According to data from HM Land Registry, 21D, Castle Street, Sleaford sits on a plot of 73 m².

We have plot size data on 18 out of 26 other houses in the postcode and 21D, Castle Street, Sleaford sits on the 14th largest plot.

21D, Castle Street, Sleaford has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 25 May 2018.

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

According to HM Land Registry, 21D, Castle Street, Sleaford was last sold on 9th May 2025 for £123,000 and was recorded as a freehold house.

The property has had 4 sales since 1995.

Since May 2025, the market for similar properties has risen by 39.7%.

• Sold May 2025£123,000
• Sold Jun 2018£110,000
• Sold Apr 2017£99,950

According to the Land Registry and our network of Estate Agents, there have been 3 sales of properties similar to 21D, Castle Street, Sleaford within a radius of 570 metres over the last 2 years.

The most recent example is 3, Thomas Street, Sleaford, NG34 7QD, a freehold house which sold for £107,500 on the 17th December 2025.

Read more about house prices in NG34.

• Sold Dec 2025£107,500 | 3 Bed House3, Thomas Street, Sleaford, NG34 7QD3, Thomas Street, Sleaford, NG34 7QD
• Sold Aug 2023£117,000 | 3 Bed House24, Castle Street, Sleaford, NG34 7QE24, Castle Street, Sleaford, NG34 7QE
• Sold Jun 2022£127,000 | 3 Bed House21C, Castle Street, Sleaford, NG34 7QE21C, Castle Street, Sleaford, NG34 7QE

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

Castle Street, Sleaford, NG34 has a total of 28 addresses. According to our analysis of all the public data, 21D, Castle Street, Sleaford is the 24th largest and the 22nd most expensive property on the street.

When compared to the postcode district it is £128k less expensive than the average property in NG34.

• 500

  m

  Church Lane Primary School & Nursery
• 500

  m

  Our Lady of Good Counsel Catholic Primary School, A Voluntary Academy
• 800

  m

  William Alvey School

• 300

  m

  Kesteven and Sleaford High School Selective Academy
• 300

  m

  St George's Academy
• 600

  m

  Carre's Grammar School

• 400

  m

  Sleaford
• 3.2

  km

  Rauceby
• 5.3

  km

  Ruskington

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 low.