25C, Thornhill Square has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 09 Sep 2022.

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

According to HM Land Registry, 25C, Thornhill Square was last sold on 1st May 2015 for £470,000 and was recorded as a leasehold flat.

The property has had 2 sales since 1995.

Since May 2015, the market for similar properties has dropped by 2.5%.

• Sold May 2015£470,000
• Sold Aug 2000£130,000

According to the Land Registry and our network of Estate Agents, there have been 3 sales of properties similar to 25C, Thornhill Square within a radius of 310 metres over the last 2 years.

The most recent example is Flat A, 17, Huntingdon Street, London, N1 1BS, a leasehold flat which sold for £460,000 on the 28th November 2025.

Read more about house prices in N1.

• Sold Nov 2025£460,000 | 1 Bed FlatFlat A, 17, Huntingdon Street, London, N1 1BSFlat A, 17, Huntingdon Street, London, N1 1BS
• Sold Feb 2024£585,000 | 1 Bed Flat32C , Thornhill Square, London, N1 1BQ32C , Thornhill Square, London, N1 1BQ
• Sold Dec 2022£412,000 | 1 Bed Flat22C , Huntingdon Street, London, N1 1BS22C , Huntingdon Street, London, N1 1BS

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

Our network of Estate Agents reports 1 let of a property similar to 25C, Thornhill Square within a radius of 310 metres over the last 2 years.

Most recently, 242A, Caledonian Road, London, N1 0NG, a leasehold flat, was let by Fine Living in November 2020.

• 
  Let Nov 2020£ Undisclosed | 1 Bed Flat242A, Caledonian Road, London, N1 0NG242A, Caledonian Road, London, N1 0NG

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

Thornhill Square, London, N1 has a total of 102 addresses. According to our analysis of all the public data, 25C, Thornhill Square is the 93rd largest and the 89th most expensive property on the street.

When compared to the postcode district it is £279k less expensive than the average property in N1.

• 200

  m

  St Andrew's (Barnsbury) CofE Primary School
• 300

  m

  Thornhill Primary School
• 500

  m

  Vittoria Primary School

• 800

  m

  Elizabeth Garrett Anderson School
• 1.2

  km

  City of London Academy Islington
• 1.5

  km

  Regent High School

• 300

  m

  Caledonian Road & Barnsbury
• 1.0

  km

  Caledonian Road
• 1.0

  km

  Angel

According to recent data from Ofcom, superfast broadband is available in this area.

According to data from the Environment Agency, the flood risk in this area is considered to be very low.