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SY21

Postcode district

Postcode district covering Welshpool and Burgess Lands, in Powys.

Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an SY21 postcode. How census figures are added up

Open in map

Radon Affected Area by postcode district

Worked out by Open Index · 2022

Under 1%90% or more

About 100% of people in SY21 live in a 1 km square that the radon atlas marks as a radon Affected Area.

Median sale price
£235,000
Joint 636th cheapest of 2,235
Worked out by Open Index
Population
16,996
1,114th least populated of 2,756
ONS Census 2021 · 2021
People in radon Affected Area squares
100%
UK 44%
Worked out by Open Index
Gigabit broadband coverage
68.8%
UK 87.8%
Ofcom · Jan 2026

How SY21 compares

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

SY21Middle
Median sale price25 postcode districts, SY · 2025
Median sale price: every postcode district in SY25 areas from £180,000 to £395,000. The middle area is £259,125. SY21 is £235,000.
£235,0009th cheapest
Population25 postcode districts, SY · 2021
Population: every postcode district in SY25 areas from 1,157 to 35,085. The middle area is 11,060. SY21 is 16,996.
16,99610th most populated
People in radon Affected Area squares25 postcode districts, SY · 2022
People in radon Affected Area squares: every postcode district in SY25 areas from 7.0% to 100.0%. The middle area is 100.0%. SY21 is 100.0%.
100%joint most people in radon Affected Areas
Gigabit broadband coverage25 postcode districts, SY · Jan 2026
Gigabit broadband coverage: every postcode district in SY25 areas from 30.4% to 95.8%. The middle area is 69.4%. SY21 is 68.8%.
68.8%12th lowest

Is SY21 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SY21 at a rate of 76.6 per 1,000 people.

That compares with 66.4 per 1,000 people across the SY postcode area.

In August 2026 alone, 109 cases of crime and anti-social behaviour were recorded in SY21.

In the 12 months to August 2026, the most common types were violence and sexual offences (571), anti-social behaviour (298) and other crime (208).

A year earlier, the recorded crime rate in SY21 was 67.8 per 1,000 people.

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.

Deprivation in SY21, neighbourhood by neighbourhood

  • Deprivation is ranked by neighbourhood, so SY21 has no single figure. Of its 10 neighbourhoods with a rank:
  • Decile 2: 1 neighbourhood
  • Decile 4: 2 neighbourhoods
  • Decile 6: 2 neighbourhoods
  • Decile 7: 3 neighbourhoods
  • Decile 8: 2 neighbourhoods

Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales.

Neighbourhoods in SY21

NamePeople (census)Recorded crime per 1,000Deprivation decileGigabit broadband
Powys 002A2,25844.4 per 1,000891.6%
Powys 003A1,488200.1 per 1,000289.9%
Powys 003B1,236154.7 per 1,000482.4%
Powys 003C1,71255.2 per 1,000793.8%
Powys 003D2,20283.3 per 1,000693.1%
Powys 004B1,99427.4 per 1,000473.0%
Powys 005A1,33917.4 per 1,000791.0%
Powys 005B1,53625.9 per 1,000880.6%
Powys 005D1,37461.7 per 1,000739.5%
Powys 006B1,706140.2 per 1,00068.8%

MPs for SY21

As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

Middle areas in SY212

Postcode sectors in SY215

Council1

Postcode districts next to SY218

Nearest rail stations1

More in the SY postcode area2

SY21 in brief

SY21 is a postcode district covering Welshpool and Burgess Lands, in Powys.

About 17,348 people lived in SY21 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £235,000 in 2025 across 195 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 76.6 per 1,000 people in the 12 months to August 2026 (police.uk).

The median price paid for a home in SY21 was £235,000 in 2025.

SY21 had 16,996 usual residents at the census.

About 100% of people in SY21 live in a 1 km square that the radon atlas marks as a radon Affected Area.

In SY21, 68.8% of homes and businesses could get gigabit-capable broadband in January 2026.