17 providers offer 184 broadband deals in Castle Cary, from £19.00 a month and up to 1,600 Mbps. Typical measured speed is 67 Mbps down and 41 Mbps up, 34% below the UK download average.
Best value broadband deal in Castle Cary, Somerset (BA7)
The best value in Castle Cary, Somerset (BA7) on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in Castle Cary, Somerset (BA7)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in Castle Cary, Somerset (BA7)
The fastest deal available in Castle Cary, Somerset (BA7) is Full Fibre 1.6GB Premium from EE at 1,600 Mbps.
Fastest in Castle Cary, Somerset (BA7)
Full Fibre 1.6GB Premium
115 Mbps upload · Full Fibre
Best for power users & big households
£33.99/mo
rises to £37.99 in March 2027 (+£4)
Avg £37.32/mo over contract · £896 total over 24 months
Cheapest broadband deal in Castle Cary, Somerset (BA7)
The cheapest deal in Castle Cary, Somerset (BA7) is Explorer 300 from Gigaclear at £19.00 a month for 300 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. 4th Utility is essentially level at £20.00 a month.
Cheapest in Castle Cary, Somerset (BA7)
£19/mo
No rises, no surprises.
£342 total over 18 months
Runner-up on price
300Mb Full Fibre (24 Months)
300 Mbps upload · Full Fibre
Best for 4–5 person households, heavy use
£20/mo
for 12 months, then £40/mo
Avg £30/mo over contract · £720 total over 24 months
Compare broadband deals in Castle Cary, Somerset (BA7)
300Mb Full Fibre (24 Months)
300 Mbps upload · Full Fibre
Best for 4–5 person households, heavy use
£20/mo
for 12 months, then £40/mo
Avg £30/mo over contract · £720 total over 24 months
£30/mo
rises to £33.50 in April 2027 (+£3.50)
Avg £32.63/mo over contract · £783 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Broadband providers in Castle Cary, Somerset (BA7)
17 providers serve Castle Cary, Somerset (BA7), with EE the fastest at 1,600 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 Castle Cary, Somerset (BA7) download speed at 67 Mbps.
Upgrade nudge
Room to upgrade in Castle Cary, Somerset (BA7)
Only 8% of the 1,400 connections here are on 300Mbps or faster, even though 86% 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 Castle Cary, Somerset (BA7) line runs 67 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 86% of Castle Cary, Somerset (BA7), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Castle Cary, Somerset (BA7)?
The wholesale networks carrying Castle Cary, Somerset (BA7) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Altnets reaching Castle Cary, Somerset (BA7): the full-fibre networks that compete with Openreach. Where they reach, they're usually the cheapest gigabit option.
- CityFibre: Sky, The One Broadband
- 4th Utility: 4th Utility, Rise Fibre
Layered on top, Openreach also reach this area (Openreach is the universal default, so the address question is which altnet, not whether Openreach).
17 providers compete for Castle Cary, Somerset (BA7) broadband customers right now.
What broadband coverage does Castle Cary, Somerset (BA7) have?
Superfast broadband reaches 98% of Castle Cary, Somerset (BA7) premises but gigabit only 86%, so around 12% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Castle Cary, Somerset (BA7)?
Outdoor 5G reaches 95% of Castle Cary, Somerset (BA7) homes. Here is how mobile holds up if the line drops.
How Castle Cary, Somerset (BA7) compares within Somerset
Across 39 postcode districts in Somerset, by premises count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
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* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for Castle Cary, Somerset (BA7)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.