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Grendon Underwood & The Claydons

Ward

North west Buckinghamshire. About 11,345 people (mid-2024 estimate) in 122 square kilometres.

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Radon Affected Area by ward

Worked out by Open Index · 2022

Under 1%90% or more

About 35% of people in Grendon Underwood & The Claydons live in a 1 km square that the radon atlas marks as a radon Affected Area.

Population
10,968
2,011th most populated of 8,397
ONS Census 2021 · 2021
People in radon Affected Area squares
35%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
90.2%
UK 87.8%
Ofcom · Jan 2026
Claimant rate
2.2%
UK 3.9%
ONS via Nomis · Aug 2026

How Grendon Underwood & The Claydons compares

Each dot is a ward. The black line marks the middle one.

Grendon Underwood & The ClaydonsMiddle
Population49 wards, Buckinghamshire · 2021
Population: every ward in Buckinghamshire49 areas from 4,714 to 18,240. The middle area is 11,680. Grendon Underwood & The Claydons is 10,968.
10,96820th least populated
People in radon Affected Area squares49 wards, Buckinghamshire · 2022
People in radon Affected Area squares: every ward in Buckinghamshire49 areas from 0.0% to 100.0%. The middle area is 91.0%. Grendon Underwood & The Claydons is 35.0%.
35%13th fewest people in radon Affected Areas
Gigabit broadband coverage49 wards, Buckinghamshire · Jan 2026
Gigabit broadband coverage: every ward in Buckinghamshire49 areas from 27.8% to 97.7%. The middle area is 84.6%. Grendon Underwood & The Claydons is 90.2%.
90.2%16th highest
Claimant rate49 wards, Buckinghamshire · Aug 2026
Claimant rate: every ward in Buckinghamshire49 areas from 1.1% to 7.6%. The middle area is 2.6%. Grendon Underwood & The Claydons is 2.2%.
2.2%joint 18th lowest

Is Grendon Underwood & The Claydons safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Grendon Underwood & The Claydons at a rate of 36.8 per 1,000 people.

That compares with 61.3 per 1,000 people across Buckinghamshire.

Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.

In August 2026 alone, 34 cases of crime and anti-social behaviour were recorded in Grendon Underwood & The Claydons.

In the 12 months to August 2026, the most common types were violence and sexual offences (224), other crime (97) and criminal damage and arson (51).

Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.

Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.

Figures for the whole of Buckinghamshire

These figures are published for the whole of Buckinghamshire, not for each ward, so they describe all of Buckinghamshire and not Grendon Underwood & The Claydons alone. See Buckinghamshire

Average house price
£477,450
No change in a year
HM Land Registry · Aug 2026
Median full-time pay
£43,290
81st highest paid of 348
ONS earnings survey · 2025
House price to pay
11.0×
Joint 34th least affordable of 348
Worked out by Open Index
Deprivation score
11.9
47th least deprived of 296
MHCLG · England only
Grendon Underwood & The Claydons in brief

Grendon Underwood & The Claydons had 10,968 usual residents at the census.

About 35% of people in Grendon Underwood & The Claydons live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Grendon Underwood & The Claydons, 90.2% of homes and businesses could get gigabit-capable broadband in January 2026.

In Grendon Underwood & The Claydons, 2.2% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.