20, Gloucester Avenue, Sidcup occupies a 257 m² plot as recorded by HM Land Registry.

All 24 other houses in this postcode have recorded plot sizes, and this one ranks as the 5th largest.

20, Gloucester Avenue, Sidcup has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 16 Feb 2025.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

20, Gloucester Avenue, Sidcup last changed hands on 11th September 2025, selling for £520,000. The transaction was logged as a leasehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has dropped by 13.4% since September 2025.

• Sold Sep 2025£520,000

Land Registry records and our Estate Agent network show 206 sales of comparable properties within 550 metres of 20, Gloucester Avenue, Sidcup since 2018.

Most recently, 92, Pinewood Avenue, Sidcup, DA15 8BD, a freehold house, sold at £539,000 on the 18th July 2025.

Read more about house prices in DA15.

• Sold Jul 2025£539,000 | 3 Bed House92, Pinewood Avenue, Sidcup, DA15 8BD92, Pinewood Avenue, Sidcup, DA15 8BD
• Sold May 2025£445,000 | 3 Bed House8, Woodside Crescent, Sidcup, DA15 7JJ8, Woodside Crescent, Sidcup, DA15 7JJ
• Sold Feb 2025£475,000 | 3 Bed House140, Woodside Road, Sidcup, DA15 7JG140, Woodside Road, Sidcup, DA15 7JG
• Sold Oct 2024£553,000 | 4 Bed House3, Pinewood Avenue, Sidcup, DA15 8BB3, Pinewood Avenue, Sidcup, DA15 8BB
• Sold Sep 2024£585,000 | 3 Bed House5, York Avenue, Sidcup, DA15 7LJ5, York Avenue, Sidcup, DA15 7LJ
• Sold Jul 2024£637,000 | 3 Bed House7, Pinewood Avenue, Sidcup, DA15 8BB7, Pinewood Avenue, Sidcup, DA15 8BB
• Sold Jul 2024£550,000 | 3 Bed House37, York Avenue, Sidcup, DA15 7LJ37, York Avenue, Sidcup, DA15 7LJ
• Sold Mar 2024£445,000 | 3 Bed House162, Old Farm Avenue, Sidcup, DA15 8AL162, Old Farm Avenue, Sidcup, DA15 8AL
• Sold Feb 2024£460,000 | 3 Bed House17, Pinewood Avenue, Sidcup, DA15 8BB17, Pinewood Avenue, Sidcup, DA15 8BB
• Sold Jan 2024£491,000 | 3 Bed House228, Old Farm Avenue, Sidcup, DA15 8AN228, Old Farm Avenue, Sidcup, DA15 8AN
• Sold Nov 2023£535,000 | 4 Bed House164, Old Farm Avenue, Sidcup, DA15 8AL164, Old Farm Avenue, Sidcup, DA15 8AL
• Sold Jun 2023£420,000 | 3 Bed House29, Woodside Crescent, Sidcup, DA15 7JJ29, Woodside Crescent, Sidcup, DA15 7JJ
• Sold Jun 2023£454,999 | 3 Bed House150, Woodside Road, Sidcup, DA15 7JG150, Woodside Road, Sidcup, DA15 7JG
• Sold Jan 2023£448,000 | 3 Bed House204, Old Farm Avenue, Sidcup, DA15 8AL204, Old Farm Avenue, Sidcup, DA15 8AL
• Sold Dec 2022£538,000 | 3 Bed House42, Gloucester Avenue, Sidcup, DA15 7LL42, Gloucester Avenue, Sidcup, DA15 7LL
• Sold Mar 2022£430,000 | 3 Bed House181, Old Farm Avenue, Sidcup, DA15 8AW181, Old Farm Avenue, Sidcup, DA15 8AW
• Sold Sep 2019£428,000 | 3 Bed House18, Little Birches, Sidcup, DA15 7LW18, Little Birches, Sidcup, DA15 7LW
• Sold Feb 2019£399,000 | 3 Bed House138, Old Farm Avenue, Sidcup, DA15 8AL138, Old Farm Avenue, Sidcup, DA15 8AL
• Sold Sep 2018£430,000 | 3 Bed House11, York Avenue, Sidcup, DA15 7LJ11, York Avenue, Sidcup, DA15 7LJ
• Sold Jun 2018£448,000 | 3 Bed House29, Little Birches, Sidcup, DA15 7LN29, Little Birches, Sidcup, DA15 7LN

Our analysis of the public data ranks 20, Gloucester Avenue, Sidcup as the 44th largest and the 61st most expensive of the 61 addresses on Gloucester Avenue, Sidcup, DA15.

Against the DA15 postcode district average, it is £36k less expensive than the typical property.

• Longlands Primary School

  300 m away
• Burnt Oak Junior School

  800 m away
• Dulverton Primary School

  800 m away

• Chislehurst and Sidcup Grammar School

  1.1 km away
• Hurstmere School

  1.7 km away
• Chislehurst School for Girls

  1.7 km away

• Sidcup

  |

  800 m away
• New Eltham

  |

  1.5 km away
• Albany Park

  |

  2.4 km away

Environment Agency data suggests this area has a Very Low risk of flooding.