SY20 Postcode Data
Property data for the SY20 postcode district covering Gwynedd. Sold prices, crime statistics, energy performance, and demographic insights, all from HM Land Registry, Police UK, and the EPC Register.
Quick answer
The average sale price in SY20 is £146,942 (median £128,000), based on 53 HM Land Registry transactions. Police UK recorded 0 crimes within a 1-mile radius in 2026-03. The average EPC rating across 71 certified properties is 47/100.
Headline pricing in SY20 is below the UK national average (England & Wales average ~£290k as of 2025). Stock is dominated by terraced properties (17 of the last 53 sales). Energy efficiency here is weaker than average (expect higher running costs and lower mortgage-affordability scores from green lenders).
Avg sale price
£146,942
53 sales
Median price
£128,000
Crime incidents
0
2026-03
Avg EPC score
47/100
71 certs
Recent sold prices
Latest 30 property sales in the SY20 area, sourced from HM Land Registry Price Paid Data.
terraced
£136,229
17 sales
semi-detached
£117,764
14 sales
detached
£144,250
12 sales
| Date | Address | Type | Price |
|---|---|---|---|
| May 2025 | 17 - 19, PENRALLT STREET, MACHYNLLETH | other | £200,000 |
| Feb 2025 | 5, PENRALLT STREET, MACHYNLLETH | other | £299,000 |
| Oct 2024 | UNIT 1, YR HEN NEUADD, PENRALLT STREET, MACHYNLLETH | other | £140,000 |
| Aug 2024 | MINFFORDD, PENRALLT STREET, MACHYNLLETH | detached | £340,000 |
| May 2024 | EAGLES YARD, PENRALLT STREET, MACHYNLLETH | other | £150,000 |
| Apr 2024 | 27, CHURCH PLACE, MACHYNLLETH | terraced | £62,239 |
| Mar 2024 | WYNNSTAY HOTEL, HEOL MAENGWYN, MACHYNLLETH | other | £480,000 |
| Jan 2024 | FLAT 1, PENRALLT COURT, PENRALLT STREET, MACHYNLLETH | other | £145,000 |
| Apr 2023 | 18, PENRALLT STREET, MACHYNLLETH | other | £370,000 |
| Dec 2022 | CROMPTON HOUSE, 9, PENRALLT STREET, MACHYNLLETH | other | £182,200 |
| Oct 2022 | 27, CHURCH PLACE, MACHYNLLETH | other | £70,239 |
| Mar 2022 | 5, PENRALLT ESTATE, MACHYNLLETH | semi-detached | £145,000 |
| Oct 2021 | ALBERT HOUSE, PENRALLT STREET, MACHYNLLETH | other | £55,900 |
| Jun 2021 | 7, PENRALLT STREET, MACHYNLLETH | terraced | £349,950 |
| Apr 2021 | 6, PENRALLT ESTATE, MACHYNLLETH | semi-detached | £166,750 |
Crime in SY20
0 reported crimes within a 1-mile radius of the postcode centroid in 2026-03, from Police UK data.
Energy performance
Aggregate EPC stats from 71 recently-certified properties in the SY20 area.
Avg current score
47/100
Avg potential
67/100
Avg energy cost
£1,322/yr
Sample size
71
Rating distribution
A
0
B
0
C
5
D
13
E
40
F
9
G
4
Area information
- Local authority
- Gwynedd, Ceredigion, Powys
- Country
- Wales
- Wards
- Corris a Mawddwy, Aberdyfi, Llanbrynmair
- Constituency
- Dwyfor Meirionnydd
- Latitude
- 52.6151
- Longitude
- -3.8185
More for SY20
Typical property
What the typical SY20 property looks like
Area summary, buyer notes, researched facts
Council tax
Gwynedd 2025/26 rates
All bands, monthly cost, discounts
Sold prices tool
Full transaction history for SY20
HM Land Registry from 1995
Corporate freeholders
Companies registered in SY20
Live Companies House data + PSCs
EPC checker
Look up any SY20 address
Energy ratings + improvement options
Crime checker
Local breakdown for SY20
Police UK monthly data
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Get a Property ReportData sources & methodology
Sold prices: HM Land Registry Price Paid Data, the official UK government records updated monthly. Sample uses the 30 most recent registered transactions in the postcode area.
Crime: Police UK street-level crime data. Counts cover a 1-mile radius from the SY20 postcode centroid for the most recent month available (typically 2 months behind).
EPC: opendatacommunities.org, the official UK Energy Performance Certificate register. Aggregate stats from up to 30 most recent certificates in the postcode.
Area data: postcodes.io, open data from the Office for National Statistics.