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North Blackwood, Argoed & Markham

Middle area

North Caerphilly. 5,677 people (mid-2024 estimate) in 19 square kilometres.

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Radon Affected Area by middle area

Worked out by Open Index · 2022

Under 1%90% or more

About 79% of people in North Blackwood, Argoed & Markham live in a 1 km square that the radon atlas marks as a radon Affected Area.

Median sale price
£245,000
Joint 2,541st cheapest of 7,259
Worked out by Open Index
Population
5,601
Joint 2,290th least populated of 9,448
ONS Census 2021 · 2021
People in radon Affected Area squares
79%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
92.2%
UK 87.8%
Ofcom · Jan 2026

Recorded crime in North Blackwood, Argoed & Markham

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in North Blackwood, Argoed & Markham at a rate of 91.9 per 1,000 people.

That compares with 107.3 per 1,000 people across Caerphilly.

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

Recorded by police, 12 months to August 2026
Kind of crimeRecorded
Violence and sexual offences227
Anti-social behaviour95
Other crime94
Criminal damage and arson49
Vehicle crime27
Burglary14
Drug offences10
Robbery3
Shoplifting2
Theft from the person1

Source: police.uk, 12 months to August 2026

How North Blackwood, Argoed & Markham compares

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

North Blackwood, Argoed & MarkhamMiddle
Median sale price24 middle areas, Caerphilly · 2025
Median sale price: every middle area in Caerphilly24 areas from £115,000 to £265,000. The middle area is £193,250. North Blackwood, Argoed & Markham is £245,000.
£245,0004th most expensive
Population24 middle areas, Caerphilly · 2021
Population: every middle area in Caerphilly24 areas from 5,085 to 10,624. The middle area is 7,128. North Blackwood, Argoed & Markham is 5,601.
5,6014th least populated
People in radon Affected Area squares24 middle areas, Caerphilly · 2022
People in radon Affected Area squares: every middle area in Caerphilly24 areas from 9.0% to 100.0%. The middle area is 94.5%. North Blackwood, Argoed & Markham is 79.0%.
79%6th fewest people in radon Affected Areas
Gigabit broadband coverage24 middle areas, Caerphilly · Jan 2026
Gigabit broadband coverage: every middle area in Caerphilly24 areas from 44.3% to 98.4%. The middle area is 94.3%. North Blackwood, Argoed & Markham is 92.2%.
92.2%10th lowest

Is North Blackwood, Argoed & Markham safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in North Blackwood, Argoed & Markham at a rate of 91.9 per 1,000 people.

That compares with 107.3 per 1,000 people across Caerphilly.

Across Wales as a whole, the recorded crime rate was 96.7 per 1,000 people.

In August 2026 alone, 57 cases of crime and anti-social behaviour were recorded in North Blackwood, Argoed & Markham.

In the 12 months to August 2026, the most common types were violence and sexual offences (227), anti-social behaviour (95) and other crime (94).

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 Caerphilly

These figures are published for the whole of Caerphilly, not for each middle area, so they describe all of Caerphilly and not North Blackwood, Argoed & Markham alone. See Caerphilly

Average house price
£197,542
Up 4.2% in a year
HM Land Registry · Jul 2026
Median full-time pay
£35,367
78th lowest paid of 348
ONS earnings survey · 2025
House price to pay
5.6×
Joint 65th most affordable of 348
Worked out by Open Index
Population estimate
176,078
Down 0.1% in a year
ONS population estimates · 2025
North Blackwood, Argoed & Markham in brief

The median price paid for a home in North Blackwood, Argoed & Markham was £245,000 in 2025.

North Blackwood, Argoed & Markham had 5,601 usual residents at the census.

About 79% of people in North Blackwood, Argoed & Markham live in a 1 km square that the radon atlas marks as a radon Affected Area.

In North Blackwood, Argoed & Markham, 92.2% of homes and businesses could get gigabit-capable broadband in January 2026.