Full fibre reaches 90.8% of homes in Castleton, though only 10% of connections run at 300 Mbps or faster. Typical measured speed is 90 Mbps down and 17 Mbps up, 11% below the UK download average. 16 providers offer 218 broadband deals, up to 2,300 Mbps.
Deals for Castleton (OL11), checked and refreshed daily.
Best value broadband deal in Castleton (OL11)
The best value in Castleton (OL11) on full first-year cost is 4th Utility's 300Mb Full Fibre (24 Months): £240 across year one, about £20 a month. At 300 Mbps it copes with anything a household runs at once.
Best value in Castleton (OL11)
£20/mo
for 12 months, then £40/mo
Cheapest broadband deal in Castleton (OL11)
The cheapest deal in Castleton (OL11) is Fibre 40 from Onestream at £18.50 a month for 40 Mbps. 4th Utility is essentially level at £20.00 a month. Well below the UK average, which shows on a busy evening.
Cheapest in Castleton (OL11)
£18.50/mo
rises to £21.25 in April 2027 (+£2.75)
Runner-up on price
£20/mo
for 12 months, then £40/mo
Fastest broadband deal in Castleton (OL11)
The fastest deal available in Castleton (OL11) is 2300 Full Fibre 24m from Zzoomm at 2,300 Mbps.
Fastest in Castleton (OL11)
2300 Full Fibre 24m
£35/mo
for 12 months, then £39/mo
Compare broadband deals in Castleton (OL11)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
£27.99/mo
rises to £31.99 in March 2027 (+£4)
£23/mo
No rises, no surprises.
£23/mo
No rises, no surprises.
Broadband providers in Castleton (OL11)
16 providers serve Castleton (OL11) including Virgin Media, Sky and BT, with Zzoomm the fastest at 2,300 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical Castleton (OL11) download speed at 90 Mbps.
Upgrade nudge
Room to upgrade in Castleton (OL11)
Only 10% of the 12,000 connections here are on 300Mbps or faster, even though 90% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical Castleton (OL11) line runs 90 Mbps.
Working from home
OKStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 90% of Castleton (OL11), and the fastest available is 1,000 Mbps. The full split by band is below.
What broadband coverage does Castleton (OL11) have?
Superfast broadband reaches 99% of Castleton (OL11) premises but gigabit only 90%, so around 9% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Castleton (OL11)?
Outdoor 5G reaches 100% of Castleton (OL11) homes. Here is how mobile holds up if the line drops.
The two 5G figures differ. “5G availability” is everyday 5G running on the existing 4G core, which is what most phones show. “Next-gen 5G” is standalone 5G: a full 5G network with lower lag, still reaching fewer places.
5G & 4G home broadband
Outdoor 5G covers 100% of Castleton (OL11), enough for a 5G home-broadband hub to stand in for a fixed line.
How Castleton (OL11) compares within Rochdale
Across 6 postcode districts in Rochdale, by connection count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
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Speed and coverage figures for Castleton (OL11)come from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.