Ofcom data · 431 postcodes

CM5 broadband coverage — Brentwood

Full-fibre, gigabit and superfast broadband availability across the CM5 postcode district, plus business broadband and leased-line options for Brentwood.

Excellent coverage

Superfast (30Mb+)

91.6%

Ultrafast (300Mb+)

88.3%

Gigabit-capable

88.3%

Below USO (10Mb)

0.2%

Check broadband at your exact CM5 postcode

District figures are an average — get the precise availability, full-fibre status and mobile signal for your address.

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Broadband in CM5

Broadband availability in the CM5 postcode district (Brentwood) is Excellent — gigabit-capable full fibre is widely available. Across the 431 postcodes Ofcom measures in CM5, superfast broadband (30 Mbit/s or faster) reaches 91.6% of premises and gigabit-capable lines are available to 88.3%.

Around 0.2% of premises in CM5 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 CM5

Postcode	Superfast	Gigabit
CM5 0AA	100%	100%
CM5 0AB	100%	100%
CM5 0AD	100%	100%
CM5 0AE	66.7%	66.7%
CM5 0AF	100%	100%
CM5 0AG	100%	100%
CM5 0AH	88.9%	88.9%
CM5 0AJ	43.5%	43.5%
CM5 0AL	93.3%	93.3%
CM5 0AN	80%	80%

Business broadband & leased lines in Brentwood

Whether the CM5 district has full fibre yet or not, we can connect your business. Where FTTP and gigabit are live we quote ultrafast full-fibre; where they aren't, a leased line still delivers guaranteed, symmetric speeds with an SLA. We also handle mobile coverage and VoIP for the same site.

Get a business broadband quote for CM5

Free, no obligation — full fibre, leased line or FTTC, matched to what's actually available at your postcode.

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Nearby CM districts

CM3 — 63.5% gigabit CM1 — 79.8% gigabit CM2 — 85.4% gigabit CM7 — 86.8% gigabit CM23 — 72.2% gigabit CM9 — 81.8% gigabit CM6 — 79% gigabit CM8 — 79.9% gigabit CM13 — 77.3% gigabit CM16 — 79.9% gigabit

See all Chelmsford (CM) broadband coverage ›

Frequently asked questions

What broadband speeds are available in the CM5 area (Brentwood)?

In the CM5 area (Brentwood), superfast broadband (30 Mbit/s+) is available to approximately 91.6% of premises and gigabit-capable broadband to around 88.3%, based on Ofcom Connected Nations data. Exact availability varies by postcode — enter your full postcode in our checker for a precise result.

Can I get full-fibre or gigabit broadband in the CM5 area (Brentwood)?

Gigabit-capable coverage in the CM5 area (Brentwood) stands at about 88.3% of premises. Where gigabit and full-fibre (FTTP) are live, businesses can order symmetric, low-latency connections — ideal for cloud, VoIP and multi-site working. If full fibre hasn't reached your premises yet, a leased line can still deliver guaranteed gigabit speeds.

How do I check broadband at my exact address in the CM5 area (Brentwood)?

Use the free broadband postcode checker on this page: enter your postcode to see fixed-broadband availability, gigabit/full-fibre coverage and mobile signal for all four networks at that location, sourced from official Ofcom data.

Who provides business broadband in the CM5 area (Brentwood)?

Most UK providers serve the CM5 area (Brentwood) over the Openreach and (where present) CityFibre or Virgin Media networks. Connection Technologies arranges business broadband, full-fibre (FTTP) and leased lines across the area — request a quote to compare options for your postcode.

Broadband availability data © 2026 Ofcom (Connected Nations), licensed under the Open Government Licence v3.0. Figures are area averages and predictions; availability at an individual address may differ — always confirm with a postcode-level check.