broadband & internet speeds in CM11
Excellent coverage
Superfast (30Mb+)
94.3%
Ultrafast (300Mb+)
81.4%
Gigabit-capable
81.4%
Below USO (10Mb)
0.1%
Broadband availability in the CM11 postcode district (Basildon) is Excellent — gigabit-capable full fibre is widely available. Across the 444 postcodes Ofcom measures in CM11, superfast broadband (30 Mbit/s or faster) reaches 94.3% of premises and gigabit-capable lines are available to 81.4%.
Around 0.1% of premises in CM11 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.
Sample postcodes in CM11
| Postcode | Superfast | Gigabit |
|---|---|---|
| CM11 1AA | 100% | 95.5% |
| CM11 1AB | 100% | 76.9% |
| CM11 1AE | 100% | 76.2% |
| CM11 1AF | 100% | 100% |
| CM11 1AG | 100% | 100% |
| CM11 1AH | 100% | 100% |
| CM11 1AJ | 100% | 0% |
| CM11 1AL | 100% | 100% |
| CM11 1AN | 100% | 100% |
| CM11 1AP | 100% | 100% |
Run a speed test to see what you're actually getting, or check your exact postcode.
Mobile signal around Basildon
Ofcom's coverage model for the wider Basildon district (85,060 premises):
4G indoors — all networks
94.7%
4G outdoors — all networks
100%
5G outdoors — all networks
82.4%
Voice indoors — all networks
97.9%
Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.
Crime in CM11
Police recorded 29 incidents within about a mile of the centre of CM11 in May 2026 (latest published street-level data). The breakdown:
| Category | Incidents | Share |
|---|---|---|
| Violence & sexual offences | 16 | 55.2% |
| Criminal damage & arson | 6 | 20.7% |
| Public order | 3 | 10.3% |
| Drugs | 2 | 6.9% |
| Burglary | 1 | 3.4% |
| Shoplifting | 1 | 3.4% |
Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).
House prices in CM11
Based on 195 sales registered with HM Land Registry in the last 12 months, the median sold price in CM11 is £475,000, essentially flat on the previous year (£475,000).
Detached
£740,000
73 sales
Semi-detached
£465,000
77 sales
Terraced
£400,000
31 sales
Flat / maisonette
£170,000
11 sales
Latest recorded sales in CM11
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 21 May 2026 | £835,000 | Detached | Jacksons Lane | CM11 1AH |
| 14 May 2026 | £465,000 | Semi-detached | The Oaks | CM11 2RP |
| 6 May 2026 | £415,000 | Terraced | Copford Road | CM11 2DU |
| 5 May 2026 | £785,000 | Detached | Martingale Road | CM11 1SG |
| 1 May 2026 | £525,000 | Detached | Park Lane | CM11 1NE |
| 28 Apr 2026 | £465,000 | Semi-detached | Meadow Rise | CM11 2EF |
| 24 Apr 2026 | £708,000 | Detached | The Mount | CM11 1HD |
| 24 Apr 2026 | £710,000 | Detached | Southlands Road | CM11 2XB |
| 24 Apr 2026 | £313,000 | Terraced | Hatfield Drive | CM11 2NQ |
| 21 Apr 2026 | £465,000 | Semi-detached | Outwood Farm Close | CM11 2ND |
Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
Who lives here? Basildon demographics
Census 2021 figures for the wider Basildon district (187,571 residents, 76,363 households):
| Age profile | |
|---|---|
| Under 15 | 20.7% |
| 15–29 | 23.4% |
| 30–44 | 19.8% |
| 45–64 | 19.1% |
| 65+ | 17% |
| Housing tenure | |
|---|---|
| Owner-occupied | 63.3% |
| Private rented | 14.4% |
| Social rented | 7.4% |
Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.
Schools in and around CM11
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| St Peter's Catholic Primary School | Primary | 4–11 | 419 | CM11 2UB |
| Sunnymede Primary School | Primary | 4–11 | 389 | CM11 2HL |
| Downham Church of England Voluntary Controlled Primary School | Primary | 5–11 | 173 | CM11 1NU |
| South Green Infant School | Primary | 3–7 | 172 | CM11 2TG |
| Ramsden Hall Academy | Not applicable | 10–16 | 116 | CM11 1HN |
| Crays Hill Primary School | Primary | 4–11 | 82 | CM11 2UZ |
Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.
Food hygiene ratings in CM11
73 rated food businesses operate in CM11. 61 hold the top rating of 5, 5 are rated 4, and 1 are rated 2 or below.
Among the 5-rated: Anisha Grange Care Home, B & J Curtis, Barleylands Farm Day Nursery and Pre-school, Barleylands Farm Shop, Beauvoir Arms.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in CM11
From a sample of 126 Energy Performance Certificates across 11 CM11 postcodes, the most common rating is band D (average band D). 41% of sampled homes are rated C or better.
Band B
8%
Band C
33%
Band D
36%
Band E
19%
Band F
2%
Band G
2%
Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.
Phone area codes for Basildon
Landlines around CM11 typically use:
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What's it like living in CM11?
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Moving to CM11? Sort your connectivity first
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Postcodes in CM11
Neighbouring districts
All Chelmsford (CM) postcode districts ›
Frequently asked questions
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Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.