HM Land Registry records the plot of land for 21, Castle Bay, Folkestone as measuring 154 m².

That makes it the 23rd largest plot in the postcode, where 26 of the 27 other houses have recorded plot data.

21, Castle Bay, Folkestone has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 18 Feb 2014.

The property is not connected to mains gas and has fully double glazed windows. It is heated using warm air (electricaire).

Since 2013 142 properties similar to 21, Castle Bay, Folkestone have sold within a radius of 1.1 kilometres, per the Land Registry and our network of Estate Agents.

The latest, on the 12th December 2025, was 19, Seabrook Court, Hythe, CT21 5RY, a freehold house which sold for £395,000.

Read more about house prices in CT20.

• Sold Dec 2025£395,000 | 3 Bed House19, Seabrook Court, Hythe, CT21 5RY19, Seabrook Court, Hythe, CT21 5RY
• Sold Nov 2025£310,000 | 3 Bed House75, Seabrook Court, Hythe, CT21 5RY75, Seabrook Court, Hythe, CT21 5RY
• Sold Aug 2025£385,000 | 3 Bed House4, Sunnyside Road, Folkestone, CT20 3DR4, Sunnyside Road, Folkestone, CT20 3DR
• Sold Apr 2025£420,000 | 3 Bed House16, Castle Bay, Folkestone, CT20 3DU16, Castle Bay, Folkestone, CT20 3DU
• Sold Jan 2024£425,000 | 3 Bed House49, Seabrook Court, Hythe, CT21 5RY49, Seabrook Court, Hythe, CT21 5RY
• Sold Jan 2024£478,000 | 3 Bed House65, Seabrook Court, Hythe, CT21 5RY65, Seabrook Court, Hythe, CT21 5RY
• Sold Sep 2022£370,000 | 3 Bed House43, Castle Bay, Folkestone, CT20 3DU43, Castle Bay, Folkestone, CT20 3DU
• Sold Feb 2022£362,000 | 3 Bed House3, Cromwell Park Place, Folkestone, CT20 3SB3, Cromwell Park Place, Folkestone, CT20 3SB
• Sold Sep 2021£325,000 | 3 Bed House59, Seabrook Court, Hythe, CT21 5RY59, Seabrook Court, Hythe, CT21 5RY
• Sold Mar 2021£373,000 | 3 Bed House33, Castle Bay, Folkestone, CT20 3DU33, Castle Bay, Folkestone, CT20 3DU
• Sold Jan 2021£290,000 | 3 Bed House69, Seabrook Court, Hythe, CT21 5RY69, Seabrook Court, Hythe, CT21 5RY
• Sold Mar 2020£262,000 | 3 Bed House11, Castle Bay, Folkestone, CT20 3DU11, Castle Bay, Folkestone, CT20 3DU
• Sold Oct 2019£342,000 | 3 Bed House61, Seabrook Court, Hythe, CT21 5RY61, Seabrook Court, Hythe, CT21 5RY
• Sold Feb 2019£330,000 | 3 Bed House51, Seabrook Court, Hythe, CT21 5RY51, Seabrook Court, Hythe, CT21 5RY
• Sold Feb 2017£218,000 | 3 Bed House18, Castle Bay, Folkestone, CT20 3DU18, Castle Bay, Folkestone, CT20 3DU
• Sold Mar 2016£237,500 | 3 Bed House34, Castle Bay, Folkestone, CT20 3DU34, Castle Bay, Folkestone, CT20 3DU
• Sold Mar 2016£270,000 | 3 Bed House41, Castle Bay, Folkestone, CT20 3DU41, Castle Bay, Folkestone, CT20 3DU
• Sold Feb 2015£269,000 | 3 Bed House14, Castle Bay, Folkestone, CT20 3DU14, Castle Bay, Folkestone, CT20 3DU
• Sold Feb 2014£205,000 | 3 Bed House35, Castle Bay, Folkestone, CT20 3DU35, Castle Bay, Folkestone, CT20 3DU
• Sold Nov 2013£274,000 | 3 Bed House13, Castle Bay, Folkestone, CT20 3DU13, Castle Bay, Folkestone, CT20 3DU

Of the 50 addresses on Castle Bay, Sandgate, Folkestone, CT20, 21, Castle Bay, Folkestone comes out as the 17th largest and the 17th most expensive in our analysis of the public data.

It is also £86k more expensive than the average property across the CT20 district.

• Seabrook Church of England Primary School

  800 m away
• Folkestone, St Martin's Church of England Primary School

  1.5 km away
• Sandgate Primary School

  1.6 km away

• The Folkestone School for Girls

  1.4 km away
• Turner Free School

  2.3 km away
• The Harvey Grammar School

  2.3 km away

• Folkestone West

  |

  2.0 km away
• Folkestone Central

  |

  2.9 km away
• Sandling

  |

  5.0 km away

The flood risk here is rated Very Low, based on Environment Agency data.