# SY20

Postcode district covering Machynlleth, in Powys and Gwynedd.

SY20 is a postcode district covering Machynlleth, in Powys and Gwynedd. Median sale price £195,000 in 2025. Recorded crime 45.8 per 1,000 people.

Postcode district. Code SY20. In: [Postcodes](https://openindex.co.uk/postcode) › [SY](https://openindex.co.uk/postcode/sy)

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 SY20 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £195,000** (2025). The median price paid for a home in SY20 was £195,000 in 2025. Joint 339th cheapest of 2,235. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/postcode/sy20#f-house-sales-median-price
- **Population: 6,672** (2021). SY20 had 6,672 usual residents at the census (ONS Census 2021). 553rd least populated of 2,756. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/postcode/sy20#f-population
- **People in radon Affected Area squares: 100%** (2022). About 100% of people in SY20 live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/postcode/sy20#f-radon-affected-share
- **Gigabit broadband coverage: 73.0%** (January 2026). In SY20, 73.0% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/postcode/sy20#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=SY20) (Worked out by Open Index · 2022): About 100% of people in SY20 live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Sales per year by postcode district](https://openindex.co.uk/map/house-sales-per-year?place=SY20) (Worked out by Open Index · 2025): 77 homes were sold in SY20 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=SY20) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for SY20.
- [Population by postcode district](https://openindex.co.uk/map/population?place=SY20) (Census 2021, England and Wales): SY20 had 6,672 usual residents at the census.

## How SY20 compares

Each postcode district against every other postcode district the measure covers.

| Measure | SY20 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £195,000 | 2nd cheapest | 25 postcode districts, SY · 2025 |
| Population | 6,672 | 8th least populated | 25 postcode districts, SY · 2021 |
| People in radon Affected Area squares | 100% | joint most people in radon Affected Areas | 25 postcode districts, SY · 2022 |
| Gigabit broadband coverage | 73.0% | 11th highest | 25 postcode districts, SY · Jan 2026 |

## Is SY20 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in SY20 at a rate of 45.8 per 1,000 people.
That compares with 66.4 per 1,000 people across the SY postcode area.
In August 2026 alone, 39 cases of crime and anti-social behaviour were recorded in SY20.
In the 12 months to August 2026, the most common types were violence and sexual offences (143), other crime (59) and anti-social behaviour (40).
A year earlier, the recorded crime rate in SY20 was 46.2 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 SY20, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so SY20 has no single figure. Of its 3 neighbourhoods with a rank:
- Decile 4: 1 neighbourhood
- Decile 5: 1 neighbourhood
- Decile 6: 1 neighbourhood

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

## Neighbourhoods in SY20

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Gwynedd 015B](https://openindex.co.uk/gwynedd/neighbourhood/w01000060) | 1,254 | 40.6 per 1,000 | 4 | 46.3% |
| [Powys 004A](https://openindex.co.uk/powys/neighbourhood/w01000442) | 2,055 | 23.4 per 1,000 | 5 | 78.8% |
| [Powys 004C](https://openindex.co.uk/powys/neighbourhood/w01000473) | 2,161 | 78.6 per 1,000 | 6 | 87.3% |

## Your MP

- [Montgomeryshire and Glyndŵr](https://openindex.co.uk/constituency/montgomeryshire-and-glyndwr): Steve Witherden (Labour), MP since July 2024. 57% of the people here.
- [Dwyfor Meirionnydd](https://openindex.co.uk/constituency/dwyfor-meirionnydd): Liz Saville Roberts (Plaid Cymru), MP since July 2024. 34% of the people here.
- [Ceredigion Preseli](https://openindex.co.uk/constituency/ceredigion-preseli): Ben Lake (Plaid Cymru), MP since July 2024. 8.8% of the people here.

As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

## Middle areas in SY20

[Machynlleth & Banwy](https://openindex.co.uk/powys/machynlleth-and-banwy)

## Postcode sectors in SY20

[SY20 0 (1 postcode)](https://openindex.co.uk/postcode/sy20-0), [SY20 8 (235 postcodes)](https://openindex.co.uk/postcode/sy20-8), [SY20 9 (185 postcodes)](https://openindex.co.uk/postcode/sy20-9)

## Councils SY20 covers

[Powys](https://openindex.co.uk/powys), [Gwynedd](https://openindex.co.uk/gwynedd)

## Postcode districts next to SY20

[LL23](https://openindex.co.uk/postcode/ll23), [LL35](https://openindex.co.uk/postcode/ll35), [LL36](https://openindex.co.uk/postcode/ll36), [LL40](https://openindex.co.uk/postcode/ll40), [SY10](https://openindex.co.uk/postcode/sy10), [SY19](https://openindex.co.uk/postcode/sy19), [SY21](https://openindex.co.uk/postcode/sy21), [SY23](https://openindex.co.uk/postcode/sy23), [SY24](https://openindex.co.uk/postcode/sy24)

## Nearest rail stations

[Machynlleth (4.5 km from the middle)](https://openindex.co.uk/map/rail-stations?around=-3.8545,52.5951)

## More in the SY postcode area

[All SY postcode districts](https://openindex.co.uk/postcode/sy), [Every UK postcode area](https://openindex.co.uk/postcode)

## SY20 in brief

SY20 is a postcode district covering Machynlleth, in Powys and Gwynedd.
About 6,663 people lived in SY20 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £195,000 in 2025 across 77 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 45.8 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in SY20 was £195,000 in 2025.
SY20 had 6,672 usual residents at the census.
About 100% of people in SY20 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In SY20, 73.0% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: SY20
- Postcode area: [SY](https://openindex.co.uk/postcode/sy)
- Constituency: [Montgomeryshire and Glyndwr †](https://openindex.co.uk/constituency/montgomeryshire-and-glyndwr)
- Council: [Powys †](https://openindex.co.uk/powys)
- Area: 498 km²
- People, mid-2024: 6,663*
- Neighbourhoods: 3
- Output areas: 23

* People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact.
† Best fit: the constituency, council and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[SY19](https://openindex.co.uk/postcode/sy19), [LL36](https://openindex.co.uk/postcode/ll36), [SY24](https://openindex.co.uk/postcode/sy24), [LL40](https://openindex.co.uk/postcode/ll40), [SY23](https://openindex.co.uk/postcode/sy23), [SY21](https://openindex.co.uk/postcode/sy21)

## Latest updates for SY20

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Dental practices updated: NHS England · Oct 2026.
- Schools updated: Ofsted · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/SY20

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/sy20, or to one figure with its anchor, https://openindex.co.uk/postcode/sy20#f-house-sales-median-price.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/postcode/sy20