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Trefforest

Middle area

South east Rhondda Cynon Taf. 11,742 people (mid-2024 estimate) in 7.4 square kilometres.

Open in map

Radon Affected Area by middle area

Worked out by Open Index · 2022

Under 1%90% or more

About 100% of people in Trefforest live in a 1 km square that the radon atlas marks as a radon Affected Area.

Median sale price
£155,000
Joint 566th cheapest of 7,259
Worked out by Open Index
Population
10,431
862nd most populated of 9,448
ONS Census 2021 · 2021
People in radon Affected Area squares
100%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
90.2%
UK 87.8%
Ofcom · Jan 2026

Recorded crime in Trefforest

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Trefforest at a rate of 98.6 per 1,000 people.

That compares with 86.2 per 1,000 people across Rhondda Cynon Taf.

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 offences516
Other crime240
Anti-social behaviour101
Shoplifting83
Criminal damage and arson69
Vehicle crime53
Burglary51
Drug offences29
Robbery13
Theft from the person3

Source: police.uk, 12 months to August 2026

How Trefforest compares

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

TrefforestMiddle
Median sale price31 middle areas, Rhondda Cynon Taf · 2025
Median sale price: every middle area in Rhondda Cynon Taf31 areas from £90,000 to £275,000. The middle area is £140,000. Trefforest is £155,000.
£155,00014th most expensive
Population31 middle areas, Rhondda Cynon Taf · 2021
Population: every middle area in Rhondda Cynon Taf31 areas from 5,300 to 11,459. The middle area is 7,462. Trefforest is 10,431.
10,4312nd most populated
People in radon Affected Area squares31 middle areas, Rhondda Cynon Taf · 2022
People in radon Affected Area squares: every middle area in Rhondda Cynon Taf31 areas from 0.0% to 100.0%. The middle area is 100.0%. Trefforest is 100.0%.
100%joint most people in radon Affected Areas
Gigabit broadband coverage31 middle areas, Rhondda Cynon Taf · Jan 2026
Gigabit broadband coverage: every middle area in Rhondda Cynon Taf31 areas from 0.1% to 98.7%. The middle area is 91.4%. Trefforest is 90.2%.
90.2%14th lowest

Is Trefforest safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Trefforest at a rate of 98.6 per 1,000 people.

That compares with 86.2 per 1,000 people across Rhondda Cynon Taf.

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

In August 2026 alone, 88 cases of crime and anti-social behaviour were recorded in Trefforest.

In the 12 months to August 2026, the most common types were violence and sexual offences (516), other crime (240) and anti-social behaviour (101).

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 Rhondda Cynon Taf

These figures are published for the whole of Rhondda Cynon Taf, not for each middle area, so they describe all of Rhondda Cynon Taf and not Trefforest alone. See Rhondda Cynon Taf

Average house price
£164,192
Up 4.7% in a year
HM Land Registry · Jul 2026
Median full-time pay
£34,837
56th lowest paid of 348
ONS earnings survey · 2025
House price to pay
4.7×
Joint 34th most affordable of 348
Worked out by Open Index
Population estimate
241,015
Down 0.3% in a year
ONS population estimates · 2025
Trefforest in brief

The median price paid for a home in Trefforest was £155,000 in 2025.

Trefforest had 10,431 usual residents at the census.

About 100% of people in Trefforest live in a 1 km square that the radon atlas marks as a radon Affected Area.

In Trefforest, 90.2% of homes and businesses could get gigabit-capable broadband in January 2026.