23, Thirlmere, Stevenage occupies a 329 m² plot as recorded by HM Land Registry.

All 42 other houses in this postcode have recorded plot sizes, and this one ranks as the 9th largest.

23, Thirlmere, Stevenage has an Energy Performance Rating (EPC) of D. This is based on the most recent assessment, dated 18 Sep 2014.

The property is not connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

23, Thirlmere, Stevenage last changed hands on 15th April 1999, selling for £158,950. The transaction was logged as a freehold house by HM Land Registry.

That is its only recorded sale since 1995.

• Sold Apr 1999£158,950

Land Registry records and our Estate Agent network show 169 sales of comparable properties within 710 metres of 23, Thirlmere, Stevenage since 2015.

Most recently, 94, Serpentine Close, Stevenage, SG1 6AR, a freehold house, sold at £525,000 on the 19th November 2025.

Read more about house prices in SG1.

• Sold Nov 2025£525,000 | 3 Bed House94, Serpentine Close, Stevenage, SG1 6AR94, Serpentine Close, Stevenage, SG1 6AR
• Sold Oct 2025£538,500 | 3 Bed House10, Windermere Close, Stevenage, SG1 6AG10, Windermere Close, Stevenage, SG1 6AG
• Sold May 2025£420,000 | 3 Bed House50, Serpentine Close, Stevenage, SG1 6AP50, Serpentine Close, Stevenage, SG1 6AP
• Sold Mar 2025£440,000 | 4 Bed House24, Compton Place, Stevenage, SG1 4FN24, Compton Place, Stevenage, SG1 4FN
• Sold Dec 2024£450,000 | 3 Bed House35, Serpentine Close, Stevenage, SG1 6AP35, Serpentine Close, Stevenage, SG1 6AP
• Sold May 2024£445,000 | 4 Bed House22, Compton Place, Stevenage, SG1 4FN22, Compton Place, Stevenage, SG1 4FN
• Sold Feb 2024£610,000 | 4 Bed House116, Serpentine Close, Stevenage, SG1 6AR116, Serpentine Close, Stevenage, SG1 6AR
• Sold Oct 2022£570,000 | 4 Bed House104, Serpentine Close, Stevenage, SG1 6AR104, Serpentine Close, Stevenage, SG1 6AR
• Sold Oct 2022£560,000 | 4 Bed House3, Thirlmere, Stevenage, SG1 6AQ3, Thirlmere, Stevenage, SG1 6AQ
• Sold Sep 2021£556,000 | 4 Bed House83, Thirlmere, Stevenage, SG1 6AQ83, Thirlmere, Stevenage, SG1 6AQ
• Sold Jun 2021£475,000 | 4 Bed House32, Windermere Close, Stevenage, SG1 6AG32, Windermere Close, Stevenage, SG1 6AG
• Sold Jan 2021£405,000 | 4 Bed House1, Monarch Rise, Stevenage, SG1 4FS1, Monarch Rise, Stevenage, SG1 4FS
• Sold Aug 2019£413,000 | 3 Bed House11, Windermere Close, Stevenage, SG1 6AG11, Windermere Close, Stevenage, SG1 6AG
• Sold Jul 2019£470,000 | 4 Bed House29, Windermere Close, Stevenage, SG1 6AG29, Windermere Close, Stevenage, SG1 6AG
• Sold Nov 2017£500,000 | 4 Bed House85, Thirlmere, Stevenage, SG1 6AQ85, Thirlmere, Stevenage, SG1 6AQ
• Sold Aug 2017£435,000 | 4 Bed House17, Windermere Close, Stevenage, SG1 6AG17, Windermere Close, Stevenage, SG1 6AG
• Sold Jul 2017£445,000 | 3 Bed House41, Thirlmere, Stevenage, SG1 6AQ41, Thirlmere, Stevenage, SG1 6AQ
• Sold Jan 2017£475,000 | 4 Bed House19, Thirlmere, Stevenage, SG1 6AQ19, Thirlmere, Stevenage, SG1 6AQ
• Sold Nov 2016£415,000 | 4 Bed House5, Windermere Close, Stevenage, SG1 6AG5, Windermere Close, Stevenage, SG1 6AG
• Sold Apr 2015£395,000 | 4 Bed House12, Windermere Close, Stevenage, SG1 6AG12, Windermere Close, Stevenage, SG1 6AG

Our analysis of the public data ranks 23, Thirlmere, Stevenage as the 33rd largest and the 27th most expensive of the 72 addresses on Thirlmere, Stevenage, SG1.

Against the SG1 postcode district average, it is £179k more expensive than the typical property.

• Martins Wood Primary School

  900 m away
• Round Diamond Primary School

  900 m away
• The Leys Primary and Nursery School

  1.3 km away

• The Nobel School

  1.5 km away
• Marriotts School

  2.5 km away
• Barclay Academy

  3.0 km away

• Stevenage

  |

  4.0 km away
• Knebworth

  |

  6.7 km away
• Hitchin

  |

  7.6 km away

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