12, Mount Stewart Avenue, Harrow occupies a 454 m² plot as recorded by HM Land Registry.

All 18 other houses in this postcode have recorded plot sizes, and this one ranks as the 5th largest.

12, Mount Stewart Avenue, Harrow has an Energy Performance Rating (EPC) of F. This is based on the most recent assessment, dated 12 May 2025.

The property is connected to mains gas and has fully double glazed windows. It is heated using Boiler and radiators, mains gas.

Land Registry records and our Estate Agent network show 3 sales of comparable properties within 650 metres of 12, Mount Stewart Avenue, Harrow across the last 2 years.

Most recently, 64, The Ridgeway, Harrow, HA3 0LL, a freehold house, sold at £945,000 on the 10th October 2025.

Read more about house prices in HA3.

• Sold Oct 2025£945,000 | 4 Bed House64, The Ridgeway, Harrow, HA3 0LL64, The Ridgeway, Harrow, HA3 0LL
• Sold Aug 2023£800,000 | 4 Bed House1, Sheridan Gardens, Harrow, HA3 0JT1, Sheridan Gardens, Harrow, HA3 0JT
• Sold Jul 2023£920,000 | 4 Bed House10, Mount Stewart Avenue, Harrow, HA3 0JP10, Mount Stewart Avenue, Harrow, HA3 0JP

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

Our analysis of the public data ranks 12, Mount Stewart Avenue, Harrow as the 36th largest and the 36th most expensive of the 56 addresses on Mount Stewart Avenue, Harrow, HA3.

Against the HA3 postcode district average, it is £257k more expensive than the typical property.

• 200

  m

  Mount Stewart Infant School
• 300

  m

  Mount Stewart Junior School
• 700

  m

  Uxendon Manor Primary School

• 600

  m

  St Gregory's Catholic Science College
• 1.0

  km

  Claremont High School
• 1.6

  km

  Harrow High School

• 900

  m

  South Kenton
• 900

  m

  Kenton
• 900

  m

  Northwick Park

Ofcom's latest figures show ultrafast broadband available in this area.

Environment Agency data suggests this area has a very low risk of flooding.