12, Constance Place, Knebworth has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 19 May 2026.

The property is not connected to mains gas and has fully double glazed windows. It is heated using electric underfloor heating.

According to HM Land Registry, 12, Constance Place, Knebworth was last sold on 23rd February 2021 for £385,000 and was recorded as a leasehold flat.

The property has had 2 sales since 1995.

Since February 2021, the market for similar properties has dropped by 14.1%.

• Sold Feb 2021£385,000
• Sold Jun 2016£409,950

According to the Land Registry and our network of Estate Agents, there have been 46 sales of properties similar to 12, Constance Place, Knebworth within a radius of 920 metres since 2016.

The most recent example is 9, Lowe House, Knebworth, SG3 6EU, a leasehold flat which sold for £333,000 on the 17th December 2025.

Read more about house prices in SG3.

• Sold Dec 2025£333,000 | 3 Bed Flat9, Lowe House, Knebworth, SG3 6EU9, Lowe House, Knebworth, SG3 6EU
• Sold Jul 2025£315,000 | 2 Bed Flat10, Constance Place, Knebworth, SG3 6EE10, Constance Place, Knebworth, SG3 6EE
• Sold Dec 2024£380,000 | 3 Bed Flat40, Lowe House, Knebworth, SG3 6EU40, Lowe House, Knebworth, SG3 6EU
• Sold Aug 2024£448,500 | 3 Bed Flat47, Lowe House, Knebworth, SG3 6EU47, Lowe House, Knebworth, SG3 6EU
• Sold Jul 2024£485,000 | 3 Bed Flat21, Constance Place, Knebworth, SG3 6EE21, Constance Place, Knebworth, SG3 6EE
• Sold Jun 2024£460,500 | 3 Bed Flat38, Lowe House, Knebworth, SG3 6EU38, Lowe House, Knebworth, SG3 6EU
• Sold Jun 2024£450,000 | 3 Bed Flat5, Constance Place, Knebworth, SG3 6EE5, Constance Place, Knebworth, SG3 6EE
• Sold Apr 2024£380,000 | 3 Bed Flat19, Lowe House, Knebworth, SG3 6EU19, Lowe House, Knebworth, SG3 6EU
• Sold Apr 2024£420,000 | 3 Bed Flat3, Lowe House, Knebworth, SG3 6EU3, Lowe House, Knebworth, SG3 6EU
• Sold Nov 2023£427,900 | 3 Bed Flat22, Lowe House, Knebworth, SG3 6EU22, Lowe House, Knebworth, SG3 6EU
• Sold Oct 2023£450,000 | 3 Bed Flat45, Lowe House, Knebworth, SG3 6EU45, Lowe House, Knebworth, SG3 6EU
• Sold Nov 2022£497,000 | 3 Bed Flat29, Lowe House, Knebworth, SG3 6EU29, Lowe House, Knebworth, SG3 6EU
• Sold Nov 2022£465,000 | 3 Bed Flat20, Constance Place, Knebworth, SG3 6EE20, Constance Place, Knebworth, SG3 6EE
• Sold Aug 2020£407,500 | 3 Bed Flat3, Constance Place, Knebworth, SG3 6EE3, Constance Place, Knebworth, SG3 6EE
• Sold Sep 2017£390,000 | 3 Bed Flat11, Constance Place, Knebworth, SG3 6EE11, Constance Place, Knebworth, SG3 6EE
• Sold Aug 2016£399,950 | 3 Bed Flat15, Constance Place, Knebworth, SG3 6EE15, Constance Place, Knebworth, SG3 6EE
• Sold Aug 2016£399,950 | 3 Bed Flat6, Constance Place, Knebworth, SG3 6EE6, Constance Place, Knebworth, SG3 6EE
• Sold Aug 2016£435,950 | 3 Bed Flat26, Constance Place, Knebworth, SG3 6EE26, Constance Place, Knebworth, SG3 6EE
• Sold Aug 2016£424,950 | 3 Bed Flat25, Constance Place, Knebworth, SG3 6EE25, Constance Place, Knebworth, SG3 6EE
• Sold May 2016£430,713 | 3 Bed Flat16, Constance Place, Knebworth, SG3 6EE16, Constance Place, Knebworth, SG3 6EE

Constance Place, Knebworth, SG3 has a total of 26 addresses. According to our analysis of all the public data, 12, Constance Place, Knebworth is the 5th largest and the 5th most expensive property on the street.

When compared to the postcode district it is £143k less expensive than the average property in SG3.

• Knebworth Primary and Nursery School

  100 m away
• All Saints Church of England Voluntary Aided Primary School, Datchworth

  1.5 km away
• St Michael's Woolmer Green CofE VA Primary School

  1.5 km away

• Barnwell School

  2.9 km away
• Marriotts School

  4.4 km away
• Monk's Walk School

  5.3 km away

• Knebworth

  |

  500 m away
• Watton-at-Stone

  |

  4.4 km away
• Stevenage

  |

  4.5 km away

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