21, Windmill Avenue, St. Albans occupies a 295 m² plot as recorded by HM Land Registry.

All 17 other houses in this postcode have recorded plot sizes, and this one ranks as the 9th largest.

21, Windmill Avenue, St. Albans has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 18 Jun 2021.

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

21, Windmill Avenue, St. Albans last changed hands on 24th November 2021, selling for £490,200. 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 dropped by 10.1% since November 2021.

• Sold Nov 2021£490,200

Land Registry records and our Estate Agent network show 45 sales of comparable properties within 580 metres of 21, Windmill Avenue, St. Albans since 2015.

Most recently, 16, Chiltern Road, St. Albans, AL4 9TE, a freehold house, sold at £625,000 on the 23rd May 2025.

Read more about house prices in AL4.

• Sold May 2025£625,000 | 2 Bed House16, Chiltern Road, St. Albans, AL4 9TE16, Chiltern Road, St. Albans, AL4 9TE
• Sold Mar 2025£508,300 | 2 Bed House95, Richmond Walk, St. Albans, AL4 9BB95, Richmond Walk, St. Albans, AL4 9BB
• Sold Jan 2025£495,000 | 3 Bed House65, Richmond Walk, St. Albans, AL4 9BB65, Richmond Walk, St. Albans, AL4 9BB
• Sold Dec 2024£480,000 | 2 Bed House23, Larkswood Rise, St. Albans, AL4 9JU23, Larkswood Rise, St. Albans, AL4 9JU
• Sold Jul 2024£300,000 | 2 Bed House20, Cheriton Close, St. Albans, AL4 9HU20, Cheriton Close, St. Albans, AL4 9HU
• Sold Mar 2024£485,000 | 2 Bed House23, Windmill Avenue, St. Albans, AL4 9SH23, Windmill Avenue, St. Albans, AL4 9SH
• Sold Jan 2024£450,000 | 2 Bed House21, Craiglands, St. Albans, AL4 9AH21, Craiglands, St. Albans, AL4 9AH
• Sold Dec 2023£550,000 | 2 Bed House21, Twyford Road, St. Albans, AL4 9BD21, Twyford Road, St. Albans, AL4 9BD
• Sold Jul 2023£560,000 | 2 Bed House69, Windmill Avenue, St. Albans, AL4 9SJ69, Windmill Avenue, St. Albans, AL4 9SJ
• Sold Jun 2023£468,500 | 2 Bed House20, Craiglands, St. Albans, AL4 9AH20, Craiglands, St. Albans, AL4 9AH
• Sold May 2021£460,000 | 2 Bed House29, Windmill Avenue, St. Albans, AL4 9SH29, Windmill Avenue, St. Albans, AL4 9SH
• Sold Jun 2018£420,000 | 2 Bed House67, Windmill Avenue, St. Albans, AL4 9SJ67, Windmill Avenue, St. Albans, AL4 9SJ
• Sold Jun 2018£377,500 | 2 Bed House76, Harness Way, St. Albans, AL4 9HB76, Harness Way, St. Albans, AL4 9HB
• Sold May 2018£425,000 | 2 Bed House73, Windmill Avenue, St. Albans, AL4 9SJ73, Windmill Avenue, St. Albans, AL4 9SJ
• Sold Jan 2017£525,000 | 2 Bed House75, Windmill Avenue, St. Albans, AL4 9SJ75, Windmill Avenue, St. Albans, AL4 9SJ
• Sold Nov 2016£470,000 | 2 Bed House25, Windmill Avenue, St. Albans, AL4 9SH25, Windmill Avenue, St. Albans, AL4 9SH
• Sold Mar 2016£450,000 | 2 Bed House9, Windmill Avenue, St. Albans, AL4 9SH9, Windmill Avenue, St. Albans, AL4 9SH
• Sold Aug 2015£410,000 | 2 Bed House5, Windmill Avenue, St. Albans, AL4 9SH5, Windmill Avenue, St. Albans, AL4 9SH
• Sold Jul 2015£385,000 | 3 Bed House6, Twyford Road, St. Albans, AL4 9BD6, Twyford Road, St. Albans, AL4 9BD
• Sold Mar 2015£377,000 | 2 Bed House19, Windmill Avenue, St. Albans, AL4 9SH19, Windmill Avenue, St. Albans, AL4 9SH

Agents in our network have reported 4 lettings within 580 metres of 21, Windmill Avenue, St. Albans across the last 2 years.

The newest of these is 24, Wilstone Drive, St. Albans, AL4 9TT, a freehold house let by Collinson Hall in November 2025.

• 
  Let agreed Nov 2025£ Undisclosed | 2 Bed House24, Wilstone Drive, St. Albans, AL4 9TT24, Wilstone Drive, St. Albans, AL4 9TT
• 
  Let agreed Dec 2023£ Undisclosed | 4 Bed House5, Middlefield Close, St. Albans, AL4 9RZ5, Middlefield Close, St. Albans, AL4 9RZ
• 
  Let agreed Jul 2023£ Undisclosed | 3 Bed House89, Harvesters, St. Albans, AL4 9QX89, Harvesters, St. Albans, AL4 9QX
• 
  Let agreed May 2023£ Undisclosed | 4 Bed House6, Chancery Close, St. Albans, AL4 9YF6, Chancery Close, St. Albans, AL4 9YF

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

Our analysis of the public data ranks 21, Windmill Avenue, St. Albans as the 104th largest and the 86th most expensive of the 119 addresses on Windmill Avenue, St. Albans, AL4.

Against the AL4 postcode district average, it is £137k less expensive than the typical property.

• Skyswood Primary & Nursery School

  300 m away
• St John Fisher Catholic Primary School, a Voluntary Academy

  400 m away
• Wheatfields Junior Mixed School

  900 m away

• Sandringham School

  600 m away
• Beaumont School

  1.5 km away
• Verulam School

  1.9 km away

• St Albans City

  |

  2.8 km away
• St Albans Abbey

  |

  4.0 km away
• Park Street

  |

  5.6 km away

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