11, Constance Place, Knebworth has an Energy Performance Rating (EPC) of B. This is based on the most recent assessment, dated 06 May 2016.

The property is not connected to mains gas and has high performance glazing. It is heated using air source heat pump (underfloor, electric).

The most recent sale of 11, Constance Place, Knebworth completed on 8th September 2017 at £390,000 and was recorded by HM Land Registry as a leasehold flat.

Since 1995 this is the property's only sale.

Values of comparable properties have dropped by 10.7% over the period since September 2017.

• Sold Sep 2017£390,000

Since 2016 39 properties similar to 11, Constance Place, Knebworth have sold within a radius of 920 metres, per the Land Registry and our network of Estate Agents.

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

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 Mar 2025£480,500 | 3 Bed Flat12, Lowe House, Knebworth, SG3 6EU12, Lowe House, Knebworth, SG3 6EU
• 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 Dec 2021£480,000 | 3 Bed Flat46, Lowe House, Knebworth, SG3 6EU46, Lowe House, Knebworth, SG3 6EU
• Sold Apr 2021£365,000 | 3 Bed Flat6, Lowe House, Knebworth, SG3 6EU6, Lowe House, Knebworth, SG3 6EU
• Sold Feb 2021£385,000 | 3 Bed Flat12, Constance Place, Knebworth, SG3 6EE12, Constance Place, Knebworth, SG3 6EE
• Sold Aug 2020£407,500 | 3 Bed Flat3, Constance Place, Knebworth, SG3 6EE3, 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 Jun 2016£429,950 | 3 Bed Flat4, Constance Place, Knebworth, SG3 6EE4, Constance Place, Knebworth, SG3 6EE

Of the 26 addresses on Constance Place, Knebworth, SG3, 11, Constance Place, Knebworth comes out as the largest and the most expensive in our analysis of the public data.

It is also £124k less expensive than the average property across the SG3 district.

• 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

The flood risk here is rated Very Low, based on Environment Agency data.