According to data from HM Land Registry, 30, William Street, Swansea sits on a plot of 140 m².

We have plot size data on 30 out of 32 other houses in the postcode and 30, William Street, Swansea sits on the 6th largest plot.

30, William Street, Swansea has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 24 Mar 2025.

The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.

According to the Land Registry and our network of Estate Agents, there have been 151 sales of properties similar to 30, William Street, Swansea within a radius of 470 metres over the last 2 years.

The most recent example is 5, Recorder Street, Swansea, SA1 3RX, a freehold house which sold for £145,000 on the 23rd January 2026.

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 2024£176,000 | 3 Bed House7, Recorder Street, Swansea, SA1 3RX7, Recorder Street, Swansea, SA1 3RX
• Sold Jun 2023£185,000 | 3 Bed House27, Recorder Street, Swansea, SA1 3RX27, Recorder Street, Swansea, SA1 3RX

•Nearby is defined as the radius comprising the nearest 2,000 addresses.

William Street, Swansea, SA1 has a total of 62 addresses. According to our analysis of all the public data, 30, William Street, Swansea is the 19th largest and the 19th most expensive property on the street.

When compared to the postcode district it is £10k more expensive than the average property in SA1.

• Swansea

  |

  1.1 km away
• Llansamlet

  |

  6.7 km away
• Gowerton

  |

  7.0 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.