CM15 postcode area guide — Brentwood

Where is CM15?

Broadband & internet speeds in CM15

Strong coverage

Broadband availability in the CM15 postcode district (Brentwood) is Strong — superfast is near-universal and gigabit is rolling out. Across the 589 postcodes Ofcom measures in CM15, superfast broadband (30 Mbit/s or faster) reaches 97.1% of premises and gigabit-capable lines are available to 76.1%.

Around 0% of premises in CM15 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 CM15

Run a speed test to see what you're actually getting, or check your exact postcode.

Mobile signal around Brentwood

Ofcom's coverage model for the wider Brentwood district (36,919 premises):

Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.

Crime in CM15

Police recorded 42 incidents within about a mile of the centre of CM15 in May 2026 (latest published street-level data). The breakdown:

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 CM15

Based on 254 sales registered with HM Land Registry in the last 12 months, the median sold price in CM15 is £537,500, up 2.4% on the previous year (£525,000).

Latest recorded sales in CM15

Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.

Who lives here? Brentwood demographics

Census 2021 figures for the wider Brentwood district (77,046 residents, 32,343 households):

Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.

Schools in and around CM15

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 CM15

181 rated food businesses operate in CM15. 141 hold the top rating of 5, 12 are rated 4, and 2 are rated 2 or below.

Among the 5-rated: A Gilmore \& Sons, A.S.K WINES, Academy Trust T/A Shenfield St Marys C 0F E Primary School, Aliona Cojan, Als Corner Deli.

Source: Food Standards Agency, food hygiene ratings (FHRS) open data.

Energy performance (EPC) in CM15

From a sample of 134 Energy Performance Certificates across 11 CM15 postcodes, the most common rating is band D (average band D). 38% of sampled homes are rated C or better.

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 Brentwood

Landlines around CM15 typically use:

Had a call from an unknown number? Use our free UK phone number checker to see who called.

What's it like living in CM15?

Postcodes in CM15

Neighbouring districts

All Chelmsford (CM) postcode districts ›

Frequently asked questions

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.