Our Data Sources
20, William Street, Swansea has no records in the the Land Registry and a single entry in the EPC database dated April 2015.
We combine this information with public data of neighbouring properties to estimate the property attributes and values.
The local information is scored as 3 out of 5 and is considered of medium accuracy.
Price Range & Condition
The condition of a property plays an important role in determining its value, with the degree of impact varying by property type, size and location.
For 20, William Street, Swansea, we estimate a market value of £182,116 and a rental value of £808 per month when presented in very good decorative order. Should the property require extensive cosmetic improvement, those figures would reduce to £161,302 and £716 per month respectively.
Plot Size
HM Land Registry records the plot of land for 20, William Street, Swansea as measuring 59 m2.
That makes it the 30th largest plot in the postcode, where 30 of the 32 other houses have recorded plot data.
Energy Efficiency
20, William Street, Swansea has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 16 Apr 2015.
The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.
Similar Properties Sold Nearby
Over the past 2 years 191 properties similar to 20, William Street, Swansea have sold within a radius of 470 metres, per the Land Registry and our network of Estate Agents.
The latest, on the 23rd January 2026, was 5, Recorder Street, Swansea, SA1 3RX, a freehold house which sold for £145,000.
Read more about house prices in SA1.
- Sold Jan 2026£145,000 | 3 Bed House5, Recorder Street, Swansea, SA1 3RX5, Recorder Street, Swansea, SA1 3RX
- Sold Dec 2025£180,000 | 3 Bed House9, Glamorgan Street, Swansea, SA1 3SY9, Glamorgan Street, Swansea, SA1 3SY
- Sold Dec 2024£176,000 | 3 Bed House7, Recorder Street, Swansea, SA1 3RX7, Recorder Street, Swansea, SA1 3RX
•Nearby is defined as the radius comprising the nearest 2,000 addresses.
More reading links
Location Comparison
Of the 62 addresses on William Street, Swansea, SA1, 20, William Street, Swansea comes out as the 10th largest and the 10th most expensive in our analysis of the public data.
It is also £22k more expensive than the average property across the SA1 district.
More reading links
Schools Nearby
Public Transport Nearby
- Swansea|1.1 km away
- Llansamlet|6.7 km away
- Gowerton|7.0 km away
Available Internet Speeds
Broadband here reaches ultrafast speeds, based on recent Ofcom data.
According to recent data from Ofcom, Ultrafast Broadband is available in the area.
Risk of Flooding
The flood risk here is rated Very Low, based on Environment Agency data.
