11, Castle Square, SA3 4BJ

11 Castle Square is a 91 m² / 980 sq ft terraced home in Mumbles. It sold for £257,500 in August 2025. Indexed forward to today's value, that sale is roughly £263k. Recent local prices imply a broad valuation context of £287k to £384k based on its internal area. The Land Registry and EPC data was last updated 2 July 2026.

Property data
Sale history
Date Paid price Annual growth After inflation
Aug 2025 £257,500 11.5% 7.4%
Mar 2024 £220,000 na na
Floor plan

Archived estate agent floor plan for 11, Castle Square.

Floorplan 11
View floorplan
Internal area
91 square metres (980 square feet) according to latest EPC inspection
Price per internal area

This property sold for £2,829 per square metre (£263 per square foot) in Aug 2025. Indexed forward to today's value, this is roughly £2,893 per square metre (£269 per square foot) .

Date Paid price Paid £/sqm Today's value Today's value £/sqm
Aug 2025 £257,500 £2,830 £263,295 £2,893
Mar 2024 £220,000 £2,418 £220,595 £2,424

Calculated using the latest EPC internal area of 91 m². Earlier sale dates may not have had the same measured area available.

Valuation
The most recent sale price indexed forward to today's value is £263,295. This is one data point to inform the valuation. Another method is the valuation implied by what comparable homes are selling for. Homes in Mumbles are now selling for between £3,150 and £4,220 per square metre (£292 and £392 per square foot). Based on an internal area of 91 m², this implies a valuation between £287,000 and £384,000. Treat this as context only. For a valuation using hand-picked comparable sales, use the Advanced search tool — create a shortlist of similar condition homes, then export a valuation report.
Bedrooms
3
Type
Terrace
Council tax band
D
Plot size
66 square metres (710 square feet) - map showing freehold boundary lines
Archived listings
History:
Archived sales listing for 11 Castle Square. Advertised on multiple portals. It was reduced on 28/06/2023. It last appeared Sep 2023.
Photos:

There are 15 archived estate agent listing photos for 11 Castle Square.

Photos for 11 Castle Square
View photos
Advertiser remarks:
  • 2 bedrooms
  • 1 bathrooms
EPC Inspections
Summary:
26 June 2023 - energy performance certificate grade D
Certificate:
View energy certificate on GOV.UK
Reason for EPC:
Marketed sale
Tenure:
Owner-occupied
Property type:
End-Terrace House , has 5 habitable rooms. Estimated year built 1900 to 1929
Area:
91 sqm (980 square foot) total internal area
Comments:
Walls: Cavity wall, as built, no insulation (assumed). Roof: Pitched, 270 mm loft insulation. Heating: Boiler and radiators, mains gas.
Frequently asked questions

11 Castle Square is worth whatever price a willing buyer and seller agree upon. However, the following can provide useful context.

  • HouseMetric estimates the most recent sale price indexed forward to today's value is £263,295.
  • Based on an internal area of 91 m² and recent prices in Mumbles, this implies a lower and upper quartile range from £287,000 to £384,000, using HouseMetric's implied valuation methodology.

According to HM Land Registry price paid data, 11 Castle Square last sold for £257,500 in August 2025.

HouseMetric shows 11 Castle Square as 91 m² (980 sq ft), based on the latest internal area data available for this property. The bedroom count is shown as 3 bedrooms. Bedroom numbers can come from a previous estate agency listing, an EPC record, or an estimate based on the size of the property.

The latest EPC rating shown by HouseMetric is D, from an inspection dated 26 June 2023. EPC information comes from the public Energy Performance Certificate data for England and Wales.

When we last checked, 11 Castle Square was in council tax band D. Council Tax bands can change, so check the latest Valuation Office Agency Council Tax list.

11 Castle Square is in postcode SA3 4BJ, in Mumbles. You can also view HouseMetric's sold-price page for Castle Square, SA3 4BJ or analysis of the Mumbles property market.

HouseMetric combines HM Land Registry price paid data, Energy Performance Certificate data and Ordnance Survey/open data. The data were last updated 2 July 2026. Figures such as indexed values and local valuation ranges are calculated estimates for context, while official records can change as public datasets are updated.

For more detail on HouseMetric data sources, update frequency and valuation methods, see the HouseMetric FAQs.