21, St. Margarets Avenue, Sidcup occupies a 293 m² plot as recorded by HM Land Registry.

All 34 other houses in this postcode have recorded plot sizes, and this one ranks as the 23rd largest.

21, St. Margarets Avenue, Sidcup has an Energy Performance Rating (EPC) of E. This is based on the most recent assessment, dated 17 Dec 2010.

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

21, St. Margarets Avenue, Sidcup last changed hands on 28th April 2011, selling for £235,000. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

The market for similar properties has risen by 60.4% since April 2011.

Land Registry records and our Estate Agent network show 87 sales of comparable properties within 620 metres of 21, St. Margarets Avenue, Sidcup since 2007.

Most recently, 15, Shirley Road, Sidcup, DA15 7JW, a freehold house, sold at £472,000 on the 13th March 2026.

Read more about house prices in DA15.

• Sold Mar 2026£472,000 | 3 Bed House15, Shirley Road, Sidcup, DA15 7JW15, Shirley Road, Sidcup, DA15 7JW
• Sold Feb 2026£525,000 | 3 Bed House299, Old Farm Avenue, Sidcup, DA15 8AA299, Old Farm Avenue, Sidcup, DA15 8AA
• Sold Nov 2025£430,000 | 3 Bed House11, Shirley Road, Sidcup, DA15 7JW11, Shirley Road, Sidcup, DA15 7JW
• Sold Sep 2025£450,000 | 3 Bed House2, Partridge Road, Sidcup, DA14 6RS2, Partridge Road, Sidcup, DA14 6RS
• Sold Aug 2025£526,000 | 3 Bed House8, St. Margarets Avenue, Sidcup, DA15 7NP8, St. Margarets Avenue, Sidcup, DA15 7NP
• Sold Jun 2025£470,000 | 3 Bed House21, Chartwell Close, London, SE9 3UQ21, Chartwell Close, London, SE9 3UQ
• Sold Mar 2025£418,000 | 3 Bed House11, Woodchurch Close, Sidcup, DA14 6QH11, Woodchurch Close, Sidcup, DA14 6QH
• Sold Jan 2025£500,000 | 3 Bed House9, Chartwell Close, London, SE9 3UQ9, Chartwell Close, London, SE9 3UQ
• Sold Jan 2025£438,000 | 3 Bed House16, Bedford Road, Sidcup, DA15 7JP16, Bedford Road, Sidcup, DA15 7JP
• Sold Nov 2024£625,000 | 3 Bed House10, Chartwell Close, London, SE9 3UQ10, Chartwell Close, London, SE9 3UQ
• Sold Jul 2024£450,000 | 3 Bed House24, Chartwell Close, London, SE9 3UQ24, Chartwell Close, London, SE9 3UQ
• Sold Sep 2022£522,500 | 3 Bed House60, Harland Avenue, Sidcup, DA15 7PQ60, Harland Avenue, Sidcup, DA15 7PQ
• Sold May 2022£445,000 | 3 Bed House74, Harland Avenue, Sidcup, DA15 7PQ74, Harland Avenue, Sidcup, DA15 7PQ
• Sold Apr 2022£485,000 | 3 Bed House22, Chartwell Close, London, SE9 3UQ22, Chartwell Close, London, SE9 3UQ
• Sold Jun 2021£342,000 | 3 Bed House127, Harland Avenue, Sidcup, DA15 7NZ127, Harland Avenue, Sidcup, DA15 7NZ
• Sold Apr 2019£440,000 | 3 Bed House11, Chartwell Close, London, SE9 3UQ11, Chartwell Close, London, SE9 3UQ
• Sold Mar 2016£392,500 | 3 Bed House106, Longlands Park Crescent, Sidcup, DA15 7NQ106, Longlands Park Crescent, Sidcup, DA15 7NQ
• Sold Aug 2013£280,000 | 3 Bed House43, Brooklands Avenue, Sidcup, DA15 7PF43, Brooklands Avenue, Sidcup, DA15 7PF
• Sold Nov 2012£286,000 | 3 Bed House80, Harland Avenue, Sidcup, DA15 7PQ80, Harland Avenue, Sidcup, DA15 7PQ
• Sold Jul 2007£267,000 | 3 Bed House34, St. Margarets Avenue, Sidcup, DA15 7NP34, St. Margarets Avenue, Sidcup, DA15 7NP

Our analysis of the public data ranks 21, St. Margarets Avenue, Sidcup as the 29th largest and the 29th most expensive of the 34 addresses on St. Margarets Avenue, Sidcup, DA15.

Against the DA15 postcode district average, it is £12k less expensive than the typical property.

• Dulverton Primary School

  500 m away
• Longlands Primary School

  600 m away
• Edgebury Primary School

  900 m away

• Chislehurst School for Girls

  1.6 km away
• Chislehurst and Sidcup Grammar School

  1.9 km away
• St Thomas More Catholic Comprehensive School

  2.3 km away

• New Eltham

  |

  1.0 km away
• Sidcup

  |

  1.5 km away
• Mottingham

  |

  2.3 km away

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