Manor Gardens Cottage Park Lane Old Knebworth Knebworth Hertfordshire SG3 6QB

1. 20 Aug 2024

   Received by North Hertfordshire

2. 18 Dec 2024

   Decision issued: Conditional Consent

3. 3 Sep 2026

   Added to PlanIndex

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.

More on heritage and listed buildings applications in our guide

• The Green Park Lane Old Knebworth Hertfordshire

  21/02313/TCA Submitted 2 Aug 2021 62m away

  Removal of dead and diseased branches as per 'Tree Works'

  Granted Trees 4 docs

• The Meadow Land Off Park Lane Old Knebworth Hertfordshire

  21/02339/TCA Submitted 3 Aug 2021 93m away

  Removal of dead and diseased branches as per 'Tree Works'

  Granted Trees 4 docs

• Almshouses Park Lane Old Knebworth Hertfordshire SG3 6QE

  21/01855/LBC Submitted 29 Jun 2021 163m away

  Take down and rebuild section of rear (south-east facing) wall to outbuildings and replace asbestos cement sheet roofing with corrugated fibre cement roofing.

  Granted Heritage and listed buildings Demolition 9 docs

• Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS

  26/00817/FPH Submitted 27 Mar 2026 305m away

  Insertion of front bay window following removal of existing garage doors to facilitate garage conversion into habitable accommodation. Front entrance porch and installation of side canopy. Insertion of rooflights to existing rear element roofslope. Alterations to fenestration. Erection of boundary wall/railings and installation of entrance gates.

  Decided Householder Extension Loft or dormer +1 12 docs
  Small domestic

• Larch House Old Knebworth Lane Knebworth Hertfordshire SG3 6FS

  26/00424/FPH Submitted 2 Mar 2026 305m away

  Erection of four bay cartlodge with habitable accommodation at first floor and external staircase following demolition of existing stables and store.

  Decided Householder Demolition 11 docs
  Domestic

• Knebworth Estate Knebworth Park Old Knebworth Knebworth Hertfordshire SG3 6PY

  21/00290/FP Submitted 28 Jan 2021 346m away

  Temporary use of land for film making with associated temporary set and supporting facilities vehicles, access, parking and storage for 23 weeks alongside the temporary removal of part of an existing bund

  Decided Full applications 20 docs

• 26/02215/LBC Awaiting decision

  12 Cashio Lane Letchworth Garden City Hertfordshire SG6 1AX

  Single storey rear extension following partial demolition of existing garage.

  3 Sep 2026 Heritage and listed buildings
• 26/02079/LBC Awaiting decision

  172 Wilbury Road Letchworth Garden City Hertfordshire SG6 4JA

  Replace single-glazed first floor window on front elevation with timber slimline double-glazed window.

  2 Sep 2026 Heritage and listed buildings
• 26/01870/LBC Awaiting decision

  15 The Green Kimpton Hitchin Hertfordshire SG4 8RZ

  Replace 1 no. window to front (WF1) with a timber 16mm double-glazed unit.

  28 Aug 2026 Heritage and listed buildings
• 26/01684/LBC Awaiting decision

  13 - 14 The Green Kimpton Hertfordshire SG4 8RZ

  Replace windows to front (WG7, WG8, WG9, WF2, WF3, WF4), side (WG1, WG3) and rear (WG2, WG4, WG5, WG6, WF1) with timber 16mm double-glazed units and replace 2 no. door sets (DG1 and DG2) to rear.

  28 Aug 2026 Heritage and listed buildings
• 26/01871/LBC Awaiting decision

  16 The Green Kimpton Hertfordshire SG4 8RZ

  Replace 2 no. windows to front (WG1 and WF1) with timber 16mm double-glazed units.

  28 Aug 2026 Heritage and listed buildings