23 providers offer 326 broadband deals in Grendon Underwood, from £13.50 a month and up to 7,000 Mbps. Typical measured speed is 56 Mbps down and 115 Mbps up, 45% below the UK download average.
Best value broadband deal in Grendon Underwood, Buckinghamshire
The best value in Grendon Underwood, Buckinghamshire 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 Grendon Underwood, Buckinghamshire
£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 Grendon Underwood, Buckinghamshire
The fastest deal available in Grendon Underwood, Buckinghamshire is You 8000 from YouFibre at 7,000 Mbps. Next fastest is Full Fibre 5 Gigafast+ from Sky at 5,000 Mbps.
Fastest in Grendon Underwood, Buckinghamshire
£99/mo
No rises, no surprises.
£1188 total over 12 months
Runner-up on speed
Full Fibre 5 Gigafast+
3000 Mbps upload · Full Fibre
Best for power users & big households
£80/mo
No rises, no surprises.
£1925 total over 24 months
Cheapest broadband deal in Grendon Underwood, Buckinghamshire
The cheapest deal in Grendon Underwood, Buckinghamshire is 150Mbps Full Fibre (24 Months) from 4th Utility at £13.50 a month for 150 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £13.50 is an intro price that rises to £18.00 a month after the intro window, making the real first-year cost £162. Above the UK average on download.
Cheapest in Grendon Underwood, Buckinghamshire
150Mbps Full Fibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£13.50/mo
for 12 months, then £18/mo
Avg £15.75/mo over contract · £378 total over 24 months
Compare broadband deals in Grendon Underwood, Buckinghamshire
£5/mo
for 6 months, then £25/mo
Avg £20/mo over contract · £480 total over 24 months
£29/mo
rises to £31 in April 2027 (+£2)
Avg £30.50/mo over contract · £732 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
150Mbps Full Fibre (24 Months)
150 Mbps upload · Full Fibre
Best for 2–3 person homes, 4K streaming
£18/mo
for 12 months, then £23/mo
Avg £20.50/mo over contract · £492 total over 24 months
Broadband providers in Grendon Underwood, Buckinghamshire
23 providers serve Grendon Underwood, Buckinghamshire, with YouFibre the fastest at 7,000 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 Grendon Underwood, Buckinghamshire download speed at 56 Mbps.
Upgrade nudge
Room to upgrade in Grendon Underwood, Buckinghamshire
Only 19% are on 300Mbps or faster, even though 94% 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 Grendon Underwood, Buckinghamshire line runs 56 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 94% of Grendon Underwood, Buckinghamshire, and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach Grendon Underwood, Buckinghamshire?
The wholesale networks carrying Grendon Underwood, Buckinghamshire broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
Live altnets in Grendon Underwood, Buckinghamshire, drawn from the providers actually selling deals here. Where they reach, the gigabit prices are normally the lowest on the page.
- CityFibre: Sky, TalkTalk, The One Broadband, Vodafone, Zen Internet
- 4th Utility: 4th Utility, Rise Fibre
- Hyperoptic
Add to the list Openreach and Virgin Media O2 (Openreach is built out to roughly every house in the country).
Real provider count in Grendon Underwood, Buckinghamshire: 23 actively selling into addresses.
What broadband coverage does Grendon Underwood, Buckinghamshire have?
Superfast broadband reaches 100% of Grendon Underwood, Buckinghamshire premises but gigabit only 94%, so around 6% of homes can get fast broadband but not the fastest.
Can I rely on mobile broadband in Grendon Underwood, Buckinghamshire?
Outdoor 5G reaches 100% of Grendon Underwood, Buckinghamshire homes. Here is how mobile holds up if the line drops.
5G & 4G home broadband
Outdoor 5G covers 100% of Grendon Underwood, Buckinghamshire, enough for a 5G home-broadband hub to stand in for a fixed line.
More areas in Buckinghamshire
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 Grendon Underwood, Buckinghamshirecome 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.